scholarly journals BOAL (WALLAGO ATTU) FISH ABANDONMENT IN KELEGHAI RIVER, WEST BENGAL: AN IDEA BASED CLARIFICATION

2021 ◽  
Vol 5 (1) ◽  
pp. 23-26
Author(s):  
Mrinmay Mandal ◽  
Nilanjana Das Chatterjee ◽  
Suddhasattwa Burman
Keyword(s):  
Freshwater Fish ◽  
Aquatic Ecosystem ◽  
Empirical Investigation ◽  
West Bengal ◽  
Fish Diversity ◽  
Qualitative Investigation ◽  
Sensitive Species ◽  
Wallago Attu ◽  
Chemical Pesticide ◽  
Anthropogenic Intervention

Aquatic freshwater fish diversity immensely declines from several native places in West Bengal. Lots of freshwater fish have been extricated and some become endangered or vulnerable in condition as well as in Keleghai river. Aquatic ecosystem meltdown or crisis due to anthropogenic intervention resulted disappearance of eco-sensitive species. Such, appearance of Boal (Wallago attu) fish in this river was very common but now it’s very amazing to see or to catch it. The number of this species decreased radically before some decades. The present study conducts an empirical investigation to find out the reasons are behind it. Lacking of printed information, the work concentrated on knowledge and perception of experienced fisherman for understanding the fact by interviewing method. After qualitative investigation, the study recommends that simplification of food web in this aquatic ecosystem is the major cause of abandonment of Attu fish in this river. Other important causes are advance unethical fishing techniques, habitat loss, and enormous use of chemical pesticide and fertilizer in wetlands.

scholarly journals Study of indigenous freshwater fish diversity of Bankura (West Bengal), India with special reference to Clarias batrachus

2018 ◽  
Vol 10 (4) ◽  
pp. 1162-1172
Author(s):  
Arindam Ganguly ◽  
Amrita Banerjee ◽  
Asish Mandal ◽  
Tapas Kumar Dutta ◽  
Pradeep Kumar Das Mohapatra
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
West Bengal ◽  
Clarias Batrachus ◽  
Fish Diversity ◽  
African Catfish ◽  
Hypophthalmichthys Molitrix ◽  
Local Markets ◽  
Wallago Attu ◽  
Bankura District

A study was conducted to determine the ichthyofaunal diversity in Bankura district of West Bengal. The area is traversed by major and minor rivers, feeder channels, numerous ponds, bills, reservoirs which have made this drought-trodden district as the highest producer of aquatic products within the state. Field survey was conducted in randomly selected local markets covering twenty-two blocks of Bankura. Fish sampling was carried out using various conventional fishing gears. The entire region harbours a wide variety of aquatic fishes. A total number of 92 indigenous fish species belonging to 30 families were identified during this study. The Cyprinidae family dominated the population with its 36 varieties followed by Channidae, Siluridae and Bagridae. Sonamukhi block situated in Shali basin; Sarenga and Raipur of Kangsabati basin; Dwarkeshwar and seven bundhs- enriched Bishnupur were the major habitats of small indigenous fishes. This paper also denotes presence of 12 globally endemic freshwater fish species viz. Hypophthalmichthys molitrix, Cyprinus carpio, Labeