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.
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.
Aquatic weeds diversity of Bangladesh Agricultural University Campus, Mymensi...AbdullaAlAsif1
A study was conducted to find out the biodiversity of aquatic weeds of Bangladesh Agricultural University Campus Mymensingh from January to May, 2016. A total of 39 weed species were identified from the area. Among four common groups of weeds, five species of floating weeds: Eichhornia crassipes, Pistia stratiotes, Azolla pinnata, Lemna minor, Spirodela polyrrhiza, 22 species of emergent weeds: Alternanthera philoxerodies, Ipomea aquatica, Polygonum glabrum, Sagittaria spp., Oxalis corniculata, Marsilea quadrifolia, Commerlina bengalensis, Commelina appendiculata, Ipomea carnea, Nymphaea rubra, Nymphaea nauchali, Leersia hexandra, Scirpus mucronatus, Ludwigia adscendens, Enhydra fluctuans, Trapa natans, Colocasia esculenta, Hygrorayza aristata, Ipomoea spp., Nymphoides aquatica, Typha latifolia, Aponogeton spp., five species of submerged weeds: Hydrilla verticilata, Cartophyllum demersum, Vallisneria spiralis, Najas minor, Vallisnaria spp. and seven species of algae: Microcystis spp., Chara spp., Anabaena spp., Nitella spp., Spirogyra spp., Chlorella spp., Euglena spp. were identified. Various useful and harmful aspects of these weeds were also discussed.
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.
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
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.
Present status of Indian major carp broodstock management at the hatcheries i...AbdullaAlAsif1
The present study was carried out to access on the present status of Indian major carp broodstock management, suggests some guidelines to control negative selection and inbreeding in hatchery stocks in Jessore, Bangladesh. The survey was conducted in 20 hatcheries at Chacrha in Jessore from November, 2013 to October, 2014. Information showed that brood fish selection for induced breeding was done on the basis of their experience. The sources of brood fish were mainly own and other sources were Halda River, Padma River, Govt. brood bank, world fish center and BFRI. Feed ingredients used as rice bran (39%), mustard oil cake (29%), vitamin and mineral premix (3%), wheat flour (7%), fish meal (13%) and soyabean flour (5%). Nutritional compositions of feed were protein (20-30%), lipid (10-12%), carbohydrate (25-35%) and fat (7-11%). Fertilizer such as TSP (0.484 kg/decimal), urea (0.242 kg/decimal), cowdung (6.5 kg/decimal), poultry dropping (3 kg/decimal) and MP (0.181 kg/decimal) were used. Hatching rate was 85-91% and deformed hatchlings were 5-7% in the hatcheries. Both positive (63%) and negative (37%) selection were identified. Anchor worm (Lernaeasis) disease was the most harmful problem of which solution was not given by them. Hatcheries owners assumed that if they would use wild brood fish, inbreeding could be removed and thus survival and growth of fry could be increased.
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
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.
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.
Aquatic weeds diversity of Bangladesh Agricultural University Campus, Mymensi...AbdullaAlAsif1
A study was conducted to find out the biodiversity of aquatic weeds of Bangladesh Agricultural University Campus Mymensingh from January to May, 2016. A total of 39 weed species were identified from the area. Among four common groups of weeds, five species of floating weeds: Eichhornia crassipes, Pistia stratiotes, Azolla pinnata, Lemna minor, Spirodela polyrrhiza, 22 species of emergent weeds: Alternanthera philoxerodies, Ipomea aquatica, Polygonum glabrum, Sagittaria spp., Oxalis corniculata, Marsilea quadrifolia, Commerlina bengalensis, Commelina appendiculata, Ipomea carnea, Nymphaea rubra, Nymphaea nauchali, Leersia hexandra, Scirpus mucronatus, Ludwigia adscendens, Enhydra fluctuans, Trapa natans, Colocasia esculenta, Hygrorayza aristata, Ipomoea spp., Nymphoides aquatica, Typha latifolia, Aponogeton spp., five species of submerged weeds: Hydrilla verticilata, Cartophyllum demersum, Vallisneria spiralis, Najas minor, Vallisnaria spp. and seven species of algae: Microcystis spp., Chara spp., Anabaena spp., Nitella spp., Spirogyra spp., Chlorella spp., Euglena spp. were identified. Various useful and harmful aspects of these weeds were also discussed.
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.
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
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.
Present status of Indian major carp broodstock management at the hatcheries i...AbdullaAlAsif1
The present study was carried out to access on the present status of Indian major carp broodstock management, suggests some guidelines to control negative selection and inbreeding in hatchery stocks in Jessore, Bangladesh. The survey was conducted in 20 hatcheries at Chacrha in Jessore from November, 2013 to October, 2014. Information showed that brood fish selection for induced breeding was done on the basis of their experience. The sources of brood fish were mainly own and other sources were Halda River, Padma River, Govt. brood bank, world fish center and BFRI. Feed ingredients used as rice bran (39%), mustard oil cake (29%), vitamin and mineral premix (3%), wheat flour (7%), fish meal (13%) and soyabean flour (5%). Nutritional compositions of feed were protein (20-30%), lipid (10-12%), carbohydrate (25-35%) and fat (7-11%). Fertilizer such as TSP (0.484 kg/decimal), urea (0.242 kg/decimal), cowdung (6.5 kg/decimal), poultry dropping (3 kg/decimal) and MP (0.181 kg/decimal) were used. Hatching rate was 85-91% and deformed hatchlings were 5-7% in the hatcheries. Both positive (63%) and negative (37%) selection were identified. Anchor worm (Lernaeasis) disease was the most harmful problem of which solution was not given by them. Hatcheries owners assumed that if they would use wild brood fish, inbreeding could be removed and thus survival and growth of fry could be increased.
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
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.
A preliminary study of Ichthyofauna of Garhi Usmani Khel stream and Meherdy s...Innspub Net
Based on the importance and crucial role in biosphere, studying fish is a debatable issue. Among animal research its study is as prominent as bright day light. Biodiversity refers to the number of different species living in an ecosystem. The current study was carried out from May 2016 to August 2016 to find out Ichthyofauna of Garhi Usmani Khel Stream and Meherdy Stream at Dargai District Malakand, Khyber Pakhtunkhwa Pakistan. The fish specimens were then identified by studying various morphometric measurements and meristic counts. This study included eight species; Barilius pakistanicus, Puntius chola, Channa punctata, Channa gachua, Acanthocobitis botia, Crossocheilus diplocheilus, Mastacembelus armatus and Ompok pabda belonging to four orders (Cypriniformes, Channiformes, Mastacembeliformes, Siluriformes) and five Families (Cyprinidae, Channidae, Nemacheilidaeidae, Mastacembelidae, Siluridae). Cyprinidae was the most dominant family comprised of three species; Barilius pakistanicus, Puntius chola and Crossocheilus diplocheilus. The family Channidae included two species i.e. Channa punctate and Channa gachua while Nemacheilidaeidae, Mastacembelidae and Siluridae were represented by only one species each, Acanthocobitis botia, Mastacembelus armatus and Ompok pabda respectively. It was concluded that Ompok pabda is strictly endangered in River Swat and especially in Garhi Usmani Khel Stream and Meherdy Stream. It is strongly recommended to conserve this species (Ompok pabda).
The Diversity and Distribution of Rotifers in Two Selected Biotopes of Kanyak...ijtsrd
Rotifers are the free floating and microscopic animals found in all aquatic ecosystems. It is important for many of the fishes as they are used as the source of food. They are filter feeders that will eat dead materials, algae, and other microscopic living organisms, and are therefore very important components of aquatic food webs. Zooplankton are playing important role in biomonitoring of water pollution and rotifers exhibit complex patterns of diversity and distribution in freshwater because many species are cosmopolitan. The zooplankton community fluctuates according to the physicochemical parameters of the environment, especially rotifer species change with biotic factors. Zooplankton is heterotrophic and plays an important role in the food web by linking primary producers to higher trophic level. Kumaracoil temple tank and Suchindrum temple tanks are selected for present study and they were highly fertile freshwaters of Kanyakumari District. Zooplankton samples were collected by filtering 100 liter of water through a zooplankton net made up of bolting silk 35 µm mesh size. Brachionus falcatus, Brachionus caudatus, Brachionus angularis, Brachionus calyciflorus, Brachionus patulus, Brachionus quadridentatus, Brachionus forficula, Keratella tropica, Keratella procurva, Platias quadricornis, Brachionus donneri, Brachionus durgae, Keratella edmondsoni, Keratella lenzi, Platyias eloupi, Pseudoeuchlanis longipedes, Mytilina acanthophora, Macrochaetus longipes, Lepadella biloba, Lepadella dactyliseta, Lepadella eurysterna, Lecane braumi, Lecane eswari, Lecane lateralis, Lecane simonneae, Lecane sola, Lecane Monostyla anthinula, Lecane Monostyla bulla diabolica, Ascomorpha ecaudis, Trichocerca bicristata, Trichocerca iernis, Asplanchnopus bhimavaramensis species were identified. Most of the species identified are new to Kanyakumari District and some are new to Tamil Nadu. A. Sivaselva Rajan. | Renu, A. | Rinaldin Aroma, S. "The Diversity and Distribution of Rotifers in Two Selected Biotopes of Kanyakumari District, Tamil Nadu, India" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-7 , December 2022, URL: https://www.ijtsrd.com/papers/ijtsrd52383.pdf Paper URL: https://www.ijtsrd.com/biological-science/biotechnology/52383/the-diversity-and-distribution-of-rotifers-in-two-selected-biotopes-of-kanyakumari-district-tamil-nadu-india/a-sivaselva-rajan
Utilization of Multiple Habitat Sampling Protocol for Macroinvertebrates as Indicators of Water
Quality in Stream Ecosystem in Lawis,
Buruun, Iligan City
Effect of water parameters on temporal distribution and abundance of zooplank...AbdullaAlAsif1
Seasonal abundance of zooplankton in relation to different physico-chemical conditions of Kaptai lake has been studied. A total of four major groups of zooplankton were identified from study area of Kaptai lake during three seasons observation at pre-monsoon, monsoon and Post-monsoon. These four groups were categorized into rotifers, copepods, cladocerans and others (fish larvae, shrimp larvae, insects, mosquito larvae etc.). The mean abundance of group rotifers, copepods, cladoceras and others were 103, 84.67, 38.33 and 41.83 ind. L-1 respectively. The highest group was rotifers in terms of abundance and composition where compositions were recorded 38 % at three season's observation. The lowest group was cladoceras in term of abundance and composition where compositions were recorded 14 %. The air temperature, water temperature, transparency, water pH, DO, BOD5, PO 4-P, NO 2-N, SiO 3-Si, TSS, TDS, Alkalinity ranged between 21 and 27.5C, 23.5 and 31.5C, 0.8 and 3 m, 7.1 and 7.5, 5.72 and 8.58 mg/l, 8.55 and 12.87 mg/l, 3.22 and 4.13 µg/l, 0.992 and 1.19 µg/l, 161.18 and 201.15 µg/l, 0.28 and 0.48 g/l, 0.18 and 0.68 g/l, 40 and 60 ppm, respectively. Margalef richness index (d), Pielou's evenness index (J'), Shannon-Wiener diversity index (H'), Simpson dominance index (λ) are analyzed by Primer V6 software to quantify the collected species. Through same software SIMPER, Cluster analysis also done to compare similarity between season.
