Studies on Diversity and Seasonal Variations in Ichthyofauna of Chandrasarova...ijtsrd
The present study deals with ichthyofaunal diversity of Chandrasarovar pond of Jhalawar, Rajasthan. Total 23 species from 6 orders, 10 families and 19 genera were recorded during the present study. The range of water parameters such as temperature, pH, dissolved oxygen alkalinity and hardness were recorded and found suitable for fish production. Dominant family Cyprinidae with 12 species and 08 genera followed by Bagridae with 03 species 02 genera and other all families Claridea, Heteropneustidae, Cichilidae, Channidae, Gobiidae, Belonidae, Mastacembelidae, Poecilidae and Anguilidae contributed single species with single genera. Regarding conservation status out of 23 fish species 21 species least concern and 2 species near threaten. During month of December post monsoon highest fish diversity was found. Seasonal diversity indices such as Shannon Wiener species diversity, Pielou’s evenness, Margalef’s species richness, were calculated based on the abundance of fish species to access the ecosystem health of Chandrasarovar pond of Jhalawar. These studies will be help for the maintenance and regulation of Ichthyofauna and other aquatic ecosystem of the Chandrasarovar pond of Jhalawar, Rajasthan Arjumand Qureshi "Studies on Diversity and Seasonal Variations in Ichthyofauna of Chandrasarovar Pond of Jhalawar (Rajasthan)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd43619.pdf Paper URL: https://www.ijtsrd.combiological-science/zoology/43619/studies-on-diversity-and-seasonal-variations-in-ichthyofauna-of-chandrasarovar-pond-of-jhalawar-rajasthan/arjumand-qureshi
Bio-economic analysis of ESBN fishery of Kumira, the coastal area of Chittago...AbdullaAlAsif1
The present investigation was conducted from May to December 2005 at Kumira, the representative area of Chittagong coast for bio-socioeconomic analysis of ESBN fishery. In catch composition of Kumira, it was observed that finfish occupied 77.03 %, shrimp 19.82 % and crab 3.15 % and the average catch per boat per day were found 16.6 kg in Kumira. The highest total catch per boat per day (50 kg) was found in October at Kumira. The lowest catch was found (2 kg) in August at Kumira. The average total catch per landing center per month was found 14805 kg at Kumira. The average catch per fishermen per day was found 3.39 kg at Kumira and the average cost per boat per month was about 7,813 Tk in the study area. Average sale per month was found over 18,713 Tk in Kumira. During the month July and August most of the fishermen were engaged in Hilsa fishing with the Hilsa gill net resulting the total catch was with ESBN lowest in those months.
Biodiversity Status of Fishes from Vettathukadavu, Kayamkulam Backwater, Keralapaperpublications3
Abstract: The fishes are one of the most important, vertebrate, provided rich protein sources for human and several animals and important elements in the economy of many countries. Fish diversity essentially represents the fish faunal diversity. The survey was undertaken during the period from February 2016 to july 2016 in the region of Vettathukadavu, in Kayamkulam backwater, Kerala. The major objective of this study was to find out the biodiversity status of fishes in the Vettathukadavu region of Kayamkulam backwater, Kerala. Conservation status of fishes was assessed by IUCN Conservation status. The Survey of the studied stretch of backwater were resulted in recording of 25 fish species belonging to 6 orders and 15 familes. Of the 25 species reported during the study, 15 are least concern, 1 is critically endangered, 1 is vulnerable, 6 species are not evaluated and 2 species are not reported in IUCN Red.
Keywords: Icthyofauna, Biodiversity, IUCN, Endangered.
Title: Biodiversity Status of Fishes from Vettathukadavu, Kayamkulam Backwater, Kerala
Author: Remya.R, Dr. S.Amina
ISSN 2349-7823
International Journal of Recent Research in Life Sciences (IJRRLS)
Paper Publications
India is rich in natural resources and the annual harvestable fishery potential of the country is estimated to be 3.48 million
tones. It is established that the fish biodiversity of the country is diminishing at an alarming rate in all the aquatic zones. The
data on species diversity of fishes from Uran coast revealed presence of 31 species of which 3 species of Chondricthyes
representing 2 genera and 2 families and 28 species of Osteicthyes representing 28 genera and 23 families were recorded. Of the recorded species, 55 % belonged to Order Perciformes, 10 % to Clupeiformes, 6 % each to Rajiformes, Mugiliformes and Anguilliformes, 3 % each to Aulopiformes, Carcharhiniformes, Pleuronectiformes, Siluriformes and Tetraodontiformes. Among the recorded species, ribbon fishes/spiny hair tail (Lepturacanthus savala), croakers (Johnius soldado), dhoma (Sciaena dussumierii) and gold spotted grenadier anchovy (Coilia dussumierii) are abundant where as Bleeker’s whipray (Himantura bleekeri), Sharp nose stingray (H. gerrardi) and Spotted Green Puffer fish (Tetraodon nigroviridis) were rare. Stripped mullet (Mugil cephalus), cat fish (Mystus seenghala), three stripped tiger fish (Terapon jarbua) and mudskippers (Boleophthalmus boddarti) were very common. At present, the yield of fin-fish resources from Uran coast is optimum; it is decreasing day by day due to coastal pollution affecting the status of the local fishermen because of which they are looking for other jobs for their livelihood.
Keywords: Fin-fish Resources, Species diversity, JNPT, Uran, Navi Mumbai
ABSTRACT- Order siluriformes, Bagridae family of four number of catfish species provides information on the diets of
Mystus bleekeri, Mystus cavasius, Mystus tengara, Mystus vittatus in Lower Manair reservoir. The total of 1021 fish
species examined and their stomach content was analyzed. The frequency of occurrence and numerical methods were
employed in this study. In the numerical analysis, crustaceans and insect parts (85.91%) constituted the most important
diet of Mystus bleekeri followed by fish remains (78.40%), plant materials (69.01%), algae/ protozoan (64.79%), molluscs
(63.38%), detritus (56.81%) and sand grains (33.80%). The number of food items were enumerated for the crustaceans
and insect parts in Mystus bleekeri have been contained the maximum percentage (34.84%) of the content under
frequency of occurrence method followed by algae and protozoan with 20.76%, Molluscs with 18.37%, plant materials
with 15.60% and sand grains with 10.44%. The result of the analysis showed that Mystus cavasius, Mystus tengara,
Mystus vittatus fed on similar food items. These were mainly crustaceans, molluscans, fish remains and macrophytes.
Other food items include algae, detritus, sand grains. These four species are omnivorous and occupy the same ecological
niche.
Key-words- Cat fish, Food and feeding, Frequency, Numerical method
Biodiversity and abundance of fish and plankton of nguru lake, northeastern, ...Alexander Decker
This document summarizes a study on the biodiversity and abundance of fish and plankton in Nguru Lake, Nigeria. Twenty-five species of phytoplankton from four divisions were found in the lake. Sixteen species of zooplankton from four groups were present. Twenty-four fish species belonging to thirteen families were identified. The family Cichlidae dominated the fish population. Shannon-Weiner indices indicated some stations had higher diversity and were less polluted than others. The study provides baseline data on the lake's biodiversity to support development of its fisheries potential.
Effects of Different Kinds of Fertilizers on Growth and Production of Fishes ...Premier Publishers
The experiment was conducted to determine the effects of different kinds of fertilizers on growth and production of fishes (Hypophthalmichthys molitrix, Oreochromis niloticus and Cirrhinus cirrhosus) in polyculture for four months in six earthen ponds which were situated at the south-east corner of the Faculty of Fisheries Buildings, Bangladesh Agricultural University, Mymensingh. The experiment was carried out under three treatments and each pond was stocked with a total of 60 fingerlings at the rate 60/decimal. Pond nos. 2, 4 were under treatment-I where use of cowdung 10 kg/dec./2 weeks, pond nos. 1, 3 were under the treatment-II where use of TSP of 90g/dec./two weeks and pond nos. 5, 6 were under the treatment-III where use of urea of 60g/dec./two weeks. The average initial length and weight of the fingerlings of silver carp, tilapia and mrigal were 10.52, 10.89 and 14.40cm respectively and 17.92, 30.00 and 46.67g respectively. During the experimental period the ranges of water temperature (14.50 to 24.70 °C), transparency (22.35 to 33.10 cm), dissolved oxygen (6.50 to 8.20 mg/L), pH (6.40 to 8.20), total alkalinity (145.00 to 210.00 mg/L), Free CO2 (1.40 to 3.10 mg/L), phosphate-phosphorus (1.50 to 2.30 mg/L), and nitrate-nitrogen (2.70 to 4.00 mg/L) were found within the productive limit and more or less similar in all the ponds under the treatments-I,II, and III. There were 24 genera of phytoplankton under five major groups and 9 genera of zooplankton under three major groups in the experimental ponds. The calculated gross and net productions, under treatment-I were 1.71 ton/ha/yr and 0.43 ton/ha/yr respectively, under treatment-II were 2.01 ton/ha/yr and 0.72 ton/ha/yr. respectively and under treatment-III were 1.69 ton/ha/yr and 0.41 ton/ha/yr respectively. From the present experiment on fish culture it might be concluded that as single fertilizer TSP is the best fertilizer to be used in fish culture ponds because in treatment-II, net and gross productions were highest than those in treatments I and III.
ABSTRACT- Lizardfishes are commercially important group of species contributing to the fishery in the Indian EEZ. Information on predation, prey-predator relationship and their assessments in respect of Saurida tumbil and Saurida undosquamis have been derived in this study. A total number of 1630 specimens of S. tumbil and 926 of S. undosquamis were used for stomach content analysis. The specimens of S. tumbil examined in the study ranged between 13.0-53.0 cm (TL) and of S. undosquamis 13.0-41.0 cm. Qualitative and quantitative analysis revealed that the species S. tumbil prefers food in order of abundance as a teleost fishes (41%), molluscs (9.16%), shrimps (3.64%), crabs (1.41%) and squilla (0.37%) and S. undosquamis prefers teleost fishes (49%), molluscs (11%) and shrimps (3%). In S. tumbil, the highest feeding intensity observed in July (50%) and in S. undosquamis, in October (41%) and the lowest intensity recorded in the month of June for both the species. Monthly Gonado Somatic Index (GSI) shown that the highest feeding was observed in January (10.55%) and July (10.76%) for S. tumbil whereas, in case of S. undosquamis, the GSI was highest in August (16.58% for males and 17.80% for females). The pieces of sand granules, detritus and benthic organisms in the stomachs of the species indicating the benthic nature at the sea bottom in the search of food. Occurrence of juvenile lizardfishes in gut contents of both the species indicates that the lizardfishes are cannibalistic in nature.
Key-words- Lizardfish, feeding intensity, Gonado Somatic Index (GSI), Cannibalism
Studies on Diversity and Seasonal Variations in Ichthyofauna of Chandrasarova...ijtsrd
The present study deals with ichthyofaunal diversity of Chandrasarovar pond of Jhalawar, Rajasthan. Total 23 species from 6 orders, 10 families and 19 genera were recorded during the present study. The range of water parameters such as temperature, pH, dissolved oxygen alkalinity and hardness were recorded and found suitable for fish production. Dominant family Cyprinidae with 12 species and 08 genera followed by Bagridae with 03 species 02 genera and other all families Claridea, Heteropneustidae, Cichilidae, Channidae, Gobiidae, Belonidae, Mastacembelidae, Poecilidae and Anguilidae contributed single species with single genera. Regarding conservation status out of 23 fish species 21 species least concern and 2 species near threaten. During month of December post monsoon highest fish diversity was found. Seasonal diversity indices such as Shannon Wiener species diversity, Pielou’s evenness, Margalef’s species richness, were calculated based on the abundance of fish species to access the ecosystem health of Chandrasarovar pond of Jhalawar. These studies will be help for the maintenance and regulation of Ichthyofauna and other aquatic ecosystem of the Chandrasarovar pond of Jhalawar, Rajasthan Arjumand Qureshi "Studies on Diversity and Seasonal Variations in Ichthyofauna of Chandrasarovar Pond of Jhalawar (Rajasthan)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd43619.pdf Paper URL: https://www.ijtsrd.combiological-science/zoology/43619/studies-on-diversity-and-seasonal-variations-in-ichthyofauna-of-chandrasarovar-pond-of-jhalawar-rajasthan/arjumand-qureshi
Bio-economic analysis of ESBN fishery of Kumira, the coastal area of Chittago...AbdullaAlAsif1
The present investigation was conducted from May to December 2005 at Kumira, the representative area of Chittagong coast for bio-socioeconomic analysis of ESBN fishery. In catch composition of Kumira, it was observed that finfish occupied 77.03 %, shrimp 19.82 % and crab 3.15 % and the average catch per boat per day were found 16.6 kg in Kumira. The highest total catch per boat per day (50 kg) was found in October at Kumira. The lowest catch was found (2 kg) in August at Kumira. The average total catch per landing center per month was found 14805 kg at Kumira. The average catch per fishermen per day was found 3.39 kg at Kumira and the average cost per boat per month was about 7,813 Tk in the study area. Average sale per month was found over 18,713 Tk in Kumira. During the month July and August most of the fishermen were engaged in Hilsa fishing with the Hilsa gill net resulting the total catch was with ESBN lowest in those months.
