This document summarizes a research report on species of the genus Munida found off the coast of Thoothukudi, India in the Gulf of Mannar. It describes the collection of one specimen of Munida semoni, which was the first record of this species in the Indian Ocean. This extends the known distribution of M. semoni from the Gulf of Mannar to locations like Indonesia, New Caledonia, and Futuna Island in the South West Pacific. The study contributes to the total number of recorded squat lobster species in Indian waters.
The document describes birds found at Los Cedros Reserve in Ecuador. It provides photos and descriptions of 30 bird species observed at the reserve, including the Bicolored Hawk, Broad-billed Motmot, Squirrel Cuckoo, Golden-headed Quetzal, and Tropical Kingbird. Los Cedros Reserve contains piedmont and cloud forests ranging from 1200 to 2700 meters in elevation and is considered an important area for bird conservation with over 250 bird species recorded.
Wetlands are essential habitats for fish species like the Spiny Lobster, Queen Conch, and Nassau Grouper. These species use mangrove wetlands as nursery habitats, hiding among the prop roots and being protected from predators. However, Bahamian laws do not adequately protect these important mangrove ecosystems, and degrading and destroying the marshes for other purposes is harming fish populations. The document calls for solutions like rehabilitating degraded wetlands and ensuring human activities do not damage these habitats, in order to help regenerate populations of these important fish species.
Puffer fish belonging to the family tetraodontidae are usually distributed in the shallow waters. During investigation in stations viz. Marina Park, Chidiyatapu and Burmanullah, around Andaman, five species from genus Arothron and two from Canthigaster have been recorded and were mostly found to prefer coral reefs and rock crevices, with the exception of Arothron immaculatus, which was found to be present in the open waters and it confined to sandy bottom substrate with patches of sea grasses around them. These fishes were found to be most diverse and abundant in Chidiyatapu with the Margelef’s Richness Index of 2.49, Shannon-Wiener index of 1.05 and Pielou’s evenness index of 0.96. Biometric analysis results demonstrate that they have shown an isometric growth. The individuals collected were mostly lying in the length group of 120-160 mm. Gut content analysis of A. Immaculatus reveals that the fish feed mainly on molluscs and sea urchin and the other food items were shrimps, crabs, sponges, micro algae, foraminiferans etc. gastro-somatic index, hepato-somatic index and gonado-somatic indices were also calculated to throw light upon the feeding behavior and reproductive maturity of the fishes. Most of the individuals were found to be in the developing stage of maturity.
The document discusses threats to biodiversity and species extinction from human activities. It provides examples of population declines in tigers, lions, rhinos, vultures, polar bears, amphibians, and primates due to factors like poaching, habitat loss, pollution, and climate change. Conservation efforts are struggling to protect vulnerable species and ecosystems around the world from these threats.
This study aims to examine the effect of modified longline fishing nets on waved albatross bycatch rates among Ecuadorian fishermen. The critically endangered waved albatross population has sharply declined due to disproportionate deaths of male birds from longline fishing. Providing modified nets to 5 boats and recording interactions with albatrosses will determine if this method can reduce bycatch, as was successful in Chile. Involving fishermen could help restore relationships with scientists and support conservation of this iconic Galapagos species.
Food and feeding habits of the brackish river prawn (macrobrachium macrobrach...Alexander Decker
This document summarizes a study on the food and feeding habits of the brackish river prawn (Macrobrachium macrobrachion) in the Great Kwa River estuary in Nigeria. Stomach contents from 200 prawns collected over six months were analyzed. A variety of food items were found, including detritus, diatoms, algae, mud, sand, fish bones, insect parts, and more. Detritus was the most common food item based on frequency of occurrence. Insect parts were the most abundant food item based on numerical analysis. The study concludes that M. macrobrachion is an omnivorous detritivore that feeds opportunistically on available food
Review on fresh water fish diversity of maharashtra (india)DrRavindraPawara
The current review deals with the freshwater fish
recorded and confirmed by various authors, 165 species belonging to 09 orders, 26 families and 82
genera in Maharashtra during 2000 to 2014 and will be useful for fishermen, consumers, fish industry
producers and researchers.
The monkeys are listed as endangered because their numbers have declined due to hunting and deforestation destroying their habitat. Their habitat loss has greatly reduced their territory and they do not flee from humans, increasing their risk of being shot. A conservation organization hopes the discovery of a new sub-population will increase efforts to protect the primates' remaining habitat to significantly improve the chances of saving the species from extinction.
The document describes birds found at Los Cedros Reserve in Ecuador. It provides photos and descriptions of 30 bird species observed at the reserve, including the Bicolored Hawk, Broad-billed Motmot, Squirrel Cuckoo, Golden-headed Quetzal, and Tropical Kingbird. Los Cedros Reserve contains piedmont and cloud forests ranging from 1200 to 2700 meters in elevation and is considered an important area for bird conservation with over 250 bird species recorded.
Wetlands are essential habitats for fish species like the Spiny Lobster, Queen Conch, and Nassau Grouper. These species use mangrove wetlands as nursery habitats, hiding among the prop roots and being protected from predators. However, Bahamian laws do not adequately protect these important mangrove ecosystems, and degrading and destroying the marshes for other purposes is harming fish populations. The document calls for solutions like rehabilitating degraded wetlands and ensuring human activities do not damage these habitats, in order to help regenerate populations of these important fish species.