Species Diversity of Polychaete Worms from Some Selected Freshwater Environme...ijtsrd
The number of freshwater species in the world is quite small when compared with the vast number of marine species. There are several marine forms which are penetrated brackish and freshwater but remain unable to breed there while others have adapted sufficiently to remain for their entire life span. Polychaetes are commonly found in Indian estuaries, among 152 species recorded, 119 species from the east coast, 10 species from both east and west coasts. A total of 8 species were identified along Thenkasi District. Macro benthic polychaetes highlighted the presence of indicator species at all stations. Most of the benthic studies explored that Nereididae is the dominant species. The polychaetes observed throughout this study were a similar size and this is a clear indication of extreme disturbance imposed on the sediment. The present findings show macrobenthic polychaete diversity rich all along the Thenkasi District of Tamil Nadu. S. Balasubramanian | T. Citarasu | S. Lazarus | A. Renu "Species Diversity of Polychaete Worms from Some Selected Freshwater Environment of Thenkasi District, Tamil Nadu" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26516.pdfPaper URL: https://www.ijtsrd.com/biological-science/zoology/26516/species-diversity-of-polychaete-worms-from-some-selected-freshwater-environment-of-thenkasi-district-tamil-nadu/s-balasubramanian
Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bha...ijtsrd
The present study was conducted in Shahjangi Pond of Bhagalpur District of Bihar during April 2021 to March 2022. Zooplanktonic abundance and diversity were determined by using standard method. The principal aim of this study was to study more about the swamps overall zooplankton diversity. Water samples were collected using zooplankton net and preserved with formalin aqueous solution of formaldehyde and 5 neutral buffer 10 ml on the spot, then brought to the laboratory for further analysis. Totally 21 species of zooplankton of four different classes were recorded rotifer, cladocera, copepod and ostracoda in which Rotifera was the most dominant class followed by the cladocera, copepoda and ostracoda. From total 21 genera 10 were belongs to Rotifera, 6 from cladocera, 3 from copepoda and 2 from ostracoda. Shannon Weaver index were employed to analysis the species diversity. Priyama Kumari | Dr. Ashok Kumar Thakur "Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bhagalpur, Bihar (India)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-3 , April 2022, URL: https://www.ijtsrd.com/papers/ijtsrd49809.pdf Paper URL: https://www.ijtsrd.com/biological-science/zoology/49809/study-of-zooplankton-abundance-and-species-diversity-in-shahjangi-pond-of-bhagalpur-bihar-india/priyama-kumari
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Photosynthetic Pigments Content of Trapa Natans Specie in Skadar LakeIJEAB
Skadar lake is the largest lake in th Balkan Peninsula. The total area is 5500 m². Terretorialy the lake belong to Montenegro and to Albania. Both the sides of lake is a big development of acquatic vegetation, including a large variety of habitats and biological communities. The most important associations are Potameto-Najadetum, Trapetum natantis, Myriophyllo-Nupharetum, Nymphoideum peltata. These associations include lake shore macrophytes Najas, Vallisneria, Potamogeton, floating macrophytes Nuphar luteum, Trapa natans, Numphaea alba. Emersed water macrophytes are developed on both sides of lake predominantly in the eastern part of lake (Kamice Shegan) which go as far as 3 meter deep such Ceratophyllum, Najas marina, Najas minor, Vallisneria.Trapeum natantisi is largely widespread community in the Skadar lake. Waternuts develops wide population and communities in the inner and deeper part of the floating macrophyta zones. Plant samples were collected on the both sides of the lake. For Trapa natans specie is determined the content of photosynthetic pigments, chlorophyll a, chlorophyll b and carotenoids. Photosynthetic pigments were extracted with 80% acetone and their concentrations are expressed in mg/g dry absolutely leaf .Their measurement is made in the bands f 663, 645.470, of spectriphotometer. Trapa natans was found in the eastern shore and in western shore of Skadar lake. The highest values of chlorophyll a an b in the species Trapa natans was found in September 2014.
Evaluation of the Ichthyotoxicity of Dioscorea Dumetorum on the African Catfi...AJSERJournal
Dioscorea Dumetorumtubers are used in stupefying fish for easy harvesting in Akwa Ibom State, Nigeria
specifically in Annang part of the state. D. dumetorum belongs to the family of Dioscoreaceae and is commonly known
as bitter yam. This study was conducted to determine the bioactive components and evaluate the acutetoxicity of the
aqueous extract of the D. dumetorum on C. aariepinus fingerlings and anuran tadpoles. The 96hLC50 values of D.
dumetorum tuber aqueous extracts were determined in the laboratory under static bioassay conditions against C.
aariepinus fingerlings and anuran tadpoles. Range finding bioassays were conducted to get the range of concentrations
for the definitive bioassays. The range of concentrations of test media for C. aariepinus fingerlngs was 0.6-5mgl-1 while
that of anuran tadpoles was 1.6-3.8mgl-1
. The median lethal concentrations (LC50) were determined using probit
analysis. The 96hLC50 value of the test plant against exposed fingerlings was 2.153mgl-1 with lower and upper
confidence limits of 1.869 and 2.485mgl-1
respectively while that of tadpoles was 2.538mgl-1 with lower and upper
confidence limits of 2.295 and 2.771 mgl1
respectively. Unpaired t-test showed that there was no significant difference
(p>0.05) between the toxicity of the test plant to C. aariepinus fingerlings and that of anuran tadpoles. The mean water
quality parameters were within the optimal range requirement for the test species. The study indicated that D.
dumetorumexerted piscicidal property on C. aariepinus fingerlings and anuran tadpoles. The indiscriminate use of this
plant to catch fish by local fishermen should be discouraged.
Evaluation of the Ichthyotoxicity of Dioscorea Dumetorum on the African Catfi...AJSERJournal
Dioscorea Dumetorumtubers are used in stupefying fish for easy harvesting in Akwa Ibom State, Nigeria
specifically in Annang part of the state. D. dumetorum belongs to the family of Dioscoreaceae and is commonly known
as bitter yam. This study was conducted to determine the bioactive components and evaluate the acutetoxicity of the
aqueous extract of the D. dumetorum on C. aariepinus fingerlings and anuran tadpoles. The 96hLC50 values of D.
dumetorum tuber aqueous extracts were determined in the laboratory under static bioassay conditions against C.
aariepinus fingerlings and anuran tadpoles. Range finding bioassays were conducted to get the range of concentrations
for the definitive bioassays. The range of concentrations of test media for C. aariepinus fingerlngs was 0.6-5mgl-1 while
that of anuran tadpoles was 1.6-3.8mgl-1
. The median lethal concentrations (LC50) were determined using probit
analysis. The 96hLC50 value of the test plant against exposed fingerlings was 2.153mgl-1 with lower and upper
confidence limits of 1.869 and 2.485mgl-1
respectively while that of tadpoles was 2.538mgl-1 with lower and upper
confidence limits of 2.295 and 2.771 mgl1
respectively. Unpaired t-test showed that there was no significant difference
(p>0.05) between the toxicity of the test plant to C. aariepinus fingerlings and that of anuran tadpoles. The mean water
quality parameters were within the optimal range requirement for the test species. The study indicated that D.
dumetorumexerted piscicidal property on C. aariepinus fingerlings and anuran tadpoles. The indiscriminate use of this
plant to catch fish by local fishermen should be discouraged.
Qualitative and quantitative analysis of phytoplankton in culture pond of Noa...AbdullaAlAsif1
A study was conducted on qualitative and quantitative analysis of phytoplankton in cultured ponds of two fish farms of Noakhali district, Bangladesh from 15 September to 15 November 2012 to identify and estimate the abundance of phytoplankton in various culture ponds of two fish farms. Analyses of phytoplankton samples recorded a total of 4 classes phytoplankton viz.; Bacillariophyceae, Chlorophyceae, Cyanophyceae, Euglenophyceae. Out of 21 phytoplankton genera identified, 5 belong to Cyanophyceae, 7 to Chlorophyceae, 5 to Bacillariophyceae and 4 to Euglenophyceae. Among the identified genera, Euglena, Microcystis, Eurolena were found to be dominant genera. Total phytoplankton abundance was varied from 36×105 cells/L to 94.92×105 cells/L in the experimental ponds. Among all experimental ponds, Chlorophyceae was found dominant (44.4×105 cells/L). Second dominant group was Euglenophyceae (39.6×105 cells/L) observed in pond-1 of Bismillah Agro Production (BAP). Total phytoplankton densities were recorded 47.82×105cells/L and 51×105 cells/L in pond-1 and pond-2 of Subarna Agro Based Initiative (SABI) respectively. In BAP, total phytoplankton densities were recorded 94.92×105cells/L and 36×105 cells/L in pond-1 and pond-2 respectively. Management technique and water quality parameters were also studied during study period namely water temperature, conductivity, salinity, transparency, dissolve oxygen and pH. The present study reveals that phytoplankton species are variable among the culture ponds and their density is also variable. The information provides for more research to compare water quality and pond phytoplankton characteristics in earthen aquaculture systems with and without fish stocking. Further studies on the seasonal changes of water quality parameters and its effects on phytoplankton production in the fish ponds and all year extended monitoring is recommended in future studies.