Biodiversity Status of Fishes from Vettathukadavu, Kayamkulam Backwater, Keralapaperpublications3
Abstract: The fishes are one of the most important, vertebrate, provided rich protein sources for human and several animals and important elements in the economy of many countries. Fish diversity essentially represents the fish faunal diversity. The survey was undertaken during the period from February 2016 to july 2016 in the region of Vettathukadavu, in Kayamkulam backwater, Kerala. The major objective of this study was to find out the biodiversity status of fishes in the Vettathukadavu region of Kayamkulam backwater, Kerala. Conservation status of fishes was assessed by IUCN Conservation status. The Survey of the studied stretch of backwater were resulted in recording of 25 fish species belonging to 6 orders and 15 familes. Of the 25 species reported during the study, 15 are least concern, 1 is critically endangered, 1 is vulnerable, 6 species are not evaluated and 2 species are not reported in IUCN Red.
Keywords: Icthyofauna, Biodiversity, IUCN, Endangered.
Title: Biodiversity Status of Fishes from Vettathukadavu, Kayamkulam Backwater, Kerala
Author: Remya.R, Dr. S.Amina
ISSN 2349-7823
International Journal of Recent Research in Life Sciences (IJRRLS)
Paper Publications
India is rich in natural resources and the annual harvestable fishery potential of the country is estimated to be 3.48 million
tones. It is established that the fish biodiversity of the country is diminishing at an alarming rate in all the aquatic zones. The
data on species diversity of fishes from Uran coast revealed presence of 31 species of which 3 species of Chondricthyes
representing 2 genera and 2 families and 28 species of Osteicthyes representing 28 genera and 23 families were recorded. Of the recorded species, 55 % belonged to Order Perciformes, 10 % to Clupeiformes, 6 % each to Rajiformes, Mugiliformes and Anguilliformes, 3 % each to Aulopiformes, Carcharhiniformes, Pleuronectiformes, Siluriformes and Tetraodontiformes. Among the recorded species, ribbon fishes/spiny hair tail (Lepturacanthus savala), croakers (Johnius soldado), dhoma (Sciaena dussumierii) and gold spotted grenadier anchovy (Coilia dussumierii) are abundant where as Bleeker’s whipray (Himantura bleekeri), Sharp nose stingray (H. gerrardi) and Spotted Green Puffer fish (Tetraodon nigroviridis) were rare. Stripped mullet (Mugil cephalus), cat fish (Mystus seenghala), three stripped tiger fish (Terapon jarbua) and mudskippers (Boleophthalmus boddarti) were very common. At present, the yield of fin-fish resources from Uran coast is optimum; it is decreasing day by day due to coastal pollution affecting the status of the local fishermen because of which they are looking for other jobs for their livelihood.
Keywords: Fin-fish Resources, Species diversity, JNPT, Uran, Navi Mumbai
ABSTRACT- Order siluriformes, Bagridae family of four number of catfish species provides information on the diets of
Mystus bleekeri, Mystus cavasius, Mystus tengara, Mystus vittatus in Lower Manair reservoir. The total of 1021 fish
species examined and their stomach content was analyzed. The frequency of occurrence and numerical methods were
employed in this study. In the numerical analysis, crustaceans and insect parts (85.91%) constituted the most important
diet of Mystus bleekeri followed by fish remains (78.40%), plant materials (69.01%), algae/ protozoan (64.79%), molluscs
(63.38%), detritus (56.81%) and sand grains (33.80%). The number of food items were enumerated for the crustaceans
and insect parts in Mystus bleekeri have been contained the maximum percentage (34.84%) of the content under
frequency of occurrence method followed by algae and protozoan with 20.76%, Molluscs with 18.37%, plant materials
with 15.60% and sand grains with 10.44%. The result of the analysis showed that Mystus cavasius, Mystus tengara,
Mystus vittatus fed on similar food items. These were mainly crustaceans, molluscans, fish remains and macrophytes.
Other food items include algae, detritus, sand grains. These four species are omnivorous and occupy the same ecological
niche.
Key-words- Cat fish, Food and feeding, Frequency, Numerical method
Biodiversity and abundance of fish and plankton of nguru lake, northeastern, ...Alexander Decker
This document summarizes a study on the biodiversity and abundance of fish and plankton in Nguru Lake, Nigeria. Twenty-five species of phytoplankton from four divisions were found in the lake. Sixteen species of zooplankton from four groups were present. Twenty-four fish species belonging to thirteen families were identified. The family Cichlidae dominated the fish population. Shannon-Weiner indices indicated some stations had higher diversity and were less polluted than others. The study provides baseline data on the lake's biodiversity to support development of its fisheries potential.
Effects of Different Kinds of Fertilizers on Growth and Production of Fishes ...Premier Publishers
The experiment was conducted to determine the effects of different kinds of fertilizers on growth and production of fishes (Hypophthalmichthys molitrix, Oreochromis niloticus and Cirrhinus cirrhosus) in polyculture for four months in six earthen ponds which were situated at the south-east corner of the Faculty of Fisheries Buildings, Bangladesh Agricultural University, Mymensingh. The experiment was carried out under three treatments and each pond was stocked with a total of 60 fingerlings at the rate 60/decimal. Pond nos. 2, 4 were under treatment-I where use of cowdung 10 kg/dec./2 weeks, pond nos. 1, 3 were under the treatment-II where use of TSP of 90g/dec./two weeks and pond nos. 5, 6 were under the treatment-III where use of urea of 60g/dec./two weeks. The average initial length and weight of the fingerlings of silver carp, tilapia and mrigal were 10.52, 10.89 and 14.40cm respectively and 17.92, 30.00 and 46.67g respectively. During the experimental period the ranges of water temperature (14.50 to 24.70 °C), transparency (22.35 to 33.10 cm), dissolved oxygen (6.50 to 8.20 mg/L), pH (6.40 to 8.20), total alkalinity (145.00 to 210.00 mg/L), Free CO2 (1.40 to 3.10 mg/L), phosphate-phosphorus (1.50 to 2.30 mg/L), and nitrate-nitrogen (2.70 to 4.00 mg/L) were found within the productive limit and more or less similar in all the ponds under the treatments-I,II, and III. There were 24 genera of phytoplankton under five major groups and 9 genera of zooplankton under three major groups in the experimental ponds. The calculated gross and net productions, under treatment-I were 1.71 ton/ha/yr and 0.43 ton/ha/yr respectively, under treatment-II were 2.01 ton/ha/yr and 0.72 ton/ha/yr. respectively and under treatment-III were 1.69 ton/ha/yr and 0.41 ton/ha/yr respectively. From the present experiment on fish culture it might be concluded that as single fertilizer TSP is the best fertilizer to be used in fish culture ponds because in treatment-II, net and gross productions were highest than those in treatments I and III.
ABSTRACT- Lizardfishes are commercially important group of species contributing to the fishery in the Indian EEZ. Information on predation, prey-predator relationship and their assessments in respect of Saurida tumbil and Saurida undosquamis have been derived in this study. A total number of 1630 specimens of S. tumbil and 926 of S. undosquamis were used for stomach content analysis. The specimens of S. tumbil examined in the study ranged between 13.0-53.0 cm (TL) and of S. undosquamis 13.0-41.0 cm. Qualitative and quantitative analysis revealed that the species S. tumbil prefers food in order of abundance as a teleost fishes (41%), molluscs (9.16%), shrimps (3.64%), crabs (1.41%) and squilla (0.37%) and S. undosquamis prefers teleost fishes (49%), molluscs (11%) and shrimps (3%). In S. tumbil, the highest feeding intensity observed in July (50%) and in S. undosquamis, in October (41%) and the lowest intensity recorded in the month of June for both the species. Monthly Gonado Somatic Index (GSI) shown that the highest feeding was observed in January (10.55%) and July (10.76%) for S. tumbil whereas, in case of S. undosquamis, the GSI was highest in August (16.58% for males and 17.80% for females). The pieces of sand granules, detritus and benthic organisms in the stomachs of the species indicating the benthic nature at the sea bottom in the search of food. Occurrence of juvenile lizardfishes in gut contents of both the species indicates that the lizardfishes are cannibalistic in nature.
Key-words- Lizardfish, feeding intensity, Gonado Somatic Index (GSI), Cannibalism
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving as the advisor of Oceanography Division of Techno India University, Kolkata. He has to his credit about 388 scientific publications in various National and International journals, and 34 books of postgraduate standards. Dr. Mitra has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 29 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
A preliminary study of Ichthyofauna of Garhi Usmani Khel stream and Meherdy s...Innspub Net
This study identified 8 fish species from 2 streams in the Malakand district of Pakistan. The species belonged to 4 orders and 5 families. A total of 338 fish specimens were collected between May and August 2016. The most common family was Cyprinidae, represented by 3 species. Puntius chola was the most abundant species collected, while Ompok pabda was only represented by 1 specimen. It was concluded that O. pabda is endangered in the River Swat and conservation efforts are recommended.
Digestive enzyme activities in four diverse small indigenous fish species fro...Open Access Research Paper
Small indigenous fish species (SIFs) are important source of protein and micronutrients for the local population and hence considered as potential for aquaculture expansion. Pethia conchonius, Glossogobius giuris, Nandus nandus and Trichogaster fasciata are such SIFs found in Sareswar beel of Kokrajhar, Assam, India. This is an important beel with potential for development of fisheries in the region. Information on the food habit and digestive physiology are important in understanding the nutritional biology of a fish species essential for designing appropriate diet and feeding strategy for its successful culture. The present investigation aims to study and compare the feeding habit and digestive enzyme profile of these species. Relative gut length data suggested that P. conchonius and T. fasciata were herbivores, while N. nandus and G. giuris were omnivore and carnivore, respectively. Ga.SI varied in all the species (2.65 ± 1.39 to 4.66 ± 2.14) and the result indicated good or high feeding intensity in all the species. The highest amylase and lipase activity was observed in T. fasciata, and significantly lower activity was recorded in G. giuris and N. nandus, respectively. Pepsin was found to be highest in N. nandus while total protease was greatest in P. conchonius. Plasticity in the food intake in the natural environment seems to influence the enzyme activities. The present study has established vital information on the digestive enzyme properties and feeding nature of the four SIFs which may be useful in the development of suitable feed for their mass production for their successful culture.
Central Marine Fisheries Research Institute (CMFRI).pdfPinkiPaul2
The Central Marine Fisheries Research Institute (CMFRI) was established in 1947 by the Government of India. CMFRI conducts research on marine fisheries including estimating landings and effort, taxonomy of marine organisms, and stock assessments. It has headquarters in Kochi and regional centers along India's coastline. CMFRI's objectives include characterizing marine fisheries resources, describing productive fishery habitats, and evaluating declines in predatory species. The institute has made contributions to marine fisheries development including farm technologies for shrimp and shellfish. CMFRI also investigates the impacts of climate change and publishes the latest findings from its ongoing research.