Puffer fish belonging to the family tetraodontidae are usually distributed in the shallow waters. During investigation in stations viz. Marina Park, Chidiyatapu and Burmanullah, around Andaman, five species from genus Arothron and two from Canthigaster have been recorded and were mostly found to prefer coral reefs and rock crevices, with the exception of Arothron immaculatus, which was found to be present in the open waters and it confined to sandy bottom substrate with patches of sea grasses around them. These fishes were found to be most diverse and abundant in Chidiyatapu with the Margelef’s Richness Index of 2.49, Shannon-Wiener index of 1.05 and Pielou’s evenness index of 0.96. Biometric analysis results demonstrate that they have shown an isometric growth. The individuals collected were mostly lying in the length group of 120-160 mm. Gut content analysis of A. Immaculatus reveals that the fish feed mainly on molluscs and sea urchin and the other food items were shrimps, crabs, sponges, micro algae, foraminiferans etc. gastro-somatic index, hepato-somatic index and gonado-somatic indices were also calculated to throw light upon the feeding behavior and reproductive maturity of the fishes. Most of the individuals were found to be in the developing stage of maturity.
The document discusses threats to biodiversity and species extinction from human activities. It provides examples of population declines in tigers, lions, rhinos, vultures, polar bears, amphibians, and primates due to factors like poaching, habitat loss, pollution, and climate change. Conservation efforts are struggling to protect vulnerable species and ecosystems around the world from these threats.
This study aims to examine the effect of modified longline fishing nets on waved albatross bycatch rates among Ecuadorian fishermen. The critically endangered waved albatross population has sharply declined due to disproportionate deaths of male birds from longline fishing. Providing modified nets to 5 boats and recording interactions with albatrosses will determine if this method can reduce bycatch, as was successful in Chile. Involving fishermen could help restore relationships with scientists and support conservation of this iconic Galapagos species.
Food and feeding habits of the brackish river prawn (macrobrachium macrobrach...Alexander Decker
This document summarizes a study on the food and feeding habits of the brackish river prawn (Macrobrachium macrobrachion) in the Great Kwa River estuary in Nigeria. Stomach contents from 200 prawns collected over six months were analyzed. A variety of food items were found, including detritus, diatoms, algae, mud, sand, fish bones, insect parts, and more. Detritus was the most common food item based on frequency of occurrence. Insect parts were the most abundant food item based on numerical analysis. The study concludes that M. macrobrachion is an omnivorous detritivore that feeds opportunistically on available food
Review on fresh water fish diversity of maharashtra (india)DrRavindraPawara
The current review deals with the freshwater fish
recorded and confirmed by various authors, 165 species belonging to 09 orders, 26 families and 82
genera in Maharashtra during 2000 to 2014 and will be useful for fishermen, consumers, fish industry
producers and researchers.
The monkeys are listed as endangered because their numbers have declined due to hunting and deforestation destroying their habitat. Their habitat loss has greatly reduced their territory and they do not flee from humans, increasing their risk of being shot. A conservation organization hopes the discovery of a new sub-population will increase efforts to protect the primates' remaining habitat to significantly improve the chances of saving the species from extinction.
This document discusses Arthrospira, commonly known as spirulina, which is a type of blue-green algae. It summarizes that Arthrospira is a nutritious food source high in protein, vitamins, and minerals. It naturally grows in alkaline lakes in places like Africa and Mexico. The document provides details on the morphology, life cycle, ecology, and taxonomy of Arthrospira. It notes that Arthrospira can help improve food security and create jobs. The production of Arthrospira requires less land and water than other crops and can grow in climates where other crops cannot.
This document provides information on various types of aquatic and marine plants. It begins by discussing the importance of water on Earth and the role of algae in producing oxygen and sequestering carbon. It then describes the divisions of algae and provides examples of species from each division. The document outlines the life cycles and reproductive strategies of different types of algae. It also discusses seaweeds, their uses, and the author's research on seaweeds. Finally, it briefly covers other aquatic plants like seagrasses, mangroves, freshwater algae, lichens, bryophytes, ferns, and invasive species.
This document provides information about biodiversity and conservation efforts. It includes:
1) Definitions of biodiversity as the diversity of species, ecosystems, and genes on Earth.
2) Statistics on the number of known plant and animal species, with insects making up the majority.
3) Descriptions of methods for conserving biodiversity both in situ, through protected areas like biosphere reserves and national parks, and ex situ in botanical gardens and seed banks.
4) Explanations of the importance of biodiversity through its ecological services and direct economic benefits to humans. Several Indian and international policies and agreements aimed at protecting biodiversity are also outlined.
Emerging Dreadful Ulcer Disease in Threatened Murrel, Channa aurantimaculataresearchanimalsciences
This document discusses an emerging ulcer disease found in the threatened ornamental fish species Channa aurantimaculata. The highest bacterial loads were found on the skin, while the lowest loads were in the heart. Aeromonas hydrophila was predominantly isolated from different organs, indicating its role in the disease. Infected fish showed increased white blood cells, lymphocytes, monocytes, and mean corpuscular volume compared to uninfected fish, suggesting involvement of the nonspecific immune response. This disease poses a serious threat to the ornamental fish trade and the first reported case of ulcer disease in C. aurantimaculata.