Fish to finance: unraveling the economic threads of Bangladesh’s Blue EconomyAbdullaAlAsif1
Bangladesh, with its extensive river network, vast coastlines, and rich maritime heritage, stands at the crossroads of a transformative Blue Economy. This comprehensive review explores the rich tapestry of Bangladesh's maritime journey. Commencing with a historical lens, it traces the nation's roots in fisheries, showcasing its transformation into a diversified and dynamic Blue Economy. The significance of this transition unfolds across the review, underscoring the sector's contributions to GDP, employment, and food security, while candidly addressing challenges such as overfishing and environmental impact. This work not only chronicles historical milestones but distills valuable lessons from both successes and setbacks, offering a nuanced understanding of the economic resilience embedded in Bangladesh's fisheries sector. Beyond a historical retrospective, the review navigates through the contemporary landscape, emphasizing diversification beyond fisheries. It illuminates economic opportunities in maritime trade, explores non-fish marine resources, and delves into the transformative role of aquaculture. The policy framework governing Bangladesh's Blue Economy comes into focus, dissecting government strategies, legal landscapes, and international collaborations. The review also champions environmental sustainability, highlighting the impact of Blue Economy activities on marine ecosystems and advocating for conservation measures, thus positioning Bangladesh as a steward of its rich maritime heritage. Financial mechanisms and investments emerge as pivotal elements, shaping the trajectory of Blue Economy projects, as evidenced by case studies that weave success stories and lessons learned into the narrative. Concluding with a forward-looking perspective, the study identifies emerging trends, growth opportunities, and strategies to tackle challenges, offering a comprehensive roadmap for sustainable development. In weaving together economic vibrancy, environmental stewardship, and future aspirations, this review illuminates Bangladesh's maritime odyssey as a beacon for the global Blue Economy community.
Successful hybridization between Clarias microstomus♂ and Clarias gariepinus♀AbdullaAlAsif1
Hybridization is a significant approach to breeding that enables the creation of new varieties that enhance genetic diversity. Through fish inter-species hybridization, it is possible to produce hybrids that can be utilized in aquaculture and stocking programs to enhance growth rate, transfer desirable traits between species, and combine the favourable attributes of two parents into a single progeny. The present study revealed the successful hybridization between Clarias microstomus (Ng, 2001) ♂ and Clarias gariepinus (Burchell, 1822) ♀ for the first time in the aquaculture industry. C. microstomus is a species of Clariid catfish endemic to the island of Borneo and C. gariepinus is an introduced species widely aquacultured throughout the southeast Asian region. The embryonic development of the hybrid offspring is described with the hatching percentage of 58.63% and the early survival rate for the first 72 hours for the larvae of 85.76%. The hybrids showed no signs of deformities and developed normally. The findings of the study provide a new high yield variety of catfish for farmers and aquaculture industry for increasing production and profit margin.
More Related Content
Similar to Aquatic weeds diversity of Fatki River in Magura district, Bangladesh
A preliminary study of Ichthyofauna of Garhi Usmani Khel stream and Meherdy s...Innspub Net
Based on the importance and crucial role in biosphere, studying fish is a debatable issue. Among animal research its study is as prominent as bright day light. Biodiversity refers to the number of different species living in an ecosystem. The current study was carried out from May 2016 to August 2016 to find out Ichthyofauna of Garhi Usmani Khel Stream and Meherdy Stream at Dargai District Malakand, Khyber Pakhtunkhwa Pakistan. The fish specimens were then identified by studying various morphometric measurements and meristic counts. This study included eight species; Barilius pakistanicus, Puntius chola, Channa punctata, Channa gachua, Acanthocobitis botia, Crossocheilus diplocheilus, Mastacembelus armatus and Ompok pabda belonging to four orders (Cypriniformes, Channiformes, Mastacembeliformes, Siluriformes) and five Families (Cyprinidae, Channidae, Nemacheilidaeidae, Mastacembelidae, Siluridae). Cyprinidae was the most dominant family comprised of three species; Barilius pakistanicus, Puntius chola and Crossocheilus diplocheilus. The family Channidae included two species i.e. Channa punctate and Channa gachua while Nemacheilidaeidae, Mastacembelidae and Siluridae were represented by only one species each, Acanthocobitis botia, Mastacembelus armatus and Ompok pabda respectively. It was concluded that Ompok pabda is strictly endangered in River Swat and especially in Garhi Usmani Khel Stream and Meherdy Stream. It is strongly recommended to conserve this species (Ompok pabda).
The Diversity and Distribution of Rotifers in Two Selected Biotopes of Kanyak...ijtsrd
Rotifers are the free floating and microscopic animals found in all aquatic ecosystems. It is important for many of the fishes as they are used as the source of food. They are filter feeders that will eat dead materials, algae, and other microscopic living organisms, and are therefore very important components of aquatic food webs. Zooplankton are playing important role in biomonitoring of water pollution and rotifers exhibit complex patterns of diversity and distribution in freshwater because many species are cosmopolitan. The zooplankton community fluctuates according to the physicochemical parameters of the environment, especially rotifer species change with biotic factors. Zooplankton is heterotrophic and plays an important role in the food web by linking primary producers to higher trophic level. Kumaracoil temple tank and Suchindrum temple tanks are selected for present study and they were highly fertile freshwaters of Kanyakumari District. Zooplankton samples were collected by filtering 100 liter of water through a zooplankton net made up of bolting silk 35 µm mesh size. Brachionus falcatus, Brachionus caudatus, Brachionus angularis, Brachionus calyciflorus, Brachionus patulus, Brachionus quadridentatus, Brachionus forficula, Keratella tropica, Keratella procurva, Platias quadricornis, Brachionus donneri, Brachionus durgae, Keratella edmondsoni, Keratella lenzi, Platyias eloupi, Pseudoeuchlanis longipedes, Mytilina acanthophora, Macrochaetus longipes, Lepadella biloba, Lepadella dactyliseta, Lepadella eurysterna, Lecane braumi, Lecane eswari, Lecane lateralis, Lecane simonneae, Lecane sola, Lecane Monostyla anthinula, Lecane Monostyla bulla diabolica, Ascomorpha ecaudis, Trichocerca bicristata, Trichocerca iernis, Asplanchnopus bhimavaramensis species were identified. Most of the species identified are new to Kanyakumari District and some are new to Tamil Nadu. A. Sivaselva Rajan. | Renu, A. | Rinaldin Aroma, S. "The Diversity and Distribution of Rotifers in Two Selected Biotopes of Kanyakumari District, Tamil Nadu, India" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-7 , December 2022, URL: https://www.ijtsrd.com/papers/ijtsrd52383.pdf Paper URL: https://www.ijtsrd.com/biological-science/biotechnology/52383/the-diversity-and-distribution-of-rotifers-in-two-selected-biotopes-of-kanyakumari-district-tamil-nadu-india/a-sivaselva-rajan
Utilization of Multiple Habitat Sampling Protocol for Macroinvertebrates as Indicators of Water
Quality in Stream Ecosystem in Lawis,
Buruun, Iligan City
Effect of water parameters on temporal distribution and abundance of zooplank...AbdullaAlAsif1
Seasonal abundance of zooplankton in relation to different physico-chemical conditions of Kaptai lake has been studied. A total of four major groups of zooplankton were identified from study area of Kaptai lake during three seasons observation at pre-monsoon, monsoon and Post-monsoon. These four groups were categorized into rotifers, copepods, cladocerans and others (fish larvae, shrimp larvae, insects, mosquito larvae etc.). The mean abundance of group rotifers, copepods, cladoceras and others were 103, 84.67, 38.33 and 41.83 ind. L-1 respectively. The highest group was rotifers in terms of abundance and composition where compositions were recorded 38 % at three season's observation. The lowest group was cladoceras in term of abundance and composition where compositions were recorded 14 %. The air temperature, water temperature, transparency, water pH, DO, BOD5, PO 4-P, NO 2-N, SiO 3-Si, TSS, TDS, Alkalinity ranged between 21 and 27.5C, 23.5 and 31.5C, 0.8 and 3 m, 7.1 and 7.5, 5.72 and 8.58 mg/l, 8.55 and 12.87 mg/l, 3.22 and 4.13 µg/l, 0.992 and 1.19 µg/l, 161.18 and 201.15 µg/l, 0.28 and 0.48 g/l, 0.18 and 0.68 g/l, 40 and 60 ppm, respectively. Margalef richness index (d), Pielou's evenness index (J'), Shannon-Wiener diversity index (H'), Simpson dominance index (λ) are analyzed by Primer V6 software to quantify the collected species. Through same software SIMPER, Cluster analysis also done to compare similarity between season.
Species Diversity of Polychaete Worms from Some Selected Freshwater Environme...ijtsrd
The number of freshwater species in the world is quite small when compared with the vast number of marine species. There are several marine forms which are penetrated brackish and freshwater but remain unable to breed there while others have adapted sufficiently to remain for their entire life span. Polychaetes are commonly found in Indian estuaries, among 152 species recorded, 119 species from the east coast, 10 species from both east and west coasts. A total of 8 species were identified along Thenkasi District. Macro benthic polychaetes highlighted the presence of indicator species at all stations. Most of the benthic studies explored that Nereididae is the dominant species. The polychaetes observed throughout this study were a similar size and this is a clear indication of extreme disturbance imposed on the sediment. The present findings show macrobenthic polychaete diversity rich all along the Thenkasi District of Tamil Nadu. S. Balasubramanian | T. Citarasu | S. Lazarus | A. Renu "Species Diversity of Polychaete Worms from Some Selected Freshwater Environment of Thenkasi District, Tamil Nadu" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26516.pdfPaper URL: https://www.ijtsrd.com/biological-science/zoology/26516/species-diversity-of-polychaete-worms-from-some-selected-freshwater-environment-of-thenkasi-district-tamil-nadu/s-balasubramanian
Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bha...ijtsrd
The present study was conducted in Shahjangi Pond of Bhagalpur District of Bihar during April 2021 to March 2022. Zooplanktonic abundance and diversity were determined by using standard method. The principal aim of this study was to study more about the swamps overall zooplankton diversity. Water samples were collected using zooplankton net and preserved with formalin aqueous solution of formaldehyde and 5 neutral buffer 10 ml on the spot, then brought to the laboratory for further analysis. Totally 21 species of zooplankton of four different classes were recorded rotifer, cladocera, copepod and ostracoda in which Rotifera was the most dominant class followed by the cladocera, copepoda and ostracoda. From total 21 genera 10 were belongs to Rotifera, 6 from cladocera, 3 from copepoda and 2 from ostracoda. Shannon Weaver index were employed to analysis the species diversity. Priyama Kumari | Dr. Ashok Kumar Thakur "Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bhagalpur, Bihar (India)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-3 , April 2022, URL: https://www.ijtsrd.com/papers/ijtsrd49809.pdf Paper URL: https://www.ijtsrd.com/biological-science/zoology/49809/study-of-zooplankton-abundance-and-species-diversity-in-shahjangi-pond-of-bhagalpur-bihar-india/priyama-kumari
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Photosynthetic Pigments Content of Trapa Natans Specie in Skadar LakeIJEAB
Skadar lake is the largest lake in th Balkan Peninsula. The total area is 5500 m². Terretorialy the lake belong to Montenegro and to Albania. Both the sides of lake is a big development of acquatic vegetation, including a large variety of habitats and biological communities. The most important associations are Potameto-Najadetum, Trapetum natantis, Myriophyllo-Nupharetum, Nymphoideum peltata. These associations include lake shore macrophytes Najas, Vallisneria, Potamogeton, floating macrophytes Nuphar luteum, Trapa natans, Numphaea alba. Emersed water macrophytes are developed on both sides of lake predominantly in the eastern part of lake (Kamice Shegan) which go as far as 3 meter deep such Ceratophyllum, Najas marina, Najas minor, Vallisneria.Trapeum natantisi is largely widespread community in the Skadar lake. Waternuts develops wide population and communities in the inner and deeper part of the floating macrophyta zones. Plant samples were collected on the both sides of the lake. For Trapa natans specie is determined the content of photosynthetic pigments, chlorophyll a, chlorophyll b and carotenoids. Photosynthetic pigments were extracted with 80% acetone and their concentrations are expressed in mg/g dry absolutely leaf .Their measurement is made in the bands f 663, 645.470, of spectriphotometer. Trapa natans was found in the eastern shore and in western shore of Skadar lake. The highest values of chlorophyll a an b in the species Trapa natans was found in September 2014.