A comparative study on fish biodiversity with conservation measures of the Bh...AbdullaAlAsif1
The present study was concerned to assess the present status of biodiversity in the Bhairab river, Jessore with its conservation measures. The study was based on primary observations, questionnaire interviews with 50 fishers, focus group discussions with river bank community members and cross-check interviews with key informants. The study was conducted for a period four months from May to August, 2016. The objective of the study was to assess the fish biodiversity in the Bhairab river, understand the existing fishing practices of the river and to identify proper management strategies for the conservation of fish biodiversity. Results of the study revealed that three kinds of fishers were engaged in the Bhairab river namely, professional fishers; seasonal fishers and subsistence fishers. Seven types of fishing gears like seine net, gill net, cast net, push net, lift net, trap and hook and line were operated to fish by the fishers during the survey. A total of 39 species of fish were identified in the catches of the Bhairab River. There are degraded ecosystems and declining biodiversity have found during the study. According to survey, fishing pressure and over fishing were responsible for almost 38% loss and pollution and siltation caused about 27% loss of ecosystem. Around 21% and 14% loss of ecosystem were caused by urbanization and human encroachment, and the recreational activities respectively. These have been created a great impact on river ecology. As a result, the water quality is deteriorating day by day and the availability of fish species and other aquatic biodiversity is decreasing gradually. During the survey, 20 species was found at a risk of being endangered. From the survey, it was found that the overexploitation of fish was responsible for the 40% losses of biodiversity in the Bhairab River and water pollution caused 35% loss of biodiversity. Henceforth, river course change and habitat degradation resulted in 15% and 10% loss of biodiversity of the river respectively. This study was identified possible ways to achieve a rich fish biodiversity in the Bhairab River with social, economic and environmental aspects. The specific recommendations are included community based fisheries management, establishment of sanctuary, control of pollution, maintenance of fishing gears and the implementation of fish act for conservation of fish biodiversity of the Bhairab River.
Distribution and Taxonomic Study of a Newly Recorded Croaking Gourami, Tricho...Shoaibe H T Shefat
this study aimed to enhance our understanding of the taxonomic status, source of introduction, impacts on native fish biodiversity and spreading pattern of this croaking gourami for proper management and conservation in Bangladesh.
Fish diversity-of-solmara-village-nalbari-luitomania-by-arnab-kumar-mishraarnab kumar mishra
solmara is located in nalbari district. It is 17 km away from nalbari town. The coordinates of solmara is 26.3796°N and 91.2951°E. solmara is surrounded by village 1) kaihati, 2) pipli bari 3)gandhia, 4) belsor, 5) suke kuchi ,6) kathia
Population dynamics of tinfoil barb, barbonymus schwanenfeldii (bleeker, 1853...Alexander Decker
1. Tinfoil barb (Barbonymus schwanenfeldii) was the dominant fish species found in Pedu Reservoir, comprising 38.9% of total catch.
2. Analysis of the length-frequency data showed B. schwanenfeldii could attain a maximum length (L∞) of 30.95 cm with a growth rate (K) of 0.66 yr-1.
3. Estimates of total mortality (Z), natural mortality (M), and fishing mortality (F) for B. schwanenfeldii were 2.01, 1.37, and 0.64 yr-1 respectively, indicating potential for a slight increase
Prospectives and Problems of Conservation, Development and Management of Clam...ijtsrd
Bhatye estuary, Ratnagiri is known for its mussel and clam fishery. Clam fishery is primarily supported by Meretrix meretrix, Katelysia opima and Paphia laterisulea. The clam fishery lasts for about 8 – 10 months. During lean period of open sea fishery, it provides protein rich food and livelihood to local population... Its shells are utilized as raw material in lime and cement cottage industries. Considering its food and economic value they are over exploited. In the present study, economic and food value of clams, clam fishery, management and conservation aspects are discussed. Sanjay Kumbhar "Prospectives and Problems of Conservation, Development and Management of Clam Resource in the Bhatye Estuary Ratnagiri, Maharashtra, India" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30593.pdf Paper Url :https://www.ijtsrd.com/biological-science/zoology/30593/prospectives-and-problems-of-conservation-development-and-management-of-clam-resource-in-the-bhatye-estuary-ratnagiri-maharashtra-india/sanjay-kumbhar
A total of 93 species of macrobenthos belonging to 69 genera and 44 families were recorded from selected sites along the Karanja creek during present investigation (January 2004 to December 2005). The benthic fauna recorded, is highly diversified, heterogeneous in size and was represented by gastropods, crustaceans, pelecypods, polychaetes, echinoderms, coelenterates, cephalopods and poriferans in order of species abundance. Macro and micro algae of divisions chlorophyta, cyanophyta, rhodophyta, bracillariophyta and pheophyta, dominated the benthic flora of the creek.
Exclusive mangrove species recorded from the creek belongs to families Avicenniaceae, Euphorbiaceae and Rhizophoraceae. Among gastropods, Nerita oryzarum, Planaxis sulcatus, Bursa tuberculata were found abundantly whereas Murex adustus , Bursa elegans and Bursa lissostroma were recorded rarely. Among bivalves, Placenta placenta recorded from Karanja creek was with clean, luster white and large shells. Polychaetes like Perinereis cultrifera, Perinereis vancauria and Pseudonereis anamola were commonly reported. Presence of three species of sea
lilies (Antedon bifida, Antedon pitasus and Antedon rosacea) and one species of sea urchin (Echinus esculantus) is a unique diversity characteristic from Karanja creek
and no earlier reports are available for presence of such a number of echinoderm species in and around Mumbai coast. At present, Karanja creek supports rich diversity of molluscs, crustaceans and echinoderms, but in future, measures must be taken for protection and conservation of macrobenthos diversity.
The document summarizes a study on factors affecting trout protection in Kumrat Valley, Dir (U) KPK, Pakistan. It found that over 50% of respondents believed the local community considers threats to trout, while over 70% felt the community has a positive attitude toward protection. Nearly 80% stated pesticides used in agriculture harm trout. Over 60% agreed the community uses harmful hunting methods like electricity and dynamite. The study concluded there is a significant relationship between positive community perceptions and trout protection. It recommended increasing community awareness and training, as well as government support for trout production, protection policies, and market access to promote conservation.
Review on fresh water fish diversity of maharashtra (india)DrRavindraPawara
The current review deals with the freshwater fish
recorded and confirmed by various authors, 165 species belonging to 09 orders, 26 families and 82
genera in Maharashtra during 2000 to 2014 and will be useful for fishermen, consumers, fish industry
producers and researchers.
Aquatic weeds diversity of Fatki River in Magura district, BangladeshAbdullaAlAsif1
The study was conducted at Fatki River under Magura district to learn the aquatic weeds diversity and abundance. This paper focused on species variation, number of species, water quality parameter and identification of aquatic weeds. It was assessed by collecting samples from Chukinogor Ghat, Kechuadubi and Arpara bazar during May to August, 2016. Aquatic weeds were abundant in rainy season and the semi-aquatic weeds were available almost all the year round. According to this study, total 22 species belonging to 12 orders, 16 families and 21 genuses were found. Again, 46%, 28%, 26% of total aquatic weeds percentages identified from the Chukinogor Ghat, Kechuadubi and Arpara bazar respectively. During this study period, nine species of family Pontederiaceae, Convolvulaceae, Menyanthaceae, Asteraceae, Poaceae, Araceae, Amaranthaceae, Polygonaceae were common in Chukinogor Ghat, Kechuadubi and Arpara bazar. Noticeable species-Lemna minor, Marsilea quadrifolia, Ludwigia palustris, Aeschynomene aspera, Najas graminea, Hydrilla verticillata, Najas guadalupensis, Utricularia inflate were only found in Chukinogor Ghat. This species are easily adapted in large areas. On the other hands, two species were common in Chukinogor Ghat, Kechuadubi-Pistia stratiotes and Equisetum hyemale. Prominent species of Arpara bazar were Cyperus rotundus and Xanthium indicum. Total 11 species of aquatic weeds were mainly recognized from these Kechuadubi, while greatest number was recorded of 20 species from Chukinogor Ghat and 12 species were have its place to Arpara bazar. Management technique and water quality parameters were also studied during study period and the temperature was recorded 29.0-30.00 ºC in Chukinogor Ghat, same as 28.0-320 ºC in Kechuadubi. Furthermore, 29.0-31.00 ºC temperature was found in Arpara bazar. DO levels were stable at ranged from7.0-7.5 ppm in Chukinogor Ghat and 4.7-5.3 ppm was recorded in two experimental Kechuadubi 4.5-5.0 in Arpara bazar respectively. This difference may arise due to the using of aerator in the Chukinogor Ghat same as decomposition, intensity of light in Kechuadubi and Arpara bazar. Transparency was 28-32cm in Chukinogor Ghat, 36-44cm in Kechuadubi, and 38-42 cm in Arpara bazar.
Growth of freshwater mud eel (Monopterus cuchia) in different water condition...AbdullaAlAsif1
An experiment was conducted to study the effect of different feeds on growth and production of freshwater Mud Eel (Monopterus cuchia) in nine aquariums over a period of 90 days during June to August 2016. Three different feeds namely Feed A (live feed), Feed B (supplementary feed) and Feed C (probiotics) were applied to treatments I, II and III respectively. Three types of water used in aquarium. These are pond water, ground water and turbid water. Each of the tanks was stocked with nine fish that's total fish amount of 27. Significantly highest weight gain was obtained in pond water, treatment III, (16.39a ± 2.35). Treatment III yielded the highest (65.56a ±9.4 g/m 2 /year) production with the highest survival rate of fish. Water quality parameters like temperature, dissolved oxygen, P H , and alkalinity were optimum. On the basis of better growth and production, it is suggested that pond water condition with probiotics are suitable for the culture of M. cuchia in aquarium.
AcomparativestudyonfishbiodiversitywithconservationmeasuresoftheBhairabriverJ...Overall, the PDF
Porém, uma vez que possui certa lógica através de cada número que é passado, esse é um jeito mais seguro de apostar que apenas jogar em qualquer número aleatório e torcer por sorte.
Como podemos ver, o palpite do kaledri para hoje é palpite versátil para aqueles que buscam palpites e interessantes para apostar.
Determination of pH, Dissolved Oxygen, Sulphate, Phosphate and Total Hardness...Hanieh Farzaneh
Sampling of the Physico-chemical factors from two stations on the surface water of Kukkarahalli Lake in Mysore City-India was carried out biweekly over a period of 3 months of 2014. The aims were to determine some Physico chemical parameters of water pollution. Temperature was measured using mercury in glass thermometer. Dissolved oxygen was determined by modified Winkler azide method while Phosphate was determined by Vendo Molybdate Method, Estimation of Sulphate as Sulphur in sample by Nephelometric Method, measurements of total hardness by Complexometric Method. The result revealed that the major causes of water quality deterioration were related to excess usage of fertilizers and chemicals for increasing yield of the crop or releasing the sewage into the lake, due to cumulative effect of human activities where in sewage disposal oxygen is used in decomposing these organic water, eutrophication which causes algal bloom and therefore inability of oxygen to adequately dissolved in the water or the lentic nature of the site where was no serious upturns. As this Lake also used to be a source of water supply to the city of Mysore, and today is a house of different variety of birds, animals, plants and fishes it is very essential to stop sewage disposal and illegal excessive land encroachments to eliminate the eutropohication of the lake, which this results of the Physico-chemical examination of this lake could be helpful in the management of the lake for its water quality and fisheries.