Isolation and potential culture of phytoplankton live feed for freshwater mus...AbdullaAlAsif1
Gastropod and Bivalves are widely known as filter feeders which used to feed the phytoplankton and other micro creatures. This study was conducted to identify, isolate and determine the potential culture of phytoplankton species for mussel culture. Materials and Methods: The phytoplankton identification and the culture of phytoplankton in ponds in UPMKB, Sarawak, Malaysia were studied for a period of 3 months from February 2019 to May 2019. Three genera were recorded from the ponds namely Selenastrum sp. followed by Licmophora sp. and Gloeocapsa sp. The highest abundant genus was Licmophora sp. due to their presence in every pond while the highest composition in culture condition was Selenastrum sp. because every treatment had this genus. The impact of physicochemical parameters on phytoplankton compositions and abundances in four ponds in UPMKB was assessed. Water quality parameters, such as temperature, dissolved oxygen, pH and conductivity were measured in situ from the ponds. Phytoplankton compositions and abundances were analyzed in the laboratory. ANOVA result of the physicochemical parameters showed the presence of significant difference among pH and temperature between ponds. The study concluded that the presence of the Selenastrum sp. genus could be the biological indicator of the water quality ponds. The best culture of phytoplankton shown by using the fertilizer treatment which was NPK fertilizer that improves the distribution of the culture of the phytoplankton.
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.
Rescue and handling of Antillean manatees Trichechus manatus manatus in Venez...ConBiVe
Given the importance of the rescue and rehabilitation
of confiscated manatees from illegal traffic or accidental
fishery entanglements, the handling and transport of
two Antillean manatees Trichechus manatus manatus
in the ‘Llanos’ of Apure state in Venezuela is
described. In 1992, two ♀ calves were confiscated in
the region of Arichuna in the Apure River and transported
to a lagoon at the Fondo Nacional de Investigaciones
Agropecuarias, Biruaca, for rehabilitation. Data
about age, size, weight and haematological values were
recorded. In 1994, one of the manatees was transferred
to the Parque Zoologico y Botanico Bararida, Barquisimeto,
in order to form a breeding pair and start a
captive-breeding programme. Successful reproduction
was achieved in 2007, 2011 and 2013. In 1995, the
second ♀ Antillean manatee was released into a natural
environment in Santa Luisa Cattle Ranch, Apure state.
The confiscation, rescue, rehabilitation and transport
(by land and air) of these two ♀ Antillean manatees
were carried out satisfactorily.
A preliminary study of Ichthyofauna of Garhi Usmani Khel stream and Meherdy s...Innspub Net
This study identified 8 fish species from 2 streams in the Malakand district of Pakistan. The species belonged to 4 orders and 5 families. A total of 338 fish specimens were collected between May and August 2016. The most common family was Cyprinidae, represented by 3 species. Puntius chola was the most abundant species collected, while Ompok pabda was only represented by 1 specimen. It was concluded that O. pabda is endangered in the River Swat and conservation efforts are recommended.
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
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.
Food security and international fisheries management RMIT University
This document discusses international fisheries management and food security. It begins by covering the FAO's vision of sustainable food and agriculture, including its key principles and goals related to ending hunger and malnutrition, doubling agricultural productivity, ensuring sustainable food production systems, and conserving genetic diversity. It then discusses the status of world marine resources and fish as a source of protein globally before introducing regional fisheries management organizations and their role in managing tuna stocks and adopting conservation measures.
This document summarizes a study that analyzed the diversity of rRNA genes in the guts of adult and fingerling Mugil cephalus (flathead grey mullet) fish inhabiting an Egyptian Mediterranean estuary. Bulk DNA was extracted from the guts and the eukaryotic 18S rRNA gene, bacterial 16S rRNA gene, and archaeal 16S rRNA gene were amplified via PCR, cloned, and sequenced. Rarefaction analyses identified 11, 18, and 13 phylotype groups of rRNA genes for eukaryotes, bacteria, and archaea, respectively, in adult guts, and 6 and 11 phylotype groups for eukaryotes and bacteria in fingerling guts (archaea were not detected in
Diversity of Molluscan communities in Kondakarla Freshwater Lake, Visakhapatnam, Andhra Pradesh
Amaravathi D*, P S Raja Sekhar, Rama Rao K
http://dx.doi.org/10.21276/SSR-IIJLS.2019.5.1.5
This study isolated endophytic bacteria from the seaweed Amphiroa anceps collected off the coast of India. 20 bacterial strains were isolated and their ability to inhibit common poultry pathogens like Vibrio, Streptococcus, and Yersinia pestis was tested. 8 strains showed sensitivity against the pathogens. The most effective strains, SW4 and SW20, had a minimum inhibitory concentration of 125 μg/ml against Vibrio. SW4 and SW16 inhibited Yersinia pestis at 250 μg/ml. The study was investigating the antibacterial properties of secondary metabolites from these endophytic marine bacteria.