Evaluation of the Ichthyotoxicity of Dioscorea Dumetorum on the African Catfi...AJSERJournal
Dioscorea Dumetorumtubers are used in stupefying fish for easy harvesting in Akwa Ibom State, Nigeria
specifically in Annang part of the state. D. dumetorum belongs to the family of Dioscoreaceae and is commonly known
as bitter yam. This study was conducted to determine the bioactive components and evaluate the acutetoxicity of the
aqueous extract of the D. dumetorum on C. aariepinus fingerlings and anuran tadpoles. The 96hLC50 values of D.
dumetorum tuber aqueous extracts were determined in the laboratory under static bioassay conditions against C.
aariepinus fingerlings and anuran tadpoles. Range finding bioassays were conducted to get the range of concentrations
for the definitive bioassays. The range of concentrations of test media for C. aariepinus fingerlngs was 0.6-5mgl-1 while
that of anuran tadpoles was 1.6-3.8mgl-1
. The median lethal concentrations (LC50) were determined using probit
analysis. The 96hLC50 value of the test plant against exposed fingerlings was 2.153mgl-1 with lower and upper
confidence limits of 1.869 and 2.485mgl-1
respectively while that of tadpoles was 2.538mgl-1 with lower and upper
confidence limits of 2.295 and 2.771 mgl1
respectively. Unpaired t-test showed that there was no significant difference
(p>0.05) between the toxicity of the test plant to C. aariepinus fingerlings and that of anuran tadpoles. The mean water
quality parameters were within the optimal range requirement for the test species. The study indicated that D.
dumetorumexerted piscicidal property on C. aariepinus fingerlings and anuran tadpoles. The indiscriminate use of this
plant to catch fish by local fishermen should be discouraged.
Evaluation of the Ichthyotoxicity of Dioscorea Dumetorum on the African Catfi...AJSERJournal
Dioscorea Dumetorumtubers are used in stupefying fish for easy harvesting in Akwa Ibom State, Nigeria
specifically in Annang part of the state. D. dumetorum belongs to the family of Dioscoreaceae and is commonly known
as bitter yam. This study was conducted to determine the bioactive components and evaluate the acutetoxicity of the
aqueous extract of the D. dumetorum on C. aariepinus fingerlings and anuran tadpoles. The 96hLC50 values of D.
dumetorum tuber aqueous extracts were determined in the laboratory under static bioassay conditions against C.
aariepinus fingerlings and anuran tadpoles. Range finding bioassays were conducted to get the range of concentrations
for the definitive bioassays. The range of concentrations of test media for C. aariepinus fingerlngs was 0.6-5mgl-1 while
that of anuran tadpoles was 1.6-3.8mgl-1
. The median lethal concentrations (LC50) were determined using probit
analysis. The 96hLC50 value of the test plant against exposed fingerlings was 2.153mgl-1 with lower and upper
confidence limits of 1.869 and 2.485mgl-1
respectively while that of tadpoles was 2.538mgl-1 with lower and upper
confidence limits of 2.295 and 2.771 mgl1
respectively. Unpaired t-test showed that there was no significant difference
(p>0.05) between the toxicity of the test plant to C. aariepinus fingerlings and that of anuran tadpoles. The mean water
quality parameters were within the optimal range requirement for the test species. The study indicated that D.
dumetorumexerted piscicidal property on C. aariepinus fingerlings and anuran tadpoles. The indiscriminate use of this
plant to catch fish by local fishermen should be discouraged.
Qualitative and quantitative analysis of phytoplankton in culture pond of Noa...AbdullaAlAsif1
A study was conducted on qualitative and quantitative analysis of phytoplankton in cultured ponds of two fish farms of Noakhali district, Bangladesh from 15 September to 15 November 2012 to identify and estimate the abundance of phytoplankton in various culture ponds of two fish farms. Analyses of phytoplankton samples recorded a total of 4 classes phytoplankton viz.; Bacillariophyceae, Chlorophyceae, Cyanophyceae, Euglenophyceae. Out of 21 phytoplankton genera identified, 5 belong to Cyanophyceae, 7 to Chlorophyceae, 5 to Bacillariophyceae and 4 to Euglenophyceae. Among the identified genera, Euglena, Microcystis, Eurolena were found to be dominant genera. Total phytoplankton abundance was varied from 36×105 cells/L to 94.92×105 cells/L in the experimental ponds. Among all experimental ponds, Chlorophyceae was found dominant (44.4×105 cells/L). Second dominant group was Euglenophyceae (39.6×105 cells/L) observed in pond-1 of Bismillah Agro Production (BAP). Total phytoplankton densities were recorded 47.82×105cells/L and 51×105 cells/L in pond-1 and pond-2 of Subarna Agro Based Initiative (SABI) respectively. In BAP, total phytoplankton densities were recorded 94.92×105cells/L and 36×105 cells/L in pond-1 and pond-2 respectively. Management technique and water quality parameters were also studied during study period namely water temperature, conductivity, salinity, transparency, dissolve oxygen and pH. The present study reveals that phytoplankton species are variable among the culture ponds and their density is also variable. The information provides for more research to compare water quality and pond phytoplankton characteristics in earthen aquaculture systems with and without fish stocking. Further studies on the seasonal changes of water quality parameters and its effects on phytoplankton production in the fish ponds and all year extended monitoring is recommended in future studies.
Similar to Aquatic weeds diversity of Fatki River in Magura district, Bangladesh (20)
Fish to finance: unraveling the economic threads of Bangladesh’s Blue EconomyAbdullaAlAsif1
Bangladesh, with its extensive river network, vast coastlines, and rich maritime heritage, stands at the crossroads of a transformative Blue Economy. This comprehensive review explores the rich tapestry of Bangladesh's maritime journey. Commencing with a historical lens, it traces the nation's roots in fisheries, showcasing its transformation into a diversified and dynamic Blue Economy. The significance of this transition unfolds across the review, underscoring the sector's contributions to GDP, employment, and food security, while candidly addressing challenges such as overfishing and environmental impact. This work not only chronicles historical milestones but distills valuable lessons from both successes and setbacks, offering a nuanced understanding of the economic resilience embedded in Bangladesh's fisheries sector. Beyond a historical retrospective, the review navigates through the contemporary landscape, emphasizing diversification beyond fisheries. It illuminates economic opportunities in maritime trade, explores non-fish marine resources, and delves into the transformative role of aquaculture. The policy framework governing Bangladesh's Blue Economy comes into focus, dissecting government strategies, legal landscapes, and international collaborations. The review also champions environmental sustainability, highlighting the impact of Blue Economy activities on marine ecosystems and advocating for conservation measures, thus positioning Bangladesh as a steward of its rich maritime heritage. Financial mechanisms and investments emerge as pivotal elements, shaping the trajectory of Blue Economy projects, as evidenced by case studies that weave success stories and lessons learned into the narrative. Concluding with a forward-looking perspective, the study identifies emerging trends, growth opportunities, and strategies to tackle challenges, offering a comprehensive roadmap for sustainable development. In weaving together economic vibrancy, environmental stewardship, and future aspirations, this review illuminates Bangladesh's maritime odyssey as a beacon for the global Blue Economy community.
Successful hybridization between Clarias microstomus♂ and Clarias gariepinus♀AbdullaAlAsif1
Hybridization is a significant approach to breeding that enables the creation of new varieties that enhance genetic diversity. Through fish inter-species hybridization, it is possible to produce hybrids that can be utilized in aquaculture and stocking programs to enhance growth rate, transfer desirable traits between species, and combine the favourable attributes of two parents into a single progeny. The present study revealed the successful hybridization between Clarias microstomus (Ng, 2001) ♂ and Clarias gariepinus (Burchell, 1822) ♀ for the first time in the aquaculture industry. C. microstomus is a species of Clariid catfish endemic to the island of Borneo and C. gariepinus is an introduced species widely aquacultured throughout the southeast Asian region. The embryonic development of the hybrid offspring is described with the hatching percentage of 58.63% and the early survival rate for the first 72 hours for the larvae of 85.76%. The hybrids showed no signs of deformities and developed normally. The findings of the study provide a new high yield variety of catfish for farmers and aquaculture industry for increasing production and profit margin.
Freshwater gastropod diversity in the selected lotic environment, Betong, Sar...AbdullaAlAsif1
Freshwater Gastropoda can be considered as the biological indicator in ecosystems such as rivers, streams, lakes, and ponds. The objectives of this study are to identify freshwater gastropod species, diversity, and distribution along Sungai Penebak, Sungai Nanga Tiga, and Sungai Kabo in the Betong division. The study was conducted on 10 November 2020. A 50 m transect was laid on the riverbank of all three stations. The existing specimens were counted and collected from each sampling point and stored were taken to the laboratory for species identification. The diversity index and morphological study of freshwater gastropods were performed. Five species of freshwater gastropods belonging to four families were discovered. The five species of freshwater gastropods consisted of Sulcospira pageli, which shows great abundance, followed by Clea nigricans, Brotia costula, Pila ampullacea, and Vittina pennata. The diversity indices of collected Gastropoda species from the different stations, for instance, Shannon Weiner diversity index (H’), Pielou’s evenness index (J’), and Margalef’s richness index were assessed; where station 3 showed higher diversity of Gastropoda compared to other two stations. The information presented in this paper might be helpful for ecological wealth studies and considered as the baseline data for the stream ecosystem in Sarawak, Malaysia.