Determination of pH, Dissolved Oxygen, Sulphate, Phosphate and Total Hardness...Hanieh Farzaneh
Sampling of the Physico-chemical factors from two stations on the surface water of Kukkarahalli Lake in Mysore City-India was carried out biweekly over a period of 3 months of 2014. The aims were to determine some Physico chemical parameters of water pollution. Temperature was measured using mercury in glass thermometer. Dissolved oxygen was determined by modified Winkler azide method while Phosphate was determined by Vendo Molybdate Method, Estimation of Sulphate as Sulphur in sample by Nephelometric Method, measurements of total hardness by Complexometric Method. The result revealed that the major causes of water quality deterioration were related to excess usage of fertilizers and chemicals for increasing yield of the crop or releasing the sewage into the lake, due to cumulative effect of human activities where in sewage disposal oxygen is used in decomposing these organic water, eutrophication which causes algal bloom and therefore inability of oxygen to adequately dissolved in the water or the lentic nature of the site where was no serious upturns. As this Lake also used to be a source of water supply to the city of Mysore, and today is a house of different variety of birds, animals, plants and fishes it is very essential to stop sewage disposal and illegal excessive land encroachments to eliminate the eutropohication of the lake, which this results of the Physico-chemical examination of this lake could be helpful in the management of the lake for its water quality and fisheries.
Contribution of aquaculture on livelihood development of fish farmer at Noakh...AbdullaAlAsif1
The present study was conducted to assess the contribution of aquaculture on livelihood status of fish farmer at Noakhali sadar upazila. This research work was carried out during the period of February 2013 to July 2013. A total of 50 fish farmers were interviewed with a well-structured questionnaire. The survey revealed that average pond size was 0.48 ha with 40% of the farmers having ponds of single ownership, 20% having ponds of multiple-ownership, 30% having ponds of single lease and 10% having ponds of multiple leases. Poly culture of Indian major carps and exotic carps has been practiced by most of the farmers. Fish fingerlings were stocked from April to June and average stocking density was 12,370 fingerlings/ha. The average fish production cost was Tk 69,870/ha/yr. Although the living condition of the rural fish farmers were poor, livelihood outcomes were found positive and 88% of the farmers have improved their socioeconomic conditions through fish farming. The gross income and net profit were Tk. 1, 06,400 and Tk. 1, 00,000/ha/yr respectively. The average monthly income was in range of BDT 15,000-25,000. Their basic need like food, cloth, house, education and medical facility had changed after fish farming. The households have broadly improved their food consumption, family education, standards of living, purchasing power, choice and economic ability through fish farming. The constraints for sustainable pond fish farming in the areas were lack of technical knowledge of the farmers, disease of fishes, multiple ownership of the pond, higher production cost (mainly seeds and feed), insufficient supply of fry and fingerlings, lack of money and credit facilities and inadequate extension services. It is therefore essential to provide the necessary training facilities with institutional and organizational supports, credit facilities and extension services for sustainable fish production and livelihoods of rural fish farmers.
Zooplankton species composition and diversity in the seagrass habitat of Lawa...AbdullaAlAsif1
Seagrass habitats are considered to be some of the most biodiverse ecosystems on the planet and safeguard some ecologically and economically important fauna, amongst which are some globally threatened species, including dugong. Malaysian seagrass ecosystems are not widespread, but their existence supports some significant marine fauna. A rigorous zooplankton study was conducted from May 2016 to February 2017, in the seagrass habitat of Lawas, Sarawak, Malaysia, to examine their temporal composition and diversity, together with their ecological influences. A total of 45 zooplankton species from 13 significant groups were recorded in the seagrass habitat. The population density of zooplankton ranged between 2,482 ind/m³ and 22,670 ind/m³ over three different seasons. A single zooplankton copepod was found to be dominant (47.40%), while bivalves were the second largest (31.8%) group in terms of total abundance. It was also noticed that the average relative abundance (0.62) and important species index (62.08) of copepods were higher than for other groups that exist in the seagrass meadow, whereas copepod Parvocalanus crassirostris showed both the highest average relative abundance (0.41) and the highest important species index (41.15). The diversity (H') and richness index of the intermediate season were found to be highest due to favourable physico-chemical conditions. Within the referred seasonal cluster, the wet and dry seasons were almost similar in terms of species abundance, while the intermediate season was distinct, with high species diversity backed by ANOSIM analysis results. Copepod and bivalves formed one group with a common similarity level of 0.80. The CCA (Canonical Correspondence Analysis) model established that abiotic factors, especially turbidity, NO , rainfall, dissolved oxygen and pH were significantly correlated with abundance of individual groups of zooplankton. Zooplankton assemblage and abundance in Lawas were found to be very rich in multiple seasons, indicating that the productivity of uninterrupted seagrass habitat might be high and the system rich in biodiversity.
Fisheries in small reservoir of chhattisgarh Ved Prakash Ratreyved05
The document summarizes fisheries in small reservoirs of Chhattisgarh, India. It provides background on India's position as a top fish producer globally. It then discusses the classification, productivity, fish diversity, management practices, and production levels of reservoirs in Chhattisgarh. Specifically, it notes that Chhattisgarh has over 1770 reservoirs covering 0.82 lakh hectares, with most being small reservoirs. Common management practices include stocking fish through culture-based fisheries and stock enhancement. The conclusion states that scientific management and government support could make Chhattisgarh's reservoir fisheries more prominent nationally.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
More Related Content
Similar to Feeding behaviour of different fresh wat
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving as the advisor of Oceanography Division of Techno India University, Kolkata. He has to his credit about 388 scientific publications in various National and International journals, and 34 books of postgraduate standards. Dr. Mitra has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 29 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
A preliminary study of Ichthyofauna of Garhi Usmani Khel stream and Meherdy s...Innspub Net
This study identified 8 fish species from 2 streams in the Malakand district of Pakistan. The species belonged to 4 orders and 5 families. A total of 338 fish specimens were collected between May and August 2016. The most common family was Cyprinidae, represented by 3 species. Puntius chola was the most abundant species collected, while Ompok pabda was only represented by 1 specimen. It was concluded that O. pabda is endangered in the River Swat and conservation efforts are recommended.
Digestive enzyme activities in four diverse small indigenous fish species fro...Open Access Research Paper
Small indigenous fish species (SIFs) are important source of protein and micronutrients for the local population and hence considered as potential for aquaculture expansion. Pethia conchonius, Glossogobius giuris, Nandus nandus and Trichogaster fasciata are such SIFs found in Sareswar beel of Kokrajhar, Assam, India. This is an important beel with potential for development of fisheries in the region. Information on the food habit and digestive physiology are important in understanding the nutritional biology of a fish species essential for designing appropriate diet and feeding strategy for its successful culture. The present investigation aims to study and compare the feeding habit and digestive enzyme profile of these species. Relative gut length data suggested that P. conchonius and T. fasciata were herbivores, while N. nandus and G. giuris were omnivore and carnivore, respectively. Ga.SI varied in all the species (2.65 ± 1.39 to 4.66 ± 2.14) and the result indicated good or high feeding intensity in all the species. The highest amylase and lipase activity was observed in T. fasciata, and significantly lower activity was recorded in G. giuris and N. nandus, respectively. Pepsin was found to be highest in N. nandus while total protease was greatest in P. conchonius. Plasticity in the food intake in the natural environment seems to influence the enzyme activities. The present study has established vital information on the digestive enzyme properties and feeding nature of the four SIFs which may be useful in the development of suitable feed for their mass production for their successful culture.
Central Marine Fisheries Research Institute (CMFRI).pdfPinkiPaul2
The Central Marine Fisheries Research Institute (CMFRI) was established in 1947 by the Government of India. CMFRI conducts research on marine fisheries including estimating landings and effort, taxonomy of marine organisms, and stock assessments. It has headquarters in Kochi and regional centers along India's coastline. CMFRI's objectives include characterizing marine fisheries resources, describing productive fishery habitats, and evaluating declines in predatory species. The institute has made contributions to marine fisheries development including farm technologies for shrimp and shellfish. CMFRI also investigates the impacts of climate change and publishes the latest findings from its ongoing research.
A comparative study on fish biodiversity with conservation measures of the Bh...AbdullaAlAsif1
The present study was concerned to assess the present status of biodiversity in the Bhairab river, Jessore with its conservation measures. The study was based on primary observations, questionnaire interviews with 50 fishers, focus group discussions with river bank community members and cross-check interviews with key informants. The study was conducted for a period four months from May to August, 2016. The objective of the study was to assess the fish biodiversity in the Bhairab river, understand the existing fishing practices of the river and to identify proper management strategies for the conservation of fish biodiversity. Results of the study revealed that three kinds of fishers were engaged in the Bhairab river namely, professional fishers; seasonal fishers and subsistence fishers. Seven types of fishing gears like seine net, gill net, cast net, push net, lift net, trap and hook and line were operated to fish by the fishers during the survey. A total of 39 species of fish were identified in the catches of the Bhairab River. There are degraded ecosystems and declining biodiversity have found during the study. According to survey, fishing pressure and over fishing were responsible for almost 38% loss and pollution and siltation caused about 27% loss of ecosystem. Around 21% and 14% loss of ecosystem were caused by urbanization and human encroachment, and the recreational activities respectively. These have been created a great impact on river ecology. As a result, the water quality is deteriorating day by day and the availability of fish species and other aquatic biodiversity is decreasing gradually. During the survey, 20 species was found at a risk of being endangered. From the survey, it was found that the overexploitation of fish was responsible for the 40% losses of biodiversity in the Bhairab River and water pollution caused 35% loss of biodiversity. Henceforth, river course change and habitat degradation resulted in 15% and 10% loss of biodiversity of the river respectively. This study was identified possible ways to achieve a rich fish biodiversity in the Bhairab River with social, economic and environmental aspects. The specific recommendations are included community based fisheries management, establishment of sanctuary, control of pollution, maintenance of fishing gears and the implementation of fish act for conservation of fish biodiversity of the Bhairab River.
Distribution and Taxonomic Study of a Newly Recorded Croaking Gourami, Tricho...Shoaibe H T Shefat
this study aimed to enhance our understanding of the taxonomic status, source of introduction, impacts on native fish biodiversity and spreading pattern of this croaking gourami for proper management and conservation in Bangladesh.
Fish diversity-of-solmara-village-nalbari-luitomania-by-arnab-kumar-mishraarnab kumar mishra
solmara is located in nalbari district. It is 17 km away from nalbari town. The coordinates of solmara is 26.3796°N and 91.2951°E. solmara is surrounded by village 1) kaihati, 2) pipli bari 3)gandhia, 4) belsor, 5) suke kuchi ,6) kathia
Population dynamics of tinfoil barb, barbonymus schwanenfeldii (bleeker, 1853...Alexander Decker
1. Tinfoil barb (Barbonymus schwanenfeldii) was the dominant fish species found in Pedu Reservoir, comprising 38.9% of total catch.
2. Analysis of the length-frequency data showed B. schwanenfeldii could attain a maximum length (L∞) of 30.95 cm with a growth rate (K) of 0.66 yr-1.
3. Estimates of total mortality (Z), natural mortality (M), and fishing mortality (F) for B. schwanenfeldii were 2.01, 1.37, and 0.64 yr-1 respectively, indicating potential for a slight increase
Prospectives and Problems of Conservation, Development and Management of Clam...ijtsrd
Bhatye estuary, Ratnagiri is known for its mussel and clam fishery. Clam fishery is primarily supported by Meretrix meretrix, Katelysia opima and Paphia laterisulea. The clam fishery lasts for about 8 – 10 months. During lean period of open sea fishery, it provides protein rich food and livelihood to local population... Its shells are utilized as raw material in lime and cement cottage industries. Considering its food and economic value they are over exploited. In the present study, economic and food value of clams, clam fishery, management and conservation aspects are discussed. Sanjay Kumbhar "Prospectives and Problems of Conservation, Development and Management of Clam Resource in the Bhatye Estuary Ratnagiri, Maharashtra, India" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30593.pdf Paper Url :https://www.ijtsrd.com/biological-science/zoology/30593/prospectives-and-problems-of-conservation-development-and-management-of-clam-resource-in-the-bhatye-estuary-ratnagiri-maharashtra-india/sanjay-kumbhar
A total of 93 species of macrobenthos belonging to 69 genera and 44 families were recorded from selected sites along the Karanja creek during present investigation (January 2004 to December 2005). The benthic fauna recorded, is highly diversified, heterogeneous in size and was represented by gastropods, crustaceans, pelecypods, polychaetes, echinoderms, coelenterates, cephalopods and poriferans in order of species abundance. Macro and micro algae of divisions chlorophyta, cyanophyta, rhodophyta, bracillariophyta and pheophyta, dominated the benthic flora of the creek.