This document provides information about upcoming events and projects from the Freshwater Biological Association (FBA). It summarizes:
1) A mobile exhibition called the Clear Waters Oral History Project will tour venues in Cumbria and Lancashire from May 2014 to May 2015 to showcase an oral history project funded by the Heritage Lottery Fund.
2) Upcoming training courses from the FBA on identifying aquatic beetles from June 2-3 and caddis flies from June 4-5 to help participants improve their identification skills.
3) This month's issue of the journal Inland Waters is now published with articles available online to subscribers and members of the International Society of Limnology.
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.
The document discusses Vibrio parahaemolyticus, a halophilic bacterium that can cause foodborne illness. It is found in coastal waters worldwide and can cause gastroenteritis when consumed in raw or undercooked seafood. Key virulence factors include the thermostable direct hemolysin (TDH) and the TDH-related hemolysin (TRH), which are encoded by the tdh and trh genes, respectively. Strains containing these genes are more likely to be pathogenic. The Kanagawa phenomenon (KP) refers to beta-hemolysis observed on specialized media and is correlated with TDH production and pathogenicity. Outbreaks have occurred globally but are especially common in Asia where
This document provides an overview of marine plants, including microalgae like cyanobacteria, diatoms, and dinoflagellates. It discusses macroalgae divisions (green, brown, red algae), key genera within each (kelps, coralline algae), and their reproductive strategies. The document also notes the group's research on seaweed taxonomy, phylogeny, and natural products. Their work involves offshore cultivation methods, invasive algae, products derived from seaweeds, and freshwater/terrestrial algae groups like lichens and bryophytes. The marine environment and algae play an important role in oxygen production, carbon sequestration, and supporting ocean life.
This document discusses Vibrio parahaemolyticus, a halophilic bacterium that can cause foodborne illness. It is found in coastal waters worldwide. The document covers its taxonomy, characteristics, virulence factors like thermostable direct hemolysin (TDH), epidemiology, pathogenesis including the Kanagawa phenomenon, and differentiation from non-halophilic vibrios. TDH is a major virulence factor that causes beta-hemolysis on blood agar and is associated with pathogenic strains.
This document reports on the first record of the squat lobster species Munidopsis scobina off the Thoothukudi coast of the Gulf of Mannar in India. One specimen of M. scobina was collected from a depth of 305-310 meters during trawling operations. M. scobina is described and its key diagnostic features are provided. This extends the known distribution of M. scobina in the Indo-Pacific region. A number of other species previously collected off the Thoothukudi coast are also cited.
This document discusses a study on the length-weight relationship of Pearl spot (Etroplus suratensis) fish collected from Pulicat Lake in southeast India. A total of 120 fish ranging from 3.5 to 10.5 cm in length and 2.0 to 34.0 g in weight were measured. Regression analysis found the length-weight relationship to follow an allometric growth pattern. The slope value (b) was estimated to be 1.0368, indicating the weight does not increase cubically with length. Separate regression equations were calculated for males and females. The study provides baseline information that can be used for future research and population comparisons.
This document discusses Arthrospira, commonly known as spirulina, which is a type of blue-green algae. It summarizes that Arthrospira is a nutritious food source high in protein, vitamins, and minerals. It naturally grows in alkaline lakes in places like Africa and Mexico. The document provides details on the morphology, life cycle, ecology, and taxonomy of Arthrospira. It notes that Arthrospira can help improve food security and create jobs. The production of Arthrospira requires less land and water than other crops and can grow in climates where other crops cannot.
This document provides information on various types of aquatic and marine plants. It begins by discussing the importance of water on Earth and the role of algae in producing oxygen and sequestering carbon. It then describes the divisions of algae and provides examples of species from each division. The document outlines the life cycles and reproductive strategies of different types of algae. It also discusses seaweeds, their uses, and the author's research on seaweeds. Finally, it briefly covers other aquatic plants like seagrasses, mangroves, freshwater algae, lichens, bryophytes, ferns, and invasive species.
This document provides information about biodiversity and conservation efforts. It includes:
1) Definitions of biodiversity as the diversity of species, ecosystems, and genes on Earth.
2) Statistics on the number of known plant and animal species, with insects making up the majority.
3) Descriptions of methods for conserving biodiversity both in situ, through protected areas like biosphere reserves and national parks, and ex situ in botanical gardens and seed banks.
4) Explanations of the importance of biodiversity through its ecological services and direct economic benefits to humans. Several Indian and international policies and agreements aimed at protecting biodiversity are also outlined.
Emerging Dreadful Ulcer Disease in Threatened Murrel, Channa aurantimaculataresearchanimalsciences
This document discusses an emerging ulcer disease found in the threatened ornamental fish species Channa aurantimaculata. The highest bacterial loads were found on the skin, while the lowest loads were in the heart. Aeromonas hydrophila was predominantly isolated from different organs, indicating its role in the disease. Infected fish showed increased white blood cells, lymphocytes, monocytes, and mean corpuscular volume compared to uninfected fish, suggesting involvement of the nonspecific immune response. This disease poses a serious threat to the ornamental fish trade and the first reported case of ulcer disease in C. aurantimaculata.