Macrofaunal diversity on the surface sediment of mangrove habitat adjacent to...AbdullaAlAsif1
Macrofaunal diversity and composition are essential to understanding the ecosystem structures and functions of mangroves in any dynamic estuarine coast. To understand the temporal distribution of macrofaunal community structures and diversity on the surface sediment in the intertidal mangrove forest next to the seagrass beds, this study was conducted at Punang-Sari-River estuary, Lawas, Sarawak (Malaysian Borneo), South China Sea. Sampling was done during post-monsoon, intermediate-September, premonsoon, and monsoon from July 2019 to February 2020. The mean macrofauna abundance was higher pre-monsoon, while Gastropoda Optediceros breviculum (L. Pfeiffer, 1855) was the most abundant (RA = 0.704). Important species index (ISI = 70.36) and percentage of contribution (64.97%) were also higher of this species than any other records from the site. The ANOSIM (Analysis of Similarity), Jaccard index and SIMPER (Similarity Percentage Analysis) analysis suggested that the highest species abundance similarity was observed between pre-monsoon and monsoon, while the highest dissimilarity was observed between intermediate-September and pre-monsoon (74.67%). Seasonal PCA, nMDS, and cluster analysis revealed that pre-monsoon and monsoon were comparable in species and individual abundance. The dominance (0.85) was found significantly higher (P < 0.0001) in intermediate-September, while Simpson (0.734), Shannon (1.56) and Evenness indices (0.528) were found higher in monsoon, followed by the higher Margalef richness indices (3.21) in post-monsoon. It was observed that the seasonal ecological parameters were found to be significantly (P<0.05) different, including the temperature, salinity, rainfall, pore water nitrogenous compounds (NO2, NO3 and NH3-N), phosphorus compound (PO4) and micro minerals. The Canonical Correspondence Analysis (CCA) results suggested that ecological factors influenced several species. Considering the few studies on mangrove macrofauna in Malaysian Borneo, further research on their trophic structures and food web interactions is very important to disclose their overall characteristics and ecosystem functions.
Population characteristics of the Japanese threadfin bream Nemipterus japonic...AbdullaAlAsif1
Nemipterus japonicus (Japanese threadfin bream) is one of the most significant fish species throughout the Indo-Pacific regions. No previous studies on the population dynamics of N. japonicus have been carried out in the Eastern Malaysia (Malaysian Borneo). The present study focused on the population dynamics of N. japonicus from April 2013 to March 2014 in the coastal area of Bintulu, South China Sea. Local fishermen provided samples, which were then analysed. The FiSAT II software was used to evaluate the collected length frequency data. The asymptotic length (L ∞) and growth coefficient (K) were 26.78 cm and 0.85 yr-1, respectively. The growth performance index (ϕ'), total mortality coefficient (Z), natural mortality (M) and fishing mortality (F) were 2.785, 2.97, 1.63 and 1.34 per year, respectively. According to the estimates, the exploitation rate (E) for N. japonicus was 0.45, while the E 0.1 , E 0.5 and E max were determined as 0.72, 0.4 and 0.806, respectively. The obtained value of exploitation was less than E max, although slightly higher than E 0.5. The recruitment characteristics of N. japonicus have been stable throughout the year, with one peak pulse. The results contribute to the knowledge of the dynamics of N. japonicus populations and are important for the sustainable management of the Sarawak fishing resources.
Proximate and mineral composition of the long-spined Sea Urchin (Diadema seto...AbdullaAlAsif1
Gonad of sea urchin is considered as food delicacy in many parts of the world due to high nutrition and mineral contents. Several species of sea urchins are available in Malaysia and reported from different habitat, including seagrass beds, coastal breakwater, coral reefs and other ecologically important habitats. The current study was undertaken to evaluate the proximate and mineral composition of long spined sea urchin (Diadema setosum) roe collected from breakwater of Terengganu, Malaysia in October 2019, November 2019 and January 2020. The samples were analysed for proximate including protein, lipid, moisture, and ash content of sea urchin roe. The macro, micro minerals and heavy metals were also evaluated including Ca, Fe, Zn, Cu, Co, Se, Mg, Ni, Pb, Al, and Cd. The result suggested that, long spined sea urchin (Diadema setosum) roe can be considered as good sources of food due to high percentage of protein (ranged between 36.21±0.44 and 50.14±4.63). The presence of heavy metal such as Ni, Pb, and Cd suggesting the breakwater environments were not good enough and the possible sources of heavy metals contamination in sea water environment must be stopped and eradicated. This study provides important information with regard to the proximate and mineral values of D. setosum, as well as the need for a better management of its habitat before D. setosum can be widely promoted as delicacy in this region.
Trends in seagrass research and conservation in Malaysian watersAbdullaAlAsif1
The seagrass ecosystems found in the marine and coastal areas, with substantial economic and ecological services and span all over the globe excluding the Antarctic region. The Coral Triangle and Southeast Asia are recognized as a worldwide hotspot of seagrass species and habitats, encompassing 10-21 species of seagrass in every nation , although the study, understanding, and quantity of publications on seagrass ecosystems are rather limited in the region, including Malaysia. Malaysia contains 18 seagrass species from three families, which occupy 16.8 km 2 of coastal area, where the study and discovery of seagrass species and meadows began in 1904 with the report of Beccari. All of the published papers reviewed reported on Malaysian seagrass-related research, which was divided into nine topic groups: biology and distribution, carbon sequestration, fauna, remote sensing, impact and pollution genetic study, restoration , microbiological investigation, and others. The extensive study of the seagrass ecosystem began in 1993, and we have identified 183 published papers from Scopus, 141 publications from Web of Science, and 42 from Google Scholar. However, the average trend of the number of publications from 1993 to 1999 was 0.71 ± 0.36, while from 2000 to 2022 was 7.70 ± 1.16 followed by the average trend of the yearly number of publications was 6.78 ± 1.08. The highest number of publications was found on faunal categories (43.17%), followed by biology and distribution (21.85%). The number of articles that were published on Malaysian seagrass meadows each year has been discovered to be rising, which indicates that the trends in seagrass study and publishing were progressively garnering the attention of researchers, academics, and the government. However, to better understand the sustainable ecology and ecosystem services provided by seagrass habitats, an emphasis on certain research niches, such as the genetic study of flora and fauna in seagrass meadows, microbial ecology, and restoration as well as conservation of seagrass species might be helpful.
First record of saucer scallop Ylistrum balloti (Bernardi, 1861) from equator...AbdullaAlAsif1
Ylistrum balloti is one of the Pectinidae species distributed within the Indo-Pacific region. Recently, 15 live specimens of Y. balloti were recorded from the continental shelf of Sarawak, Malaysia. The main morphological characteristics were displayed on the outer valve, these being a brown-red colour and a clear concentric pattern of thin brown lines. The prominent internal ribbing numbers on both valves also helped species identification. The preliminary report of Y. balloti revealed that the species is present in Sarawak waters and can be further explored in the future.
Culture and production of Lucilia sericata Meigen (1826) larvae for rearing s...AbdullaAlAsif1
The fly larvae (Lucilia sericata) are being used as an alternative protein source in any kind of animal feed as it reduces the cost of preparation of feed. This current study focused on the physico-chemical and proximate properties of raw poultry waste, while this study also revealed the production process of fly larvae and the proximate composition of it. The poultry waste was collected from Suvro poultry farm, Sutiakhali, Mymensingh, then the physic-chemical properties of the raw poultry waste were determined using different procedures. Three treatments were considered for production of fly larvae, T 1 (3 kg), T 2 (6 kg) and T 3 (9 kg) in a 15 kg capacity tray with three replications. After production, the proximate composition were also measured of fly larvae. Physico-chemical properties such as, color, odor, texture, temperature, pH, total solids (TSS+TDS), chemical oxygen demand, dissolved oxygen, alkalinity, available N, available P, and fiber in raw poultry waste were determined and presented. Proximate composition such as, moisture, total N, total P, available N, total Ca, ash and crude fiber were found in significant amount in the poultry waste. It was found that T 3 (1350±68g) produced highest volume of live maggot compared to the other treatments, but T 2 (17.50±1.10%) produced highest percentage volume. The proximate compositions of fly larvae were assessed and found 56.60±0.25% protein value in it, suggesting that fly larvae could be the protein replacer in fish feed. The result of this study revealed cheap protein source in aquaculture production, such as production and rearing of stinging catfish Heteropneustes fossilis, and the findings might be helpful for cost reduction in aquaculture operation.
Replacement of fish meal by Lucilia sericata (Meigen, 1826) live larvae and p...AbdullaAlAsif1
Reduction of aquaculture operations and production cost is key to the success and profitability of this enterprise, while protein needs, especially the cost of fish meal, are cery expensive. The current study was conducted to investigate the post-larval production performance of Heteropneustes fossilis using Lucilia sericata maggot as a fish meal replacer in two ways, namely, live larvae and powder form. A 28 days growth trial was performed where five isonitrogenous diets for Heteropneustes fossilis post-larvae were experimented using live maggots and maggot meal, respectively. The proximate composition of each formulated diet, growth parameters of fish post-larvae, such as, weight gain, specific growth rate, protein efficiency ratio, apparent protein utilization, survival rate and the food conversion ratio were examined. After the experiment, the carcass composition of the experimental fishes were evaluated. The best final weight (1.61 g), weight gain (1.418 g), percentage of weight gain (739±1.18%), specific growth rate (2.63), protein efficiency ratio (2.29), apparent protein utilization (85%), survival rate (90%) and lower food conversion ratio (2.06) were observed in fish fed with 75% maggot meal as a substitute of fish meal. This study will help the aquaculture industry, especially the catfish culture in identifying an alternate source of protein and lowering the cost of aquaculture operation.
The molecular approach reveals the relationship among Venus clams (Meretrix s...AbdullaAlAsif1
Molecular study is important to detect variations and similarities among species from the same genus, in case if they do not encompass any morphological or physiological differences. The study was conducted to differentiate among species of Meretrix spp. (Meretrix lyrata, M. meretrix, and M. lusoria) obtained from two locations in Malaysia through the phylogenetic tree. The adductor muscle tissues were used to extract DNA and to perform other procedures; the samples were subjected to analyses using PCR and gel electrophoresis. The multiple sequence comparison was conducted by MUSCLE and the phylogenetic relationships were established using Maximum Likelihood (ML) statistical methods with MEGA 6.0 statistical software. M. lyrata samples showed 99% similarity to the three accessions sequence, where M. lyrata indicated 87% similarities, and M. meretrix showed not more than 89% similarities from the deposited sequence. The nucleotide base composition sequences consisted of the mean of Thiamine (T) 37.9%, Cytosine (C) 15.4%, Adenine (A) 27.4%, and Guanine (G) 19.4%. Maximum Likelihood (ML) analysis was conducted using the Tamura 3-parameter model to establish five major clades on Meretrix spp. and two out-groups clades significantly different from the Meretrix spp. These major clades were closely related to each other at the 50% evidence of bootstrap, which grouped as genus Meretrix. The present study on Meretrix spp. from the Sarawak locality was able to differentiate COI sequences between M. lyrata, M. meretrix, and M. lusoria. M. lusoria was close related to M. meretrix with strong bootstrap supporting evidence at 96% scoring. Moreover, M. lyrata was inferred as the ancestor to M. meretrix, and M. lusoria from Sarawak, Malaysia.