Exclusive mangrove species recorded from the creek belongs to families Avicenniaceae, Euphorbiaceae and Rhizophoraceae. Among gastropods, Nerita oryzarum, Planaxis sulcatus, Bursa tuberculata were found abundantly whereas Murex adustus , Bursa elegans and Bursa lissostroma were recorded rarely. Among bivalves, Placenta placenta recorded from Karanja creek was with clean, luster white and large shells. Polychaetes like Perinereis cultrifera, Perinereis vancauria and Pseudonereis anamola were commonly reported. Presence of three species of sea
lilies (Antedon bifida, Antedon pitasus and Antedon rosacea) and one species of sea urchin (Echinus esculantus) is a unique diversity characteristic from Karanja creek
and no earlier reports are available for presence of such a number of echinoderm species in and around Mumbai coast. At present, Karanja creek supports rich diversity of molluscs, crustaceans and echinoderms, but in future, measures must be taken for protection and conservation of macrobenthos diversity.
The document summarizes a study on factors affecting trout protection in Kumrat Valley, Dir (U) KPK, Pakistan. It found that over 50% of respondents believed the local community considers threats to trout, while over 70% felt the community has a positive attitude toward protection. Nearly 80% stated pesticides used in agriculture harm trout. Over 60% agreed the community uses harmful hunting methods like electricity and dynamite. The study concluded there is a significant relationship between positive community perceptions and trout protection. It recommended increasing community awareness and training, as well as government support for trout production, protection policies, and market access to promote conservation.
Review on fresh water fish diversity of maharashtra (india)DrRavindraPawara
The current review deals with the freshwater fish
recorded and confirmed by various authors, 165 species belonging to 09 orders, 26 families and 82
genera in Maharashtra during 2000 to 2014 and will be useful for fishermen, consumers, fish industry
producers and researchers.
Aquatic weeds diversity of Fatki River in Magura district, BangladeshAbdullaAlAsif1
The study was conducted at Fatki River under Magura district to learn the aquatic weeds diversity and abundance. This paper focused on species variation, number of species, water quality parameter and identification of aquatic weeds. It was assessed by collecting samples from Chukinogor Ghat, Kechuadubi and Arpara bazar during May to August, 2016. Aquatic weeds were abundant in rainy season and the semi-aquatic weeds were available almost all the year round. According to this study, total 22 species belonging to 12 orders, 16 families and 21 genuses were found. Again, 46%, 28%, 26% of total aquatic weeds percentages identified from the Chukinogor Ghat, Kechuadubi and Arpara bazar respectively. During this study period, nine species of family Pontederiaceae, Convolvulaceae, Menyanthaceae, Asteraceae, Poaceae, Araceae, Amaranthaceae, Polygonaceae were common in Chukinogor Ghat, Kechuadubi and Arpara bazar. Noticeable species-Lemna minor, Marsilea quadrifolia, Ludwigia palustris, Aeschynomene aspera, Najas graminea, Hydrilla verticillata, Najas guadalupensis, Utricularia inflate were only found in Chukinogor Ghat. This species are easily adapted in large areas. On the other hands, two species were common in Chukinogor Ghat, Kechuadubi-Pistia stratiotes and Equisetum hyemale. Prominent species of Arpara bazar were Cyperus rotundus and Xanthium indicum. Total 11 species of aquatic weeds were mainly recognized from these Kechuadubi, while greatest number was recorded of 20 species from Chukinogor Ghat and 12 species were have its place to Arpara bazar. Management technique and water quality parameters were also studied during study period and the temperature was recorded 29.0-30.00 ºC in Chukinogor Ghat, same as 28.0-320 ºC in Kechuadubi. Furthermore, 29.0-31.00 ºC temperature was found in Arpara bazar. DO levels were stable at ranged from7.0-7.5 ppm in Chukinogor Ghat and 4.7-5.3 ppm was recorded in two experimental Kechuadubi 4.5-5.0 in Arpara bazar respectively. This difference may arise due to the using of aerator in the Chukinogor Ghat same as decomposition, intensity of light in Kechuadubi and Arpara bazar. Transparency was 28-32cm in Chukinogor Ghat, 36-44cm in Kechuadubi, and 38-42 cm in Arpara bazar.
Growth of freshwater mud eel (Monopterus cuchia) in different water condition...AbdullaAlAsif1
An experiment was conducted to study the effect of different feeds on growth and production of freshwater Mud Eel (Monopterus cuchia) in nine aquariums over a period of 90 days during June to August 2016. Three different feeds namely Feed A (live feed), Feed B (supplementary feed) and Feed C (probiotics) were applied to treatments I, II and III respectively. Three types of water used in aquarium. These are pond water, ground water and turbid water. Each of the tanks was stocked with nine fish that's total fish amount of 27. Significantly highest weight gain was obtained in pond water, treatment III, (16.39a ± 2.35). Treatment III yielded the highest (65.56a ±9.4 g/m 2 /year) production with the highest survival rate of fish. Water quality parameters like temperature, dissolved oxygen, P H , and alkalinity were optimum. On the basis of better growth and production, it is suggested that pond water condition with probiotics are suitable for the culture of M. cuchia in aquarium.
AcomparativestudyonfishbiodiversitywithconservationmeasuresoftheBhairabriverJ...Overall, the PDF
Porém, uma vez que possui certa lógica através de cada número que é passado, esse é um jeito mais seguro de apostar que apenas jogar em qualquer número aleatório e torcer por sorte.
Como podemos ver, o palpite do kaledri para hoje é palpite versátil para aqueles que buscam palpites e interessantes para apostar.
Determination of pH, Dissolved Oxygen, Sulphate, Phosphate and Total Hardness...Hanieh Farzaneh
Sampling of the Physico-chemical factors from two stations on the surface water of Kukkarahalli Lake in Mysore City-India was carried out biweekly over a period of 3 months of 2014. The aims were to determine some Physico chemical parameters of water pollution. Temperature was measured using mercury in glass thermometer. Dissolved oxygen was determined by modified Winkler azide method while Phosphate was determined by Vendo Molybdate Method, Estimation of Sulphate as Sulphur in sample by Nephelometric Method, measurements of total hardness by Complexometric Method. The result revealed that the major causes of water quality deterioration were related to excess usage of fertilizers and chemicals for increasing yield of the crop or releasing the sewage into the lake, due to cumulative effect of human activities where in sewage disposal oxygen is used in decomposing these organic water, eutrophication which causes algal bloom and therefore inability of oxygen to adequately dissolved in the water or the lentic nature of the site where was no serious upturns. As this Lake also used to be a source of water supply to the city of Mysore, and today is a house of different variety of birds, animals, plants and fishes it is very essential to stop sewage disposal and illegal excessive land encroachments to eliminate the eutropohication of the lake, which this results of the Physico-chemical examination of this lake could be helpful in the management of the lake for its water quality and fisheries.
Determination of pH, Dissolved Oxygen, Sulphate, Phosphate and Total Hardness...Hanieh Farzaneh
Sampling of the Physico-chemical factors from two stations on the surface water of Kukkarahalli Lake in Mysore City-India was carried out biweekly over a period of 3 months of 2014. The aims were to determine some Physico chemical parameters of water pollution. Temperature was measured using mercury in glass thermometer. Dissolved oxygen was determined by modified Winkler azide method while Phosphate was determined by Vendo Molybdate Method, Estimation of Sulphate as Sulphur in sample by Nephelometric Method, measurements of total hardness by Complexometric Method. The result revealed that the major causes of water quality deterioration were related to excess usage of fertilizers and chemicals for increasing yield of the crop or releasing the sewage into the lake, due to cumulative effect of human activities where in sewage disposal oxygen is used in decomposing these organic water, eutrophication which causes algal bloom and therefore inability of oxygen to adequately dissolved in the water or the lentic nature of the site where was no serious upturns. As this Lake also used to be a source of water supply to the city of Mysore, and today is a house of different variety of birds, animals, plants and fishes it is very essential to stop sewage disposal and illegal excessive land encroachments to eliminate the eutropohication of the lake, which this results of the Physico-chemical examination of this lake could be helpful in the management of the lake for its water quality and fisheries.
Contribution of aquaculture on livelihood development of fish farmer at Noakh...AbdullaAlAsif1
The present study was conducted to assess the contribution of aquaculture on livelihood status of fish farmer at Noakhali sadar upazila. This research work was carried out during the period of February 2013 to July 2013. A total of 50 fish farmers were interviewed with a well-structured questionnaire. The survey revealed that average pond size was 0.48 ha with 40% of the farmers having ponds of single ownership, 20% having ponds of multiple-ownership, 30% having ponds of single lease and 10% having ponds of multiple leases. Poly culture of Indian major carps and exotic carps has been practiced by most of the farmers. Fish fingerlings were stocked from April to June and average stocking density was 12,370 fingerlings/ha. The average fish production cost was Tk 69,870/ha/yr. Although the living condition of the rural fish farmers were poor, livelihood outcomes were found positive and 88% of the farmers have improved their socioeconomic conditions through fish farming. The gross income and net profit were Tk. 1, 06,400 and Tk. 1, 00,000/ha/yr respectively. The average monthly income was in range of BDT 15,000-25,000. Their basic need like food, cloth, house, education and medical facility had changed after fish farming. The households have broadly improved their food consumption, family education, standards of living, purchasing power, choice and economic ability through fish farming. The constraints for sustainable pond fish farming in the areas were lack of technical knowledge of the farmers, disease of fishes, multiple ownership of the pond, higher production cost (mainly seeds and feed), insufficient supply of fry and fingerlings, lack of money and credit facilities and inadequate extension services. It is therefore essential to provide the necessary training facilities with institutional and organizational supports, credit facilities and extension services for sustainable fish production and livelihoods of rural fish farmers.
Zooplankton species composition and diversity in the seagrass habitat of Lawa...AbdullaAlAsif1
Seagrass habitats are considered to be some of the most biodiverse ecosystems on the planet and safeguard some ecologically and economically important fauna, amongst which are some globally threatened species, including dugong. Malaysian seagrass ecosystems are not widespread, but their existence supports some significant marine fauna. A rigorous zooplankton study was conducted from May 2016 to February 2017, in the seagrass habitat of Lawas, Sarawak, Malaysia, to examine their temporal composition and diversity, together with their ecological influences. A total of 45 zooplankton species from 13 significant groups were recorded in the seagrass habitat. The population density of zooplankton ranged between 2,482 ind/m³ and 22,670 ind/m³ over three different seasons. A single zooplankton copepod was found to be dominant (47.40%), while bivalves were the second largest (31.8%) group in terms of total abundance. It was also noticed that the average relative abundance (0.62) and important species index (62.08) of copepods were higher than for other groups that exist in the seagrass meadow, whereas copepod Parvocalanus crassirostris showed both the highest average relative abundance (0.41) and the highest important species index (41.15). The diversity (H') and richness index of the intermediate season were found to be highest due to favourable physico-chemical conditions. Within the referred seasonal cluster, the wet and dry seasons were almost similar in terms of species abundance, while the intermediate season was distinct, with high species diversity backed by ANOSIM analysis results. Copepod and bivalves formed one group with a common similarity level of 0.80. The CCA (Canonical Correspondence Analysis) model established that abiotic factors, especially turbidity, NO , rainfall, dissolved oxygen and pH were significantly correlated with abundance of individual groups of zooplankton. Zooplankton assemblage and abundance in Lawas were found to be very rich in multiple seasons, indicating that the productivity of uninterrupted seagrass habitat might be high and the system rich in biodiversity.
Fisheries in small reservoir of chhattisgarh Ved Prakash Ratreyved05
The document summarizes fisheries in small reservoirs of Chhattisgarh, India. It provides background on India's position as a top fish producer globally. It then discusses the classification, productivity, fish diversity, management practices, and production levels of reservoirs in Chhattisgarh. Specifically, it notes that Chhattisgarh has over 1770 reservoirs covering 0.82 lakh hectares, with most being small reservoirs. Common management practices include stocking fish through culture-based fisheries and stock enhancement. The conclusion states that scientific management and government support could make Chhattisgarh's reservoir fisheries more prominent nationally.