Isolation and potential culture of phytoplankton live feed for freshwater mus...AbdullaAlAsif1
Gastropod and Bivalves are widely known as filter feeders which used to feed the phytoplankton and other micro creatures. This study was conducted to identify, isolate and determine the potential culture of phytoplankton species for mussel culture. Materials and Methods: The phytoplankton identification and the culture of phytoplankton in ponds in UPMKB, Sarawak, Malaysia were studied for a period of 3 months from February 2019 to May 2019. Three genera were recorded from the ponds namely Selenastrum sp. followed by Licmophora sp. and Gloeocapsa sp. The highest abundant genus was Licmophora sp. due to their presence in every pond while the highest composition in culture condition was Selenastrum sp. because every treatment had this genus. The impact of physicochemical parameters on phytoplankton compositions and abundances in four ponds in UPMKB was assessed. Water quality parameters, such as temperature, dissolved oxygen, pH and conductivity were measured in situ from the ponds. Phytoplankton compositions and abundances were analyzed in the laboratory. ANOVA result of the physicochemical parameters showed the presence of significant difference among pH and temperature between ponds. The study concluded that the presence of the Selenastrum sp. genus could be the biological indicator of the water quality ponds. The best culture of phytoplankton shown by using the fertilizer treatment which was NPK fertilizer that improves the distribution of the culture of the phytoplankton.
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.
Rescue and handling of Antillean manatees Trichechus manatus manatus in Venez...ConBiVe
Given the importance of the rescue and rehabilitation
of confiscated manatees from illegal traffic or accidental
fishery entanglements, the handling and transport of
two Antillean manatees Trichechus manatus manatus
in the ‘Llanos’ of Apure state in Venezuela is
described. In 1992, two ♀ calves were confiscated in
the region of Arichuna in the Apure River and transported
to a lagoon at the Fondo Nacional de Investigaciones
Agropecuarias, Biruaca, for rehabilitation. Data
about age, size, weight and haematological values were
recorded. In 1994, one of the manatees was transferred
to the Parque Zoologico y Botanico Bararida, Barquisimeto,
in order to form a breeding pair and start a
captive-breeding programme. Successful reproduction
was achieved in 2007, 2011 and 2013. In 1995, the
second ♀ Antillean manatee was released into a natural
environment in Santa Luisa Cattle Ranch, Apure state.
The confiscation, rescue, rehabilitation and transport
(by land and air) of these two ♀ Antillean manatees
were carried out satisfactorily.
A preliminary study of Ichthyofauna of Garhi Usmani Khel stream and Meherdy s...Innspub Net
This study identified 8 fish species from 2 streams in the Malakand district of Pakistan. The species belonged to 4 orders and 5 families. A total of 338 fish specimens were collected between May and August 2016. The most common family was Cyprinidae, represented by 3 species. Puntius chola was the most abundant species collected, while Ompok pabda was only represented by 1 specimen. It was concluded that O. pabda is endangered in the River Swat and conservation efforts are recommended.
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
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Food security and international fisheries management RMIT University
This document discusses international fisheries management and food security. It begins by covering the FAO's vision of sustainable food and agriculture, including its key principles and goals related to ending hunger and malnutrition, doubling agricultural productivity, ensuring sustainable food production systems, and conserving genetic diversity. It then discusses the status of world marine resources and fish as a source of protein globally before introducing regional fisheries management organizations and their role in managing tuna stocks and adopting conservation measures.
This document summarizes a study that analyzed the diversity of rRNA genes in the guts of adult and fingerling Mugil cephalus (flathead grey mullet) fish inhabiting an Egyptian Mediterranean estuary. Bulk DNA was extracted from the guts and the eukaryotic 18S rRNA gene, bacterial 16S rRNA gene, and archaeal 16S rRNA gene were amplified via PCR, cloned, and sequenced. Rarefaction analyses identified 11, 18, and 13 phylotype groups of rRNA genes for eukaryotes, bacteria, and archaea, respectively, in adult guts, and 6 and 11 phylotype groups for eukaryotes and bacteria in fingerling guts (archaea were not detected in
Diversity of Molluscan communities in Kondakarla Freshwater Lake, Visakhapatnam, Andhra Pradesh
Amaravathi D*, P S Raja Sekhar, Rama Rao K
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This study isolated endophytic bacteria from the seaweed Amphiroa anceps collected off the coast of India. 20 bacterial strains were isolated and their ability to inhibit common poultry pathogens like Vibrio, Streptococcus, and Yersinia pestis was tested. 8 strains showed sensitivity against the pathogens. The most effective strains, SW4 and SW20, had a minimum inhibitory concentration of 125 μg/ml against Vibrio. SW4 and SW16 inhibited Yersinia pestis at 250 μg/ml. The study was investigating the antibacterial properties of secondary metabolites from these endophytic marine bacteria.
This document provides information about upcoming events and projects from the Freshwater Biological Association (FBA). It summarizes:
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3) This month's issue of the journal Inland Waters is now published with articles available online to subscribers and members of the International Society of Limnology.
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.