Disappearance or overlooked or untouched? - A brief history of aquatic gastro...AbdullaAlAsif1
The aquatic gastropods (marine and freshwater) in Malaysian Borneo (MYB) have an ancient history of 255 years, while the first record was observed in 1767 by the pioneer Carl Linnaeus. Over time, many European, native taxonomists and conservationists have worked on the diverse group of gastropods in the Malaysian part of Borneo (states of Sabah and Sarawak). No previous work has been conducted to assess the historical status of this particular class of Mollusca. The study objective was to reveal the types of aquatic gastropods and the number of published research and expeditions conducted in MYB. The bibliometric analysis found 145 research publications mentioning the names of the region and reporting at least one gastropod species from this geographic region. Over the history of 255 years, a total of 559 gastropod species were reported by different research groups. Between 1767 and 1900, a total of 150 gastropod species were reported, followed by 79 species from 1900 to 2000 and 330 species from 2001 to 2022. The Grubbs test (p<0.05) identified outlier years for the reporting of gastropod species from MYB with 54 new species each in 2011 and 2020 and 39 species in 2001. Over the history of aquatic gastropod research in MYB, the taxonomists making the greatest contribution were Han Raven and his colleagues from Naturalis who reported 111 new species from the region, followed by Nur Leena Wong from Universiti Putra Malaysia (54 new species). The results suggested that reporting of new species from MYB is increasing, which may reflect the many unexplored sites and suggests the existence of as yet unrecorded species in this ecoregion. In this regard further expeditions and research should improve estimates of the true number of aquatic gastropod species in this area. These results can help the regional governments in making a regional biodiversity database as well as in taking decisions regarding aquatic gastropod research and management.
A ray of hope in the darkness: What we have learned from Yangtze giant soft-s...AbdullaAlAsif1
The Swinhoe's softshell turtle, Rafetus swinhoei (Gray, 1873),) is one of the world's largest freshwater turtles, and possibly the most endangered turtle species on the planet (Stanford et al., 2018). It has an overall length of over 100 cm and a width of up to 70 cm, and it can easily weigh up to 70–100 kg, maximum weight was recorded at 169 kg (Solimine, 2013; Trong, 2018). Despite its enormous size and unusual look, this species is incredibly secretive and only comes to the surface to breathe, preferring to remain submerged deep down. For this species, there is very little ecological information, and the remaining distribution is unclear. This could explain why it's so difficult to positively identify and confirm occurrences of this species in the wild (Trong, 2018). If we look back to the history and biogeography of this species, it can be found that the existential records were documented in the historical literature of the Chinese and Vietnamese dynasties. This species was once thought to only live along the Red River in China and Vietnam, as well as the lower Yangtze River floodplain in China, but its current population size is estimated to be just one wild individual of undetermined sex and a solitary captivity male in Suzhou Zoo, China. Although recent thorough searches in Yunnan, China, and Vietnam failed to confirm the presence of more wild specimens, some sightings were reported until around a decade ago (Stanford et al., 2018), giving hope that more individuals may yet exist in Vietnam.
Snapper shrimp is a symbiotic organism usually hidden under the rocks, sponges and pen shells in the seagrass and coral habitats. The relationship study within snapper shrimp and pen shell was conducted from Merambong shoal, one of the biggest seagrass beds in peninsular Malaysia. A total of 40 individual pen shells were collected randomly and four species of pen shells were identified. 40 Anchistus custoides were found inhabiting symbiotically in the mantle cavity of the pen shell as solitary males and females and heterosexual pairs. Pen shell, Pinna bicolour and Atrina vexillum recorded the highest average SH 217.79±53.15 mm, SV 2.62±1.36 dm3 and SH 164.10-224.78 mm with the SV 1.18±0.43 dm3, respectively compared to the other species. The size of Anchistus custoides ranged from 15.00 to 20.00 mm in length and it was determined to be female due to the presence of eggs in the pleopods. The length of the cephalothorax and its length were highly related (rs=0.563, p≤0.01, N=40) and found wider in females. A little difference in size between the left and right chela in males of identical length was noticed, although the left chela is much bigger than the right. The significant relationship (rs=0.450, p≤0.01, N=40) between the pen shell length and shrimp (male-female) length revealed that the size of the shell is important to be hosted the snapper shrimp in the shell cavity.
Diversity of fisheries in Sarawak, Northwest Borneo: Present status and conse...AbdullaAlAsif1
Information on fisheries resources in East Malaysia is scarce and poorly known. The current review aims to compile a checklist of fisheries resources in the Northwest Borneo (Sarawak, Malaysia) from available published literature, address the resources' present status, and suggest future monitoring needs for selected critical species. The study also aims to determine several Sarawak land-use issues that are in flux and responsible for habitat degradation. Five hundred sixty-four species belonging to 123 families and 32 orders were recorded from Sarawak waters. Freshwater fish species comprised 48.0% of the total, followed by a marine (36.6%), marine-euryhaline (12.9%), and brackish water (2.5%) species. Of this, Cyprinidae was the most dominant group accounting for the greatest number of species (82 species), followed by Balitoridae (34 species), Bagridae (21 species) and Penaeidae (21 species). Therefore, available fisheries resources should be managed carefully as 48 species (9.0%) are currently vulnerable to extinction. Furthermore, the presence of 20 alien species in Sarawak water bodies also requires attention from the authorities due to the potential disruption of aquatic ecological balance. Changing land use issues in Sarawak such as forest degradation, agricultural expansion, peatland deforestation and conversion, logging, destruction of mangrove forests, and construction of hydroelectric power dams and flood mitigation channels pose significant challenges to fishery management in Sarawak. Our study documents the priority of fishery monitoring and conservation in Sarawak water bodies to ensure sustainable management of fisheries resources.
Availability and potentiality of small indigenous species of fish throughout ...AbdullaAlAsif1
This study was conducted with aiming to know the present status of small indigenous fish species (SIS) in Oxbow Lakes/baors and rivers as well as the availability of SIS of fish and their potentiality in the study area. Regular data were collected from some important fish landing center cum markets, Oxbow Lakes and rivers of the study area. The availability of small indigenous species (SIS) of fish declined to a great extent over the years and many of them are rare or endangered due to death of rivers and baors were brought under aquaculture. Besides these, Many of SIS of fish were being increasingly used as trash fish for fish feed purpose. As an over populated country, demand of SIS of fish is increasing day by day. After 1990s almost all Oxbow Lakes have been gradually trying to bring under aquaculture through local community or Department of Fisheries. The most significant message of this study is that, some vulnerable and endangered SIS of fish are locally abundant both in fish landing center, baors and rivers. So they must be conserved for their bioavailability and nutrition throughout the country that would be most intelligent efforts in favor of global ichthyo-biodiversity conservation.
Socio-economic conditions of the fish farmers in Jessore, BangladeshAbdullaAlAsif1
The study was conducted the fish farmers in some selected area at sadar upazila in Jessore under the district of Jessore from September to December 2013. A total of 100 fishermen were selected by stratified random sampling method and interviewed. The average me mbers of single family were 5-6 people per household. Single families were much more (62 %) than joint families. Most of the fish far mers were Muslims 92% and few of them were Hindus 8%Most of them had the secondary educational background and some of them with different levels of higher education. It was found that the number of school going children was 2-3 per house. Full katcha (17 %) houses were few, while the semi-pucca (40%) and pucca (43%) houses were more abundant. Regarding health and sanitation, 31% fishermen reported to suffer fro m gastric and 17% suffered from fever. Most of the interviewees were found to take credit facilities from different sources for the subsistence of their family and their venture. The 98% were found to have their tube-wells, others using Governmental tube-well, or those belonging to schools or neighbors However, they need more institutional, organizational, and technical and credit support for their better socioeconomic and sustainable livelihood.
Socio-economic condition of fish fry and fingerling traders in greater Jessor...AbdullaAlAsif1
The present study was conducted to assess the livelihood status of fish fry and fingerling traders and socioeconomic condition in the greater Jessore, Bangladesh from April 2013 to September 2013. Data were collected through the use of well-structured questionnaire from the selected area. 73% of traders have single family but only 27% have joint family. 45% fish fry and fingerling traders family has four members. 20% family has five members, 14% family has six members, 12% family has three members 9%family has seven to eight members respectively. 92% traders has own bank account but only 7% traders uses their bank account when they trade fry and fingerling. 87% traders have secondary business like rickshaw business, fruit business, cloth business, fish trading etc. Among 300 fish fry and fingerling traders the sanitation facilities are present 100%. It was found that 69% and 31% of fish farmers used semi-pucca and pucca toilet respectively. Among 300 fish fry and fingerling traders 78% of traders have own house but only 22% of trader live in rental house or place. 46% of traders have institutional education that range from primary to higher education and other 54% of traders have no experience in education. In case of illness 58% of traders and trader's family goes to government hospital, 24% uses private clinic, 15% traders are uses local village doctor and another 3% does not get any treatment or not require no treatment. 93% traders have television, 5% house consist radio and another 2% house no instrument for entertainment. Only 10% trader wants their son and grandson engages with this fish fry and fingerling trading profession. The average monthly income of traders in the peak season is 18000 taka and off-peak season the income is less than 7000 taka per month.
Marketing of fish and fishery products in Dinajpur and livelihoods of the fis...AbdullaAlAsif1
Marketing of fish and fishery products in Dinajpur and livelihoods of the fish retailers were studied during the period from January to May, 2013. A total of 60 fish retailers were interviewed for obtaining pertinent data. A survey questionnaire was developed, pre-tested and finally used for collection of data. The collected data were tabulated using conventional statistical tools. The result showed that the livelihoods of a large number of people are associated with fish and fishery products distribution and marketing in six different markets. Three types of marketing channel were found to be operated in the selected markets. The shorter marketing chain which included the fish farmers, retailers and consumers was found to be more beneficial to the fish producers. Fish traders in village markets generally operate a capital of around TK. 8,000-10,000 and traders in town markets a capital of around TK. 10,000-20,000 per day. It was found that most of the fish traders used their own money. Price of fish depends on market structure, species, and freshness, supply demand of fish and size of fishes. There are seasonal variation in prices with the highest in summer (March to May), and lowest in pre-winter: (September to November) during the fish harvesting season. Different types of dried and salted fish were sold in the markets. Traders have broadly improved their food consumption facilities, standard of living, and purchasing power as an economic sector. However, the unhygienic conditions of the marketplace, lack of ice facilities, poor infrastructure, inadequate storage and poor transportation facilities were reported to be the major constraints hindering the marketing system in the surveyed areas. It is therefore necessary to provision of governmental, institutional and banking assistance for improvement of the marketing system.