Similar to Feeding behaviour of different fresh wat (20)
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
The debris of the ‘last major merger’ is dynamically youngSérgio Sacani
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
Immersive Learning That Works: Research Grounding and Paths ForwardLeonel Morgado
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
Perhaps most importantly, Thermodynamics rapidly became a primary tool in the advance of applied science/engineering/technology, spanning micro-tech, to aerospace and cosmology. I can think of no better a story to illustrate the breadth of scientific methodologies and applications at their best.
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
ESR spectroscopy in liquid food and beverages.pptxPRIYANKA PATEL
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...Travis Hills MN
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptxMAGOTI ERNEST
Although Artemia has been known to man for centuries, its use as a food for the culture of larval organisms apparently began only in the 1930s, when several investigators found that it made an excellent food for newly hatched fish larvae (Litvinenko et al., 2023). As aquaculture developed in the 1960s and ‘70s, the use of Artemia also became more widespread, due both to its convenience and to its nutritional value for larval organisms (Arenas-Pardo et al., 2024). The fact that Artemia dormant cysts can be stored for long periods in cans, and then used as an off-the-shelf food requiring only 24 h of incubation makes them the most convenient, least labor-intensive, live food available for aquaculture (Sorgeloos & Roubach, 2021). The nutritional value of Artemia, especially for marine organisms, is not constant, but varies both geographically and temporally. During the last decade, however, both the causes of Artemia nutritional variability and methods to improve poorquality Artemia have been identified (Loufi et al., 2024).
Brine shrimp (Artemia spp.) are used in marine aquaculture worldwide. Annually, more than 2,000 metric tons of dry cysts are used for cultivation of fish, crustacean, and shellfish larva. Brine shrimp are important to aquaculture because newly hatched brine shrimp nauplii (larvae) provide a food source for many fish fry (Mozanzadeh et al., 2021). Culture and harvesting of brine shrimp eggs represents another aspect of the aquaculture industry. Nauplii and metanauplii of Artemia, commonly known as brine shrimp, play a crucial role in aquaculture due to their nutritional value and suitability as live feed for many aquatic species, particularly in larval stages (Sorgeloos & Roubach, 2021).
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
Feeding behaviour of different fresh wat
1. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 647 http://www.gjstx-e.cn/
Diving into Dietary Delights: Understanding the Feeding Habits of Six
Freshwater Fish Species
1
Kushal Thakur, 1
Mohit Gautam1
Hishani Kumari,
,1
Danish Mahajan, 1
Sunil Kumar, 1
Amit
Sharma and 1
Rakesh Kumar*
1
Department of Animal Sciences, Central University of Himachal Pradesh, 176206
Abstract:
This study aims to investigate the food and feeding habits of six freshwater fish
species: Tor putitora, Schizothorox richardsonii, Oreochromis niloticus, Labeo
rohita, Sperata seenghala, and Glyptothorax pectinopterus. The main objectives of
the study are to understand the dietary preferences and feeding behaviors of these fish
species. The findings from this investigation have several potential implications for
aquaculture and fisheries management. During the present investigation, it was
observed that Tor putitora is an omnivore, and as it gets bigger, its diet typically shifts
from carnivorous to omnivorous. Schizothorox richardsoniiis a periphytonic feeder,
eating Bacillariophyceae. However, Labeorohita, Oreochromis niloticus, Sperata
seenghala, and Glyptothorax pectinopterus were carnivorous. Sperata seenghala
prefers to consume fish larvae and zooplankton, while Glyptothorax pectinopterus
prefers insects and zooplankton.The findings of this study will help in the
development of an intensive polyculture and in the formulation of fish feed that takes
into account natural food preferences and feeding patterns.
Keywords:Tor putitora, Schizothorox richardsonii, Oreochromis niloticus, Labeo rohita
,Sperata seenghala, Glyptothorax pectinopterus.
Introduction:
A holistic understanding of fish diet and feeding behaviors contributes to sustainable
aquaculture practices. When fish are fed appropriately and efficiently, it minimizes the
environmental impact associated with excess feed and nutrient waste in the water. This aligns
with the broader goals of responsible aquaculture management and conservation of aquatic
ecosystems. Studying fish diet and feeding behaviors is a crucial step in the field of fisheries
and aquaculture. It not only helps improve fish production and the efficiency of aquaculture
operations but also plays a role in environmental sustainability and the overall health and well-
being of the fish populations being raised(Malami et al., 2004).
2. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 648 http://www.gjstx-e.cn/
For the ecosystem to be protected, for environmental aspects to be protected, and for the values
of each species on earth to be understood, there must be biological variety (Ehrlich and Wilson,
1991). The wide variety and quantity of the fish flora are reflected in the numerous species of
fish that can be found in rivers. Fish are commonly consumed as food, which gives them a
significant economic and animal kingdom significance. They are essential in helping
underdeveloped nations that lack protein. Fisheries are important because they give people a
lot of well-paying jobs and a decent source of animal protein. Inland freshwater resources in
India include lakes that are both natural and man-made, rivers, estuaries, and estuaries
(Koushlesh et al., 2021).
India is second in the world for aquaculture production and third for fish production. The blue
revolution in our nation demonstrated the value of the aquaculture and fisheries industries.
These industries, which are regarded as emerging ones, are crucial to the national economy.
Fishing in India has recently undergone a significant transition from being primarily marine to
being primarily inland. A change in inland fisheries from capture to culture-based fishing has
created new opportunities for the blue economy and job creation.
The values of each species on Earth and the health of the overall ecosystem are protected by
biodiversity, which is a component of the abiotic and biotic systems that make up ecosystems.
The fishing industry contributes significantly to the creation of jobs and gives fish farmers a
sizable income. The Indian fisheries industry has recently made a significant shift from sea to
inland fisheries. Many researchers, including those involved in the Blue Revolution in our
nation, have demonstrated the significance of fisheries for a variety of fish species (Bakhtiyar
et al., 2017; Koundal et al., 2016; Mozumder and Naser, 2009).The FAO motto is "Fish for
Man First and then for Animals and Plants." which might be implemented for the Indian fishing
industry's improved growth and development. There are new opportunities for research and
development, such as biotechnological advancements in the usage of fish and fish-related
aquatic animals and plants. Knowing the contents of a fish's gut is the only way to determine
what it eats and how it feeds. Fish species that can be successfully farmed require knowledge
of their natural diets and feeding behaviours. Studying the diet and feeding habits of freshwater
fish is a worthwhile research project since it provides the framework for effective fish
management programmes. With regard to weight, length, complete morphometric and meristic
characteristics, as well as GASI and RLG, the present study's objective is to monitor the food
and feeding behaviours of six distinct fish species.
3. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 649 http://www.gjstx-e.cn/
Food is essential for all organisms' growth, development, survival, and existence. It is well
known that the diet and feeding patterns of fish vary throughout their life cycle. The food
preferences of fish are heavily influenced by the type of food available in their habitat,
environmental conditions, the size or sexual maturity of the fish, and interspecific
competition1. RGL has been used extensively to identify herbivorous, carnivorous,
omnivorous, herbi-omnivorous, and carni-omnivorous feeding habits (Dasgupta M. 2002.).
Ga.SI was utilized to determine the foraging intensity of fish country (Rawat and Nautiyal
1995,: Mitra eta al, 2006). During the present investigation, both RGL and Ga.SI were used to
determine the feeding behavior and intensity of hill stream fishes of various sizes. The
population of these fishes is declining in freshwater upland streams due to several
anthropogenic factors that disrupt food chains and webs and may pose a threat. A review of the
literature revealed that a number of researchers have examined the dietary characteristics and
feeding habits of fish from various parts of the country (Rawat and Nautiyal 1995,: Mitra eta
al , 2006) Thus, the present study aims to add the knowledge of feeding biology of economically
important fish species like Tor putitora (Hamilton, 1822) (Ham.), Schizothorax richardsonii
(Gray, 1832) Oreochromis niloticus (Linnaeus, 1758), of Labeo rohita (Hamilton, 1822) and
Sperata seenghala (Sykes, 1839) that can be a useful indicator of modified environments.
MATERIAL AND METHODS:
Study Area
Himachal Pradesh is located in the north-western Himalayas with an elevation range of 320 to
7000 metres above mean sea level (Sharma, 2018). According to Kumar et al. (2007), the
drainage from snowmelt, rainfall, and glacier melt is combined to form the Himalayan Rivers.
Himachal Pradesh is fortunate to have a vast freshwater drainage system that primarily consists
of the five major rivers Beas, Sutlej, Ravi, Chenab, and Yamuna (Kumar & Khanna, 2014).
The extensive Sindhu River drainage system includes the Beas River as a tributary. The Beas
river originated from Beas Kund which is situated near to Rohtang pass in Kullu district (Ncube
et al., 2018). Its originated from the Dhauladhar range of great Himalayas at an altitude of 4062
meter (Sharma and Dhanze, 2011).Beas mainly flows through the four districts including
Kullu, Mandi, Hamirpur and Kangra. Total area covered by beas river is 460 km and it covers
256 km area in the state.
4. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 650 http://www.gjstx-e.cn/
Kandapatan (Mandi):
There is a historical temple of neelkanthmhadev and smelamata at Kandapattan. This place is
also called HarkiPauri. Pandva’s passed sometime of agyat vas at this place. Our ancestors used
cremate dead bodies on the bank of Beas River. Most of the people come to “LaghuHaridwar”
to take a dip into this holy river.
Pong Dam Bhaghlar (Kangra):
Pong dam reservoirs located in the district Kangra, is one of the largest manmade Reservoirs
in Himachal Pradesh. The catchment area of reservoir is 12560 km2
. Commercial fishing was
introduced by the Fisheries Department of H.P soon after the formation of pong reservoir. This
creates, a lot of fishermen who had no other reliable source of income.
Fig. 1: Map of selected sites (It shows the particular sites for collecting fish samples)
A B
Z2
Z1
D
C
5. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 651 http://www.gjstx-e.cn/
Table1: Geo-coordinates of selected sites
S. No. Location
Geo-Coordinates
Latitude Longitude
1 Mandi (Kandapattan) N31֯51'18.45288´´ E 76֯45ˈ15.95124´´
2 Kangra (Bhaghlar, Pong
dam)
N 32.09170694֯ E 75.97627004֯
SAMPLING PROGRAMME AND PROCEDURE
Collection of specimens
Random sampling has been done at different sites of Beas River and its tributaries preferably
at mid da hours, during the year 2022-2023 (Table-3.1). Fishes were collected from the
sampling zone from the Beas river with the help of cast net from two sites kandapattan (site-
1) in Mandi district and with special permission of fisheries officer at Baghlar pong dam (site-
2) with the help of gill net.
Dissection and Analysis of stomach Contents
The collected fish specimens were kept inside the ice boxes with some ice packs and
transported immediately within 8-12 hours to University laboratory for further biometric
analysis, gut dissection and feeding habit analysis. Immediately after the dissection gut content
is taken into a vials for the content preservation 10% formalin is used. Liquid drop method is
used to know the food present in the gut of six different fishes.
6. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 652 http://www.gjstx-e.cn/
Fig. 2: Flow chart of practical work
Analytical methods
Relative length of gut, Gastro-somatic index and Frequency of occurrence method were used
for analysing the food items (Fig 2).
Relative length of gut
The Relative length of gut is helpful to determine the feeding nature of fish. Longer the
length of gut of fish respective to their total body length higher the chances of herbivorous
nature of fish and shorter the length of gut of fish respective to body length the chances of being
carnivores nature increases. Omnivorous fishes gut length is relatively intermediate to both of
the Herbivores and Carnivores fishes.
The RLG was estimated by usual method (Al-Hussaini, 1949)
Gastro-somatic index
RLG =
Length of entire alimentary canal
Total length of fish in fresh condition
The level of feeding is referred to as feeding intensity, and it is reflected in how full the
stomach appears to be. It changes according to the food's availability, the time of year, and
the fish's mature level. The GaSI was estimated by following standard formula
7. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 653 http://www.gjstx-e.cn/
GaSI =
Total weigth of canal of fish food
weight of the fish
× 100
Gastro-somatic Index shows great variation in both of sexes as well as in various fish species.