The document discusses Vibrio parahaemolyticus, a halophilic bacterium that can cause foodborne illness. It is found in coastal waters worldwide and can cause gastroenteritis when consumed in raw or undercooked seafood. Key virulence factors include the thermostable direct hemolysin (TDH) and the TDH-related hemolysin (TRH), which are encoded by the tdh and trh genes, respectively. Strains containing these genes are more likely to be pathogenic. The Kanagawa phenomenon (KP) refers to beta-hemolysis observed on specialized media and is correlated with TDH production and pathogenicity. Outbreaks have occurred globally but are especially common in Asia where
This document provides an overview of marine plants, including microalgae like cyanobacteria, diatoms, and dinoflagellates. It discusses macroalgae divisions (green, brown, red algae), key genera within each (kelps, coralline algae), and their reproductive strategies. The document also notes the group's research on seaweed taxonomy, phylogeny, and natural products. Their work involves offshore cultivation methods, invasive algae, products derived from seaweeds, and freshwater/terrestrial algae groups like lichens and bryophytes. The marine environment and algae play an important role in oxygen production, carbon sequestration, and supporting ocean life.
This document discusses Vibrio parahaemolyticus, a halophilic bacterium that can cause foodborne illness. It is found in coastal waters worldwide. The document covers its taxonomy, characteristics, virulence factors like thermostable direct hemolysin (TDH), epidemiology, pathogenesis including the Kanagawa phenomenon, and differentiation from non-halophilic vibrios. TDH is a major virulence factor that causes beta-hemolysis on blood agar and is associated with pathogenic strains.
This document reports on the first record of the squat lobster species Munidopsis scobina off the Thoothukudi coast of the Gulf of Mannar in India. One specimen of M. scobina was collected from a depth of 305-310 meters during trawling operations. M. scobina is described and its key diagnostic features are provided. This extends the known distribution of M. scobina in the Indo-Pacific region. A number of other species previously collected off the Thoothukudi coast are also cited.
This document discusses a study on the length-weight relationship of Pearl spot (Etroplus suratensis) fish collected from Pulicat Lake in southeast India. A total of 120 fish ranging from 3.5 to 10.5 cm in length and 2.0 to 34.0 g in weight were measured. Regression analysis found the length-weight relationship to follow an allometric growth pattern. The slope value (b) was estimated to be 1.0368, indicating the weight does not increase cubically with length. Separate regression equations were calculated for males and females. The study provides baseline information that can be used for future research and population comparisons.
This document reports a new record of the crustacean species Calaxius acutirostris from waters off Thoothukudi, southeast coast of India. A single male specimen of C. acutirostris was caught incidentally at a depth of 310 meters by trawling in the region between 08o 53.6’N 78o 16’E and 08o 53.8’N 78o 32’E off the Thoothukudi coast. This represents the first record of the species C. acutirostris in Indian waters. The document provides details on the morphology and identification of the specimen, compares it to other species, and discusses its distribution and taxonomy within the family A
This document reports on a new record of two species of sea squirts - Herdmania momus and Phallusia nigra - found off the coast of Thoothukudi, India. Small numbers of each species were caught at a depth of 310 meters as bycatch. This extends the known distribution of both species to the southeast coast of India. The document provides taxonomic information on the species, including descriptions of physical characteristics that were consistent with prior classifications. It also discusses the wide geographic distributions of both species globally and notes this is an new record of their occurrence in Indian waters.
This document reports on the discovery of a new species of lamellated pen shell, Atrina lamellata, off the coast of Thoothukudi, India. A single specimen was collected from a depth of 310 meters and identified based on its morphological characteristics. This extends the known distribution of A. lamellata to include the southeast coast of India. Little is known about pen shell populations in this region. This study provides a first documentation and taxonomic identification of A. lamellata in the waters off Thoothukudi.
This document discusses the age and growth of the red toothed triggerfish (Odonus niger) off the coast of Thoothukudi, India. It analyzed samples collected from bottom trawls between 2008° 53.6'N latitude 78° 16'E longitude and 08° 53.8'N latitude 78° 32'E longitude. The von Bertalanffy growth parameters were estimated as L∞ = 283.90 cm and K = 0.75. Total mortality was estimated to be 1.07 and fishing mortality was 0.27. The exploitation ratio was estimated to be 0.25, indicating the stock is under fishing pressure. The estimated life span of O. niger appears to
1. A specimen of the heart urchin Maretia planulata was collected off the coast of Thoothukudi, India and represents a new record for the region.
2. M. planulata is widely distributed throughout the Indo-Pacific but has not previously been reported from western India.
3. The specimen was identified based on characteristics that distinguish M. planulata from similar species, including shallow frontal sinus, oval subanal fasciole, and extension of primordial plates.
This document describes an experiment on the induced breeding of Pangasianodon hypophthalmus (striped catfish) under hatchery conditions in Tamil Nadu, India. Researchers used synthetic hormones to induce spawning in mature brood fish and observed fertilization rates of 60-80%. They found the fertilized eggs increased slightly in diameter after fertilization and developed through early embryonic stages until the late C-cell stage in the hatchery. The timing and characteristics of different embryonic development stages are presented. The goal was to develop hatchery techniques for mass production of this species for aquaculture.