Socio economic status of fry collectors at Sundarban regionAbdullaAlAsif1
The study was conducted on the livelihood approach of fry collectors at Shyamnagar upazila under Satkhira district. The objective of the study was to assess the present livelihood status, to identify the socio-economic condition and problem associated with the alternative livelihood approach of fry collectors. The survey was conducted on three unions of Shyamnagar upazila adjacent to Sundarban as study area. In the study area average family size was 5 persons per family. The maximum age level was 20-30 years old. Among the fry collectors 66% was male and 34% was female. Among them 62% was Muslim and 38% was Hindu. About 78% of total fry collectors are landless in the study area. Literacy was 31% of them where female literacy was 28% and male literacy was 72% and most of them can sign only. Most of the collectors about 63% lived in mud walled with golpata shed house. About 73% families have two earner and 68% have single family. Peak season of fry collection was March to May. For collecting fry they use push net, set bag net mainly. They collect fry in the early morning and in early evening for about 6-8 hours. Men collect 150-200 pieces of fry per day in peak season and 40-60 pieces of fry by women. Price varies from 800-3500 Tk. per thousand golda fry. Price is higher in the month on March-May. About 52% collectors engaged in fishing during off season as alternative income source. Their preferable alternative income source are sustainable agriculture, fry nursing, poultry farming, planned fish cultivation, cattle and goat rearing etc. The main problem of converting of fry collection to other profession was lack of other training of other works, lack of capital, poor infrastructure.facilities, absence of industrialization, lack of land, government and NGO level work is very limited.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
Diabetes is a rapidly and serious health problem in Pakistan. This chronic condition is associated with serious long-term complications, including higher risk of heart disease and stroke. Aggressive treatment of hypertension and hyperlipideamia can result in a substantial reduction in cardiovascular events in patients with diabetes 1. Consequently pharmacist-led diabetes cardiovascular risk (DCVR) clinics have been established in both primary and secondary care sites in NHS Lothian during the past five years. An audit of the pharmaceutical care delivery at the clinics was conducted in order to evaluate practice and to standardize the pharmacists’ documentation of outcomes. Pharmaceutical care issues (PCI) and patient details were collected both prospectively and retrospectively from three DCVR clinics. The PCI`s were categorized according to a triangularised system consisting of multiple categories. These were ‘checks’, ‘changes’ (‘change in drug therapy process’ and ‘change in drug therapy’), ‘drug therapy problems’ and ‘quality assurance descriptors’ (‘timer perspective’ and ‘degree of change’). A verified medication assessment tool (MAT) for patients with chronic cardiovascular disease was applied to the patients from one of the clinics. The tool was used to quantify PCI`s and pharmacist actions that were centered on implementing or enforcing clinical guideline standards. A database was developed to be used as an assessment tool and to standardize the documentation of achievement of outcomes. Feedback on the audit of the pharmaceutical care delivery and the database was received from the DCVR clinic pharmacist at a focus group meeting.
Prevalence, biochemical and hematological study of diabetic patients
Aquatic weeds diversity of Fatki River in Magura district, Bangladesh
1. Asian Australas. J. Biosci. Biotechnol. 2018, 3 (3), 201-207
Asian-Australasian Journal of
Bioscience and Biotechnology
ISSN 2414-1283 (Print) 2414-6293 (Online)
www.ebupress.com/journal/aajbb
Article
Aquatic weeds diversity of Fatki River in Magura district, Bangladesh
Ripon Kumar Adhikary1*
, Md. Shahin Alam1
and Abdulla-Al-Asif1,2
1
Department of Fisheries and Marine Bioscience, Faculty of Biological Science and Technology, Jessore
University of Science and Technology, Jessore, 7408, Bangladesh
2
Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh, 2202,
Bangladesh
*Corresponding author: Ripon Kumar Adhikary, Department of Fisheries and Marine Bioscience, Faculty of
Biological Science and Technology, Jessore University of Science and Technology, Jessore, 7408, Bangladesh.
Phone: +8801911969016; E-mail: rk.adhikary@just.edu.bd
Received: 28 November 2018/Accepted: 20 December 2018/ Published: 31 December 2018
Abstract: 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.
Keywords: aquatic macrophytes; diversity; abundance; water parameter; habitat
1. Introduction
The vegetation of haors, beels, lakes, and ponds are rich in aquatic weed and constitute very important resources
of food medicine for rural population (Khan and Halim, 2011). Aquatic weeds constitute an important role in
aquatic ecosystems and contribute to the general fitness and diversity of a healthy aquatic ecosystem (Flint and
Madsen, 1995) by acting as indicators for water quality and aiding in nutrient cycling (Carpenter and Lodge,
1986). From ecological point of view, aquatic plants stabilize bottom sediment, protect the shoreline from wave
erosion, and serve as feeding and nesting habitat for waterfowl. These plants provide food, shelter and
reproductive habitat or breeding ground for numerous fish and other aquatic animals (Lancer and Krake, 2002).
2. Asian Australas. J. Biosci. Biotechnol. 2018, 3 (3) 202
There is an ecosystem imbalance between aquatic plants and other aquatic organisms when the plants invade the
system and grows excessively to a nuisance level. The excessive growth of aquatic weed restricts fishing,
swimming and recreational activities, causes foul taste and odour of drinking water supplies. It also leads to
stunting of fish populations and fish kill due to decomposition (Lansing, 2005). Aquatic weeds are used by man
as vegetables and fruits in the country and in some other countries. Some are used as human food and many
aquatic weeds are used for making compost fertilizer to use in River and agriculture land. Some fishes use
aquatic weed as food. Grass carp (Ctenopharyngodon idella) largely uses aquatic weed as food. Tilapia spp.
Cyprinus carpio use weeds as food to some extent. Many fishes eat soft parts of these plants in small quantity.
Moreover these plants harbour many insects, small invertebrates and periphyton which are used as fish food.
Rooted aquatic weeds prevent erosion of bottom soil. Many insects and invertebrates and some fishes used as
breeding places. Higher plants reduce turbidity. Turbidity producing silt and other particles settle on the
different parts of the plants body. They can be used carefully in well-managed and controlled conditions that can
increase fish production and as animal food and as fertilizer (Rahman, 1992). A very few researcher worked on
the percentage, composition, seasonal variation and occurrence of aquatic weed diversity from different water
body in Bangladesh. In Noakhali and Mymensingh region, any notable work had not done yet on these aquatic
weeds by any researcher. Research main motive was to identify various species of aquatic weeds and their
abundance and diversity. Knowledge on the aquatic weeds, we can understand the conditions of these different
water bodies and also how to improve these conditions which ultimately related to the fish production. So this
research was conducted in The River of Fatki which is originated from the River of Chitra and it’s located in
Kaligonj upazila under Jhenaidah district The River runs through the Upazila of Kaligonj, Magura Sadar, and
Shalikha within the district of Jhenaidah and Magura. This present study was carried out to identify the aquatic
weed species in different region of Fatki River and to determine the species variation of aquatic weeds in Arpara
bazar, Chukinogor Ghat and Kechuadubi of Fatki River under Magura district.
2. Materials and Methods
2.1. Sampling sites and periods
Samples were collected from four different locations at an interval of 1 km for 6 km which is adjacent to Fatki
River of Shalikha upazila of Magura (located at 23°15' and 23°41' north latitudes and in between 89°15' and
89°42' east longitudes at a mean elevation of 4 m above the sea level). Samples were taken from three places
Chukinogor Ghat, Kechuadubi and Arpara bazar of Fatki River under Magura district. The study was conducted
for a period of four (4) months from May 2016 to August 2016.
2.2. Sampling procedures and preservation
The samples were collected from selected areas of Fatki River. The samples were collected in plastic bags
aseptically following the methods and analysed the same day.
2.3. Sample collection
Some plastic bags are collected for sampling because samples should be protected. Samples were collected on
selected site basis from selected area in using different plastic bags for each sample. Samples were taken from
every sampling point during the study period. The samples were collected from water surface and below the
water surface in the morning hour between 8 to 10 AM. Samples were taken to the laboratory in appropriate
temperature (30-32)°C.
2.4. Taxonomic study and identification
Based on the photographs and sample observation taxonomy of the samples were determined following
references in Encyclopaedia of flora and fauna of Bangladesh, Aquatic angiosperms of Bangladesh. The
analysis was carried out within 3-4 hr. after collection. After capturing image, to complete the identification
process several books.
2.5. Data analysis
Data were processed and finally analyzed with Microsoft Excel 2007.
3. Results
3.1. Aquatic weed abundance
At the time of study, different types of species of weeds were found in the study area. The available weeds in
the selected area are given in Table 1 to Table 6 with their local names and scientific names.
3. Asian Australas. J. Biosci. Biotechnol. 2018, 3 (3) 203
Table 1. Available species of aquatic weeds in Chukinogor Ghat-1.
Sl No. Local name Scientific name
1 Biskatali Polygonum coccineum
2 Tara lota Mikania cordata
3 Topapana Pistia stratiotes
4 Malancha Alternanthera philoxeroidis
5 Arail Leersia hexandra
6 Kalmilata Ipomoea aquatica
7 Spike rush Equisetum hyemale
8 Helencha Enhydra fluctuans
9 Kochu Colocasia esculenta
10 Kachuripana Eichhornia crassipes
11 Chand mala Nymphoides aquatica
Table 2. Available species of aquatic weeds in Chukinogor Ghat-2.
Sl No. Local name Scientific name
1 Chand mala Nymphoides aquatica
2 Helencha Enhydra fluctuans
3 Kachuripana Eichhornia crassipes
4 Kalmilata Ipomoea aquatica
5 Topapana Pistia stratiotes
6 Tara lota Mikania cordata
7 Kochu Colocasia esculenta
Table 3. Available species of aquatic weeds in Kochuadubi-1.