GaSI is good indicator of reproductive activity and spawning season is also determined by an
association of frequency of the distribution of gonadal maturity and GaSI. It is minimum during
the breeding season and maximum during post-spawning period (Bhatnagar and
Karamchandani, 1970).
Frequency of occurrence method
In this present study number method is used. This method is based on the counts of food items
in gut and this method is relatively faster than others. The difference of size is not considered
in this method (Hynes, 1950).
%Oi =
Ni
× 100
N
Where% Oi shows the proportion of all food items.
Ni is the quantity of a specific food item.
N is the total amount of food items in the intestine.
Numerous researchers have employed this technique with effectiveness to study fish feeding
habits.
Analysis of the gut content under the digital microscope
We removed, weighed, and measured the digestive systems from the preserved specimens.
Freshwater-filled petri plates were used to collect the intestinal contents. Liquid drop
analysis was used to examine the gut's contents. Simple microscope and digital light
microscope are used to determine whether the gastrointestinal content is phytoplankton,
zooplankton rich, or water bug larvae. With the use of Sedge-wick rafter cells, all the food
items were inspected under a stereomicroscope (100-400X) and classified to the lowest
taxonomic level possible (Needham & Needham, 1962). Macro-organisms like insect larvae
and fish larvae are identified using stereomicroscopes and digital microscopes.
Data handling and statistics
Excel was used to manage the acquired data, and tables and graphs were created after
calculations were performed using MS Excel's statical methods. With the use of a computer
and Excel, the obtained data was processed to determine the mean and standard deviation.
8. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 654 http://www.gjstx-e.cn/
Graphical presentation: Based on the inquiry, many graph types were used to illustrate the data.
For the presentation of the data, various graphs including bar, column, line, area, and pie charts
were chosen.
RESULTS and DICUSSION
Table 2: Monthly qualitative and quantitative feeding variations of Tor putitora (Hamilton,
1822) of Beas River
Month
Macrophytes
(%)
Blue-
green
algae
(%)
Diatoms
(%)
Insect
(%)
Miscellaneous
(%)
Digested
food (%)
November 2.6 5.1 10.7 8.4 3.5 69.7
December 2 5.5 9.2 5.3 8 70
January 2.7 6.1 7.4 4.2 4.6 75
February 2.5 3.7 11.5 7.6 4.7 70
March 3 4.4 8.1 4.8 4.7 75
April 2.5 5.7 9.2 8.5 7.6 66.5
Table 3: Monthly qualitative and quantitative feeding variations of Schizothorax richardsonii
(Gray, 1832) of Beas River
Month
Diatoms
(%)
Blue-
green
algae
(%)
Green
filamentous
algae (%)
Detritus
(%)
Sand
(%)
Digested
food (%)
November 17.7 6.8 10.6 4.6 5.3 55
December 10.5 7.2 8.5 1.5 2.3 70
9. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 655 http://www.gjstx-e.cn/
January 10.9 5.5 2.5 1.9 3.2 76
February 11.5 6.9 5.4 3.3 2.9 70
March 10.5 4.2 4.2 1.4 4.7 75
April 12.6 5.9 8.8 5.9 6.8 60
Table 4: Monthly qualitative and quantitative feeding variations of Oreochromis niloticus
(Linnaeus, 1758) of Beas River.
Month
Diatoms
(%)
Blue-
green
algae
(%)
Green
filamentous
algae (%)
Detritus
(%)
Sand
(%)
Digested
food (%)
November 16.3 7.4 26.3 2 3 45
December 13 6 20 5 3 53
January 9 2 18 4 2 65
February 9.7 5.7 9.5 7.1 2 66
March 5.68 4.73 9.59 4 3 73
April 11.5 1.7 11.7 2.1 3 70
Table 5: Monthly qualitative and quantitative feeding variations of Labeo rohita (Hamilton,
1822)of Beas River.
Month
Diatoms (%) Green filamentous
algae (%)
Insect
(%)
Digested food
(%)
November 19.9 9.9 20.2 50
December 19 10.24 8.46 62.3
January 11.8 8.99 6.21 73
10. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 656 http://www.gjstx-e.cn/
February 25 20 8 47
March 18 6 15 61
April 20.4 3 10.6 66
Table 6: Monthly qualitative and quantitative feeding variations of
Glyptothorax pectinopterus (McClelland, 1842) of Beas River
Month
Fragments of
plankton
particles (%)
Insect
larvae (%)
Zooplankton
(%)
Digested food
(%)
November 16 21.4 7.6 55
December 23.5 19.2 4.7 52.6
January 18 28.4 6.2 47.4
February 13.5 27 7.5 52
March 16.5 23.2 6.5 53.8
April 14.5 19.2 11.4 54.9
Table 7: Monthly qualitative and quantitative feeding variations of Sperata seenghala
(Sykes, 1839) of Beas River.
Month
Insect
(%)
Planktons
(%)
Fish Larvae
(%)
Digested food
(%)
11. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 657 http://www.gjstx-e.cn/
November 18.6 12.22 14.18 55
December 21.35 11.5 17.15 50
January 13.5 8.5 15 63
February 7 12 16 65
March 8.28 12.22 15.5 64
April 10 13 25 52
Table 8: Feeding habit of six freshwater fishes
Fish name Fish Family RLG Feeding Habit Habitat
Schizothoraxrichardsonii Cyprinidae High Herbivorous Bottom
feeder
Oreochromisniloticus Cichlidae High Herbivorous Bottom
feeder
Sperataseenghala Bagridae Less Carnivorous Bottom
feeder
Tor putitora Cyprinidae medium Omnivorous Column
feeder
Glyptothoraxpectinopterus Sisoridae less Carnivorous Bottom
feeder
Labeorohita Cyprinidae High Herbivorous Column
feeder
12. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 658 http://www.gjstx-e.cn/
Fig 3:RLG and GaSI relationship of Glyptothoraxpectinopterus
Fig 4: RLG and GaSI relationship of Tor putitora
1 7
0.95 6
5
0.9
4
0.85
3
0.8
2
0.75 1
0.7 0
November December January February March April
RLG GaSI
1.4 2.5
1.2
2
1
0.8 1.5
0.6 1
0.4
0.5
0.2
0 0
November December January
RLG
February
GaSI
March April
13. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 659 http://www.gjstx-e.cn/
Fig 5:RLG and GaSI relationship of Schizothoraxrichardsonii
9 9
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
0
November December January February March April
0
RLG GaSI
Fig 6: RLG and GaSI relationship of Oreochromisniloticus
2.4 4.5
2.3
4
3.5
2.2
3
2.1 2.5
2 2
1.5
1.9
1
1.8
0.5
1.7 0
November December January
RLG
February
GaSI
March April
14. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 660 http://www.gjstx-e.cn/
Fig 7:RLG and GaSI relationship of Labeorohita
Fig 8: RLG and GaSI relationship of Sperataseenghala
While studying the food and feeding behaviour of fish species different food items obtained
from the stomach gives a clear image of the diet preference of fish. In this study, both
quantitative and qualitative methods were used to stomach content analysis. Hynes (1950), tells
about the quantitative and qualitative analysis of gut content. The qualitative analysis method
focuses on the identification of organisms with the help of a microscope which is present in the
gut (Table 2-8). Fishes are divided into carnivorous, omnivorous and herbivorous based on
their feeding habit. In this study, we have selected six freshwater fishes from two different
ecological zones. Out of six fishLabeorohita, Schizothoraxrichardsonii, Oreochromisniloticus
were found as Herbivorous and Tor putitora as omnivorous and
10
9
8
7
6
5
4
3
2
1
0
6
5
4
3
2
1
0
November December January February March April
RLG GaSI
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
10
9
8
7
6
5
4
3
2
1
0
November December January February March April
RLG GaSI
15. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 661 http://www.gjstx-e.cn/
another two GlyptothoraxpectinopterusandSperataseenghala as Carnivorous in nature based
on their RLG values (Fig.3-8). The selected specimen includes herbivorous, carnivorous and
omnivorous which can make a clear difference among the natural feeding behaviour of
freshwater fishes. Rohu gut analysis shows that fish was essentially Herbivorous. The relative
length of the L. rohita fish's gut (RLG) was greater than its total body length, indicating that it
is a herbivore. Similar work has been done by Kaur et al., (2018) The presence of a wide range
of food items from many biological niches in the gut of L. rohita, together with a greater level
of phytoplankton, clearly indicates that the fish is a column feeder(Kaur et al., 2018). A lot of
fisheries specialists concluded that the freshwater fish Labeorohita is primarily herbivorous
(Bhatnagar and Karamchandani, 1970; Majumder et al., 2018; Masram et al., 2022; Mozumder
and Naser, 2009; Mukherjee et al., 2011). Sperataseenghalafish was concluded Carnivorous,
especially Piscivorous. The relative length of the gut of Sperataseenghala fishes was found to
be shorter than the total body length. Several researchers have reported that the Column feeders
include adults of Sperataseenghala predatory in nature. Carnivorous feeding habits have been
reported by the majority of researchers (Begum et al., 2008; Gupta, 2015; Gupta and Banerjee,
2014; Saini et al., 2008; Sehgal, 1967).
In the present study, Schizothoraxrichardsoniifish was concluded Herbivorous. The relative
length of the gut is triple its body length. Similarly, (Sabha et al., 2017) concluded that fish
from the schizothoracic family are highly prized and outnumber most other fish species. They
eat debris, plants that are adhered to rocks and stones (including algae), and the invertebrate
fauna that lives nearby. According to research, Schizothrax sp. are herbivorous fish that mostly
consumes green algae, plant fragments, diatoms, detritus, and strange materials like fish scales
and ropes. Analysis of stomach fullness showed that May through August had the highest
feeding intensity, while November and December had the lowest feeding levels (Sabha et al.,
2017; Sharma and Dhanze, 2011). Tor Putitora fish was concluded Omnivorous. The relative
length of the gut compared to its total body length is medium. Similar results were found by
(Kishore et al., 2011), the fingerlings showed a greater degree of omnivorous propensity based
on the percentage content of their meal. However, RLG values (0.42-21.11) suggested that they
tended to be carnivorous. The sexually immature and juvenile people were discovered to be
carnivorous. In older age groups (6+), the omnivorous eating trend is still present. The RLG
values increased as fish length increased, showing that the fish's gut was suitable for an
omnivorous diet. According to the majority of researchers,
16. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 662 http://www.gjstx-e.cn/
the Golden Mahseer is an omnivorous animal, which is consistent with our findings in the
current study (Bhatt and Pandit, 2016; Johal et al., 2005; Johnsingh et al., 2006; Kishore et al.,
2011; Shahi et al., 2014; Shrestha, 1994).
In the present study, Oreochromisniloticus fish was concluded Herbivorous. The relative length
of gut fish is higher in comparison to the body length. A similar result was found by Getachew,
(1987), According to Getachew, (1987), In the case of Oreochromisniloticus which is
Herbivorous in nature. The most nutritionally significant algae are blue-green ones, which were
particularly prevalent in the diet from November to February when it was dry. Fish food quality
may be affected by seasonal variations in the algal species' makeup. According to (Dempster
et al., 1993) study on a quantitative comparison of young Oreochromisniloticus grazing
behaviour on the planktonic cyanobacteria Microcystisaeruginosa and a periphytic community
dominated by the cyanobacteria Oscillatoria sp. revealed that the biomass ingestion rates of
fish filter-feeding on planktonic cyanobacteria were markedly lower than those of fish surface-
grazing on periphyton(Dempster et al., 1993; Getachew, 1987). These studies support that the
Oreochromisniloticusis herbivorous freshwater fish as experimentally observed in the present
study.