This document studies the length-weight relationship of Mugil cephalus, a species of grey mullet, collected from the Kovalam coast of Chennai, India. The slope value (b) estimated for both male and female M. cephalus was 1.0368, indicating allometric growth. The regression equation for females was Log W = -0.7292 + 1.0368 Log L. The growth was found to be significantly different between sexes. Comparing the slope value to other brackishwater fish species, it was concluded that the slope value of 1.0368 for M. cephalus is less than the typical value of 3, indicating their growth pattern differs from the
This document describes the discovery of a new specimen of the squat lobster species Munida curvipes off the coast of Thoothukudi, India. Key points:
- A single male specimen of M. curvipes was collected in deep water trawling between 305-310 meters deep, representing the first record of this species from the Indian mainland coast.
- The specimen matches the original description of M. curvipes. This extends the known distribution of the species eastward from the Gulf of Mannar to the Andaman Islands and south Pacific.
- This discovery increases the number of known squat lobster species in Indian waters to 52. It highlights the diversity of Munida in the
The document is a letter informing that the author will be speaking at the International Conference on Aquaculture and Fisheries from July 20-22, 2015 in Brisbane, Australia. It includes an abstract describing the first recorded finding of the squat lobster species Munida curvipes off the coast of Thoothukudi, India at depths of 305-310 meters during a December 2013 biodiversity study of the Gulf of Mannar. This extends the known distribution of the species from the Gulf of Mannar to the east of the Andaman Islands and further to the South Pacific Ocean off Chile. The discovery raises the total number of known squat lobster species in India to 52.
1. A new species of lobster, Scyllarus batei batei, was recorded off the coast of Thoothukudi, India.
2. A single specimen was collected as bycatch from a trawler operating in 310 meters of water between 08o 53.6’N 78o 16’E and 08o 53.8’N 78o 32’E.
3. This extends the known range of S. batei batei, which was previously recorded from the Arabian Sea and southwest coast of India, to the southeast coast of India in the Gulf of Mannar.
This document reports on a new record of the sea snail Cochlespira travancorica travancorica found off the coast of Thoothukudi, India. A single specimen was collected as bycatch from a trawler operating in 310 meters of water. This species had previously only been recorded from the southwest coast of India. The specimen matches the description of C. t. travancorica forma granulata. This new record extends the known distribution of this species to the southeast coast of India in the Gulf of Mannar.
This document reports a new record of the crustacean species Calaxius acutirostris off the coast of Thoothukudi, India. A single male specimen of C. acutirostris was caught at a depth of 310 meters as bycatch. This represents the first record of this species in Indian waters. C. acutirostris is a species of lobster in the family Axiidae. The document provides details on the morphology and characteristics of the specimen, compares it to similar species, and discusses its distribution, which now includes the southeast coast of India.
This document discusses the age and growth of the red toothed triggerfish (Odonus niger) off the coast of Thoothukudi, India. It estimates the von Bertalanffy growth parameters for O. niger as L∞ = 283.90 cm and K = 0.75 based on length frequency data. Total mortality (Z) was estimated to be 1.07 and fishing mortality (F) was 0.27. The natural mortality (M) was estimated to be 0.80. The exploitation ratio was estimated to be 0.25, indicating the stock is under fishing pressure. The length at first capture was close to the length that provides maximum yield per recruit. The lifespan of O
This document reports on the discovery of a new species of lamellated pen shell, Atrina lamellata, off the coast of Thoothukudi, India. A single specimen was collected from a depth of 310 meters and identified based on its morphological characteristics. This extends the known distribution of A. lamellata to include the southeast coast of India. Little is known about pen shell populations in this region. This study provides a first documentation and taxonomic identification of A. lamellata in the waters off Thoothukudi.
This document reports a new record of the crustacean species Calaxius acutirostris off the coast of Thoothukudi, India. A single male specimen of C. acutirostris was caught at a depth of 310 meters as bycatch. This represents the first record of this species in Indian waters. C. acutirostris is described and images of the specimen are provided. Previous records of the species are summarized, and the morphological features that distinguish it from similar species are discussed. This extends the known distribution of C. acutirostris to include the southeast coast of India.
1) A specimen of the sea urchin Maretia planulata was collected off the coast of Thoothukudi, India and represents a new record for the region.
2) M. planulata is widely distributed throughout the Indo-Pacific but has not previously been reported from the waters off India.
3) The specimen was collected at a depth of 310 meters and exhibits physical characteristics that confirm its identification as M. planulata, including shallow frontal sinus, oval subanal fasciole, and distribution of tubercles.
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Species of the Genus Munida Leach, 1820, (Crustaea: Decapoda: Galatheidae), Occurring off
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Vaitheeswaran Thiruvengadam
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Taxonomical studies on the Chirostylid and Galatheid lobsters of India are dealt with by Alcock (1894 and 1901),
Alcock and Anderson (1895), Doflein and Balss (1913a), George and Rao (1966), Rao (1974), Tirmizi and Javed
(1993), Thirumilu, (2011), Vaitheeswaran and Venkataramani , 2012; Vaitheeswaran, 2014; 2015). A total of 53
species (11 from Family: Chirostylidae and 41 from Family Munididae) are recorded, mostly from the deeper waters
of Lakshadweep Sea, Arabian Sea, Bay of Bengal and Andaman Sea, while a single galatheid lobster Munidopsis
regia Alcock and Anderson, 1894 and Munida curvipes has been reported for the first time in Indian coast at Gulf of
Mannar.