Sl No. Local name Scientific name
1 Chand mala Nymphoides aquatica
2 Shapla Nymphaea nouchali
3 Kalmilata Ipomoea aquatica
4 Arail Leersia hexandra
5 Spike rush Equisetum hyemale
6 Kachuripana Eichhornia crassipes
7 Najas grass Najas graminea
8 Topapana Pistia stratiotes
9 Malancha Alternanthera philoxeroidis
10 Kochu Colocasia esculenta
11 Tara lota Mikania cordata
12 Biskatali Polygonum coccineum
13 Goromi Najas guadalupensis
14 Kormota Ludwigia palustris
15 Shushnipata Marsilea quadrifolia
16 Helencha Enhydra fluctuans
17 Khudipana Lemna minor
18 Hydrilla grass Hydrilla verticillata
19 Hobon Utricularia inflata
Table 4. Available species of aquatic weeds in Kochuadubi-2.
Sl No. Local name Scientific name
1 Spike rush Equisetum hyemale
2 Shapla Nymphaea nouchali
3 Arail Leersia hexandra
4 Kachuripana Eichhornia crassipes
5 Chand mala Nymphodies aquatica
6 Hobon Utricularia inflate
7 Helencha Enhydra fluctuans
8 Malancha Alternanthera philoxeroidis
9 Tara lota Mikania cordata
10 Vatshola Aeschynomene aspera
11 Biskatali Polygonum coccineum
12 Goromi Najas guadalupensis
13 Topapana Pistia stratiotes
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Table 5. Available species of aquatic weeds in Arpara bazar- 1.
Sl No. Local name Scientific name
1 Biskatali Polygonum coccineum
2 Helencha Enhydra fluctuans
3 Chand mala Nymphoides aquatica
4 Kalmilata Ipomoea aquatica
5 Kochu Colocasia esculenta
6 Tara lota Mikania cordata
7 Shapla Nymphaea nouchali
8 Arail Leersia hexandra
9 Kachuripana Eichhornia crassipes
Table 6. Available species of aquatic weeds in Arpara bazar-2.
Sl No. Local name Scientific name
1 Gagra Xanthium indicum
2 Helencha Enhydra fluctuans
3 Chand mala Nymphoides aquatica
4 Kalmilata Ipomaea aquatic
5 Kochu Colocasia esculenta
6 Tara lota Mikania cordata
7 Shapla Nymphaea nouchali
8 Arail Leersia hexandra
9 Biskatali Polygonum coccineum
10 Malancha Alternanthera philoxeroidis
11 Mutha Cyperus rotundus
12 Kachuripana Eichhornia crassipes
3.2. Taxonomic status
The taxonomic details of the aquatic weeds are enormous variant in the study area. The taxonomic formation is
shown in Table 7. The number of the species which found in the study area is also shown in Table 8.
Table 7. Taxonomic status of the aquatic weeds recorded from selected sites.
Sl No. Order Family Genus Species Habitat Type
01 Commelinales Pontederiaceae Eichhornia E. crassipes CG, KD, AB
02 Alismatales Araceae Pistia P. stratiote CG, KD
Colocasia C. esculenta CG, KD, AB
Lemna Lemna minor KD
Hydrocharitaceae Najas N. guadalupensis
N. graminea
KD
KD
Hydrilla H. verticillata KD
03 Solanales Convolvulaceae Ipomoea I. aquatic CG, KD. AB
04 Poales Poaceae Leersia L. hexandra CG, KD. AB
Cyperaceae Cyperus C. rotundus AB
05 Asterales Asteraceae Enhydra E. fluctuans CG, KD, AB
Mikania M. cordata CG, KD. AB
Xanthium X. indicum AB
Menyanthaceae Nymphoides N. aquatic CG, KD, AB
06 Nymphaeales Nymphaeaceae Nymphaea N. nouchali KD, AB
07 Lamiales Lentibulariaceae Utricularia U. inflate KD
08 Caryophyllales Amaranthaceae Alternanthera A. philoxeroides CG, KD, AB
Polygonaceae Polygonum P. coccineum CG, KD, AB
09 Equisetales Equisetaceae Equisetum E. hyemale CG, KD
10 Myrtales Onagraceae Ludwigia L. palustris KD
11 Salviniales Marsileaceae Marsilea M. quadrifolia KD
12 Fabales Fabaceae Aeschynomene A. aspera KD
**CG= Chukinogor Ghat; KD= Kechuadubi; AB= Arpara bazar
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Table 8. Number of Order, Family, Genus, Species in different habitat location.
Place No. of Order No. of Family No. of Genus No. of Species
Chukinogor Ghat 7 9 11 11
Kechuadubi 12 15 19 20
Arpara bazar 6 9 12 12
3.3. Comparison of aquatic weed in different water bodies
Among the sampling points there are two types of aquatic weed were found. Highest amount of species
variation found in the Kechuadubi. On the other hand, Chukinogor and Arpara bazar showed the lowest amount
of species (Figure 1).
Figure 1. Comparison of aquatic weed in different water bodies.
3.5. Water quality parameters observed in the different water bodies.
Water temperatures were found to be stable always at range of 29-300
C and was found within suitable range for
fish production. During the study period, DO levels were found high value in Chukinogor Ghat. The lowest
values are found in roadside canals. Transparency was recorded high number at Kechuadubi and lowest at
Chukinogor Ghat. The water quality parameters have been shown in Table 9.
Table 9. Water quality parameters in different water bodies.
Parameters Chukinogor Ghat Kechuadubi Arpara bazar
DO mg/l 7.25±0.25 5±0.3 4.75±0.25
Salinity (ppt) 0 0 0
Temperature (0
c) 29±1 30±2 30±1
Transparency(cm) 30±2 40±4 40±2
4. Discussion
Aquatic weeds are classified according to various habitats which form their eco-environment and become
conducive for their growth; reproduction and According to this study, a total of 22 species of 16 families, 12
orders and 21 genes were found. Among them some was highly dominated and some are only found in single
selected site. During this study period, nine species- Eichhornia crassipes, Ipomoea aquatica, Nymphiodes
aquatica, Enhydra fluctuans, Leersia hexandra, Mikania cordata, Colocasia esculenta, Polygonum coccineum,
Alternanthera philoxeroydis were common in Chukinogor Ghat, Kechuadubi, and Arpara bazar. But their
abundance is significantly different. Rahman (2013) recorded the total angiosperm weed species under 123
genera and 50 families were recorded in that study. Out of the total number of species 98 were frequent, 41 were
abundant, 15 were rare and 1 was very rare species. Islam et al. (2017) found that, a total of 39 weed and aquatic
species were identified in the Bangladesh Agricultural University campus. Kaisar et al. (2016) recognised 22
aquatic weed species in Noakhali sadar area, Bangladesh. Billah et al. (2018) found 37 marine species in Saint
Martin Island. In this study, eight species were only found in floodplain – Lemma minor, Marsilea quadrifolia,
Ludwigia palustris, Aeschynomene aspera, Najas graminea, Hydrilla verticillata, Najas guadalupensis, and
Utricularia inflata. 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. Cyperus rotundus and Xanthium
indicum were the two species which only found in Arpara bazar. Chowdhury and Ahmed (2012) included a total
of 29 genera belonging to 24 families of aquatic macrophysics were recorded. Among these, 25species were
recorded from the freshwater aquatic ecosystems, 4 species from both the shrimp Chukinogor Ghat sand
0
5
10
15
20
25
30
35
40
45
50
Chukinogor Ghat Kechuadubi Arpara Bazar
Percentage
Sampling site
Chukinogor Ghat
Kechuadubi
Arpara Bazar
6. Asian Australas. J. Biosci. Biotechnol. 2018, 3 (3) 206
freshwater aquatic ecosystems and only one from the shrimp Chukinogor Ghat. Regarding this study,
Chukinogor Ghat had the lowest number of species because of proper maintenance through pollution. Jayan and
Sathyanathan (2012) recorded the major aquatic weeds found in Kerala include Salvinia spp., Eichhornia
crassipes, Pistia stratiotes, Alternanthera spp., Azolla, common duckweed, and Hydrilla verticillata. In present
study, Kechuadubi has the greatest amounts of aquatic weed variety and among all 22 species around 20 species
were identified from this Kechuadubi. Shallow waters were found to be ideal habitat for most of the aquatic
weed species due to the highest amount of light penetration. As the Kechuadubi had the high diversity of aquatic
weed because of it was not filled with larger aquatic weed like as water spinach, water hyacinth, Hydrilla grass
etc. The network of drainage channels, are so badly infested in Arpara bazar which was responsible for larger
amounts of aquatic weeds. Turbid water which causes low light penetration limits the aquatic weeds. Aquatic
weeds such as duckweeds, azolla etc. amount was so high for that species variation was low in the Arpara bazar.
Uka et al. (2009) detected eight aquatic plants have been incriminated as weeds. From the current study, the
most prevalent of these weeds are water hyacinth and cattail plants. Aquatic weeds cause taste and odours
problems and also increase biological oxygen demand because of organic loading. They increase the organic
matter content of water which affects the strength of the concrete structures when used as curing and mixing
water. Water temperature is a pre-requisite for increasing the weed density. In the present study, temperature
and pH value was recorded 29.0-30.00
C and 7.5-7.8 in Chukinogor Ghat, 28.0-320
C and 7.9-8.2 in Kechuadubi,
29.0-310
C and 8.3-8.7 in Arpara bazar respectively. Chowdhury et al., (2007b) recorded the temperature yearly
ranged from 18.50
C in December to 33.720
C in August and pH value is 7.12-8.68 at Borobila beel in Rangpur
district. Eloff and Vander (1981) reported that temperature 270
C to 290
C and the pH value 6.5 to 10.5 in their
study. Raju et al. (2018) also performed such similar study in plankton population and the water parameters
were also relatively similar. During the study period, DO levels were stable at ranged from7-7.5 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 and decomposition in
Kechuadubi and Arpara bazar. According to this study, transparency was 28-32cm in Chukinogor Ghat, 36-44
cm in Kechuadubi, and 38-42 cm in Arpara bazar. But this wide range of variation in pond due to the using only
hormonal feed and not using other feed and fertilizer. During this study there was no salinity found in the study
area, which hampers the growth of aquatic weeds. High levels of salinity in wastewater can limit the growth of
water hyacinth and other aquatic macrophysics (Sooknah and Wilkie, 2004; Chowdhury et al., 2007a).
Chowdhury and Ahmed (2012) showed that the physicochemical conditions of both the habitats indicate that
very poor number of macrophysics can grow in the shrimp due to high salinity of water and soil.
5. Conclusions
In conclusion, Macrophytes are an important component of the aquatic ecosystem and broad changes in the
abundance of individual species and community composition provide valuable information on how and why an
ecosystem might be changing. Aquatic weed concentrations are highly responsive to nutrient levels,
temperatures, transparency, DO level and also the management option. So density of weeds varies from water
bodies to water bodies on the basis of water quality parameter etc. Study of diversity of aquatic weeds is
important for evaluating the water quality and also the fish production.
Conflict of interest
None to declare.
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