In the present study, Glyptothoraxpectinopterus contains a small relative gut compared to its
total body length and is concluded as Carnivorous. The feeding behaviour is bottom-feeding
and carnivorous by nature. This species consumes benthos and zooplankton and spends the
majority of its time burrowing below the gravel bottom, but it occasionally rises to the surface
after heavy rain, when the catch is higher. Our observations demonstrate that the fish are
dependent on insect larvae and zooplankton. Since the Glyptothoraxpectinopterus has a small
relative gut compared to its total body length our findings are in opposition to (Singh et al.,
2015) Whereas (Das et al., 2021; Sinha et al., 1990) researchers were in support of our findings
that the Glyptothoraxsp. is carnivorous.
Conclusion
The knowledge of food and feeding behaviour has opened a new way to enhance the culturing
of the same fishes in captivity areas. Variation in food preferences and composition of food
items in the gut of selected fish species is related to fish feeding habitat also the nutritional
values of fishes depend upon their food type. The gut content analysis in the present study
determined that the species Tor putitorais an omnivorous fish, and
17. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 663 http://www.gjstx-e.cn/
Fragillaria sp. and Cyclops sp. were dominantly found in the gut of Tor putitora. However,
Schizothorox richardsonii is herbivorous. In Beas River (a cold water hillstream river),
Schizothoroxrichardsonii is found to be a periphytonic feeder that feeds on Bacillariophyceae,
Chlorophyceae, Cyanophyceae, detritus, and sand in this order of preference and Naviculasp is
dominated in its gut. Sperataseenghala is fully carnivorous and majorly feeds on its larvae,
LabeoRohita is also found to be Herbivorous with some traces of Cyclops in their gut,
Oreochromisniloticus sp. feeds on large fragments of leaves and other phytoplankton and is
considered as Herbivorous fish. Due to its ability to digest the cellulose because of its gut
micro-biota this fish number increases in the Pong Dam reservoir at a higher rate, Glyptothorax
pectinopterus is carnivorous due to its feeding habits and its reliability on the larvae of insects.
It works as a bio-indicator and provided information that there is plenty of biodiversity to
support fishes in the Beas River. Fish with an empty stomach was not observed which means
that Beas River provides a good abundance of food item that is consumed by the fishes and is
considered as one of the natural freshwater streams which support a huge freshwater flora-
fauna diversity. Due to the great reliance on this species by people for food, the presence of
Schizothorax richardsonii fish species in the Beas River is declining. Because Brown trout and
Snow trout occupy the same biological niche, the introduction of these invasive species and
their culture poses a serious threat to Snow trout. Glyptothorax pectinopterus has minor fishery
value due to its small size. Construction of Dams, the Introduction of untreated municipality
waste and market waste directly into the Beas River were the main cause of the depletion of
Glyptothorax pectinopterus from snow-fed rivers like Beas. Conservation methods should be
made to conserve the fish population by setting up hatcheries along water streams, water
pollution should be controlled and the minimum size of fish catchable should be laid
down.Sperata seenghala, Labeo rohita and Oreochromisniloticusare food fishes and have high
nutritional value there is a good number of fish caught in these fishes. The Labeorohita is
observed as herbivorous, Sperata seenghala as Piscivorous (Carnivorous) and Oreochromis
niloticus is essentially Herbivorous. Oreochromis niloticus and Labeo rohita were considered
as most dominant fishes in the pong dam in this study. The high protein and fat content of
natural diets help fish flourish. To boost fish growth, it is therefore required to increase the
amount of live food in the aquatic ecosystem. In the modern closed type of Fisheries approaches
such as Recirculatory Aquaculture systems and Biofloc technology systems natural food boost
fish growth and Immunity and reduces the chances of diseases and infections. Knowledge of
natural food can
18. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 664 http://www.gjstx-e.cn/
be used to feed the fish in hatcheries where the fish brood is prepared. The results of this study
will aid in formulating fish feed following natural food preferences and feeding habits.
Acknowledgements- Authors duly acknowledge the Central University of Himachal Pradesh
for providing facilities to carry out the work.
Authors Contribution: RK, KT- Conceptualization, KT, MG - Original draft preparation,
MG, DM- Methodology, Data analysis, KT,RK - Reviewing and editing, all authors have read
and agreed to the published version of the manuscript.
Competing Interest: The authors declare no competing interest
References
Al-Hussaini, A., 1949. On the functional morphology of the alimentary tract of some fish in
relation to differences in their feeding habits: anatomy and histology. Journal of cell
Science 3, 109–139.
Bakhtiyar, Y., Langer, S., Karlopia, S.K., Chalotra, R.K., 2017. Studies on the feeding habits
of Labeo rohita (Ham.) from Gho-Manhasa fish ponds, Jammu, North India. Journal of
Ecophysiology and Occupational Health 17, 40–49.
Begum, M., Alam, M., Islam, M., Pal, H., 2008. On the food and feeding habit of an estuarine
catfish (Mystus gulio Hamilton) in the south-west coast of Bangladesh. University journal
of zoology, Rajshahi University 27, 91–94.
Bhatnagar, G., Karamchandani, S., 1970. Food and feeding habits of Labeo fimbriatus
(Bloch) in river Narbada near Hoshangabad (MP). J. Inland Fish. Soc. India 2, 30–50.
Bhatt, J.P., Pandit, M.K., 2016. Endangered Golden mahseer Tor putitora Hamilton: a review
of natural history. Reviews in Fish Biology and Fisheries 26, 25–38.
Das, D., Chakraborti, S., Nag, T.C., 2021. Morphology of adhesive surfaces in the sisorid
catfish, Glyptothorax sinense sikkimensis. Indian Journal of Biochemistry and Biophysics
(IJBB) 58, 385–393.
Dempster, P., Beveridge, M., Baird, D., 1993. Herbivory in the tilapia Oreochromis niloticus:
a comparison of feeding rates on phytoplankton and periphyton. Journal of Fish Biology
43, 385–392.
19. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 665 http://www.gjstx-e.cn/
Ehrlich, P.R., Wilson, E.O., 1991. Biodiversity studies: science and policy. Science 253, 758–
762.
Getachew, T., 1987. A study on an herbivorous fish, Oreochromis niloticus L., diet and its
quality in two Ethiopian Rift Valley lakes, Awasa and Zwai. Journal of fish Biology 30,
439–449.
Gupta, S., 2015. Review on Sperata seenghala (Sykes, 1839), a freshwater catfish of Indian
subcontinent. J Aquac Res Development 6, 2.
Gupta, S., Banerjee, S., 2014. Food and feeding habit of a freshwater catfish, Mystus tengara
(Siluriformes: Bagridae). Journal of ichthyology 54, 742–748.
(https://dof.gov.in/inland-fisheries#)., n.d.
Hynes, H., 1950. The food of fresh-water sticklebacks (Gasterosteus aculeatus and Pygosteus
pungitius), with a review of methods used in studies of the food of fishes. The journal of
animal ecology 36–58.
Johal, M., Negi, R., Onkar, S., 2005. Length-weight relationship of golden mahseer Tor
putitora (hamilton) from pong dam reservoir, himachal pradesh. Uttar Pradesh Journal of
Zoology 85–88.
Johnsingh, A., Negi, A., Mohan, D., 2006. Golden mahseer conservation in Uttaranchal.
Cheetal 43, 9–17.
Kaur, A., Datta, S.N., Tewari, G., 2018. Study on biometrics and biology of Rohu, Labeo
rohita from Harike wetland-Ramsar site. Journal of Entomology and Zoology Studies 6,
496–500.
Kishore, B., Bhatt, J., Rawat, V., Nautiyal, P., 2011. Variations in food habit of the
Himalayan mahseer-Tor putitora (Ham.) inhabiting the Ganga river system in Garhwal
region.
Koundal, S., Koundal, A., Sharma, I., Dhanze, R., 2016. Mouth morphometry and body
lengths with respect to the feeding habits of Hill stream fishes from Western Himalaya
HP (India). International Journal of Fisheries and Aquatic Studies 4, 346–356.
20. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 666 http://www.gjstx-e.cn/
Koushlesh, S., Sajina, A., Roshith, C., 2021. Ichthyofaunal diversity of the major Indian
rivers: A review. J. Inland Fish. Soc. India 53, 22–35.
Kumar, V., Singh, P., Singh, V., 2007. Snow and glacier melt contribution in the Beas River
at Pandoh dam, Himachal Pradesh, India. Hydrological sciences journal 52, 376–388.
Majumder, S., Majumdar, N., Ghosh, P., Saikia, S.K., Saha, S.K., 2018. Rohu Labeo rohita
(Hamilton, 1822) changes feeding strategy throughout its ontogeny An explanation from
feeding ecology. IJSRBS 5, 92–96. https://doi.org/10.26438/ijsrbs/v5i4.9296
Malami, G., Ipinjolu, J., Hassan, W., Magawata, I., 2004. Feeding adaptations of ten fish
species in river Rima, North Western Nigeria. Presented at the A paper presented at the
2004 Annual conference of Zoological Society of Nigeria held at the Institute of
Developmental Research, Ahmadu Bello University, Zaria, p. 115.
Masram, V., Singh, P., Datta, S., Tewari, G., 2022. Length weight relationship and condition
factor of Labeo rohita (ham.) collected from domesticated and riverine habitats. Indian
Journal of Ecology 49, 869–872.
Mozumder, P.K., Naser, M.N., 2009. Food and feeding habit of catla (Catla catla Ham.), Rui
(Labeo rohita Ham.) and Catla–Rui hybrids. Bangladesh J. Zool 37, 303–312.
Mukherjee, S., Parial, D., Khatoon, N., Chaudhuri, A., Senroy, S., Homechaudhuri, S., Pal,
R., 2011. Effect of Formulated Algal Diet on growth performance of Labeo rohita
Hamilton. J. Algal. Biomass Utln 2, 1–9.
Ncube, S., Beevers, L., Adeloye, A.J., Visser, A., 2018. Assessment of freshwater ecosystem
services in the Beas River Basin, Himalayas region, India. Proceedings of the
International Association of Hydrological Sciences 379, 67–72.
Sabha, K., Najar, A., Bhat, F., Shah, T., Balkhi, M., Faisal, R., 2017. Food and feeding habits
of snow trout (Schizothorax niger) inhabiting Nigeen Lake, Kashmir. Journal of
Experimental Zoology, India 20, 635–637.
21. High Technology Letters ISSN NO : 1006-6748
Volume 30, Issue 4, 2024 667 http://www.gjstx-e.cn/
Saini, A., Dua, A., Mohindra, V., 2008. Comparative morphometrics of two populations of
giant river catfish (Mystus seenghala) from the Indus river system. Integrative Zoology 3,
219–226.
Sehgal, P., 1967. Food and feeding habits of Mystus seenghala Sykes. Research Bulletin of
the Panjab University Science 18, 149–155.
Shahi, N., Mallik, S.K., Sarma, D., 2014. Golden mahseer, Tor putitora—a possible candidate
species for hill aquaculture. Aquac Asia 14, 22–28.
Sharma, I., 2018. Status of trout fishes versus climate change in Himachal Pradesh, North
Western Himalaya. Link: https://bit. ly/3cvcMjw.
Sharma, I., Dhanze, R., 2011. Length-weight relationship of Schizothorax richardsonii (Gray)
from Indus (beas river system, HP) India. Records of the Zoological Survey of India 111,
63–70.
Shekhar, C., Malhotra, Y., Dutta, S., 1993. Food and feeding habits of Schizothorax
richardsonii (Gray and Hard) inhabiting Neeru nullah, Bhaderwah, Jammu. Journal of the
Indian Institute of Science 73, 247.
Shrestha, T., 1994. Migration and spawning of golden mahseer in Himalayan waters of
Nepal. Journal of Freshwater Biology 6, 71–77.
Singh, R., Akhtar, S., Pandey, N., Mir, J., Sharma, N., 2015. Threatened Fishes of the World:
Glyptothorax kashmirensis (Hora, 1923)(Siluriformes: Sisoridae) a mini review. Journal
of Fisheries and Livestock Production 3, 147.
Sinha, A.K., Singh, I., BR, S., 1990. The morphology of the adhesive organ of the sisorid
fish, Glyptothorax pectinopterus. Japanese Journal of Ichthyology 36, 427–431.