While examining the crustacean catches landed by larger trawlers, which operated in deeper waters off Thoothukudi,
one specimen of squat lobsters was obtained. On closer examination, it was identified as Munida semoni Ortmann,
1894 and it was new to Thoothukudi waters. Thus, the total number of squat lobsters from India now rose to 53. The
taxonomic and systematic position of the present species reported here is followed the new classification given by
Baba (2005) for the Superfamily Galatheoidea. The present record from Thoothukudi coast of Gulf of Mannar is the
first specimen from the coast of main land.
Superfamily: Galatheoidea Samouelle, 1819
Family: Galatheidae Samouelle Ahyong, 2010
Genus: Munida Whiteaves, 1874
Munida semoni Ortmann, 1894
Borradaile, 1900
Barnard, 1950
Kensley, 1981a
Macpherson and Baba, 1993
Macpherson, 1994; 1996a; 1999a; 2004
Baba, 2005
Figure 1 Location of Thoothukudi coast of Gulf of Mannar, Southeast coast of India
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2 Materials and Methods
2.1 Materials examined
One specimen (total length 52 mm; carapace length 17 mm; weighing about 5 gm) collected from Thoothukudi beach
between 08º35' 22.5" N lat. 78º27' 40.9" E long and 08º31' 91.2"N lat. 78º25' 32.7"E long at a depth of 305-310 m
(Figure 1), Thoothukudi district, TamilNadu, India (Figure 2;Figure 3; Figure 4; Figure 5; Figure 6). The reference
materials are deposited in the museum collections of the Department of New Drug Discovery (Marine Invertebrate
Division), RARBIO Energies Private Limited, Chennai, Tamil Nadu, India.
Figure 2 Munida semoni Ortmann, 1894
Figure 4 Munida curvipes BENEDICT, 1902
Note: Right cheliped, dorsal view
Figure 3 Munida semoni Ortmann, 1894 Carapace
Figure 5 Munida semoni Ortmann 1894-Ventral view of
cephalic region, showing antennular and antennal peduncles
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Figure 6 Munida semoni Ortmann, 1894
Note: Uppar part of Sternum
2.2 Distribution
The present record of this species is collected from the incidental by-catch in the trawl catch off Thoothukudi coast of
Gulf of Mannar from India. Munida semoni is widely distributed in the Indo-Pacific from Indonesia, New Caledonia,
Vanuatu and Futuna islands 180-440 m (Macpherson and Baba, 1993; Macpherson, 1996a; Macpherson, 1999b); Fiji
and Tonga, 135-417 m.
2.3 Diagnostics
The specimen examined agrees quite well with the original description and figures provided by Baba (1988) (Figure
2). Carapace, excluding rostrum, slightly longer than wide (Figure 3). Transverse ridges mostly interrupted.
Secondary striae present Epigastric region with row of 6 pairs of spines flanking 2 unpaired spines behind rostrum,
largest pair directly behind supraocular spines. Fourth thoracic sternite with several short arcuate striae; fifth to
seventh sternites without striae and granules (Figure 6). Pereopod 1 and 2 are absent.
2.4 Description
Ground colour of carapace and abdomen light orange, with large reddish spots scattered on dorsal surfaces. Rostrum
and supraocular spines light orange. Chelipeds and walking legs with reddish and whitish bands. Base of fingers
whitish; distal part of carpus, merus and hand reddish.
2.5 Remarks
The specimens examined agree quite well with the original description and figures provided by Baba (1988) (Figure
2), identical to Munida heteracantha Ortmann. In the type material examined of M. semoni, however, the granules on
the seventh thoracic sternite, characteristic of M. heteracantha are absent. M. semoni is close to M. oritea sp. Nov.
from the Philippines and M. striola sp. Nov. from Japan and Indonesia.
One specimen (total length 52 mm; carapace length 17 mm; weighing about 5 gm) collected from Thoothukudi beach
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between 08º35' 22.5" N lat. 78º27' 40.9" E long and 08º31' 91.2"N lat. 78º25' 32.7"E long at a depth of 305-310 m,
Thoothukudi district, TamilNadu, India. They show the second abdominal segment unarmed, the thoracic sternites
moderately squamate, the distomesial spine of the basal anternnal segment overreaching the third segment, and the
merus of the third maxilliped bearing a distinct spine on the extensor distal margin.
2.6 Colour
Ground colour of carapace and abdomen light orange, with large reddish spots scattered on dorsal surfaces. Rostrum
and supraocular spines light orange. Chelipeds and walking legs with reddish and whitish bands. Base of fingers
whitish; distal part of carpus, merus and hand reddish (Macpherson, 2004).
Acknowledgements
The author is thankful to Thiru M. Kathirvel, former Principal Scientist of Central Institute of Brackishwater Aquaculture (I.C.A.R.),
Chennai, for critical reading of the manuscript and helpful suggestion for its improvement. Dr. K. Baba, Professor, Kumamoto University,
Japan, has provided me with literature on squat lobsters taxonomy. I wish to thank Thiru. K. Deenadhayalan, my friend and Professional
photographer, Trichy, India, for their photograph of this specimen.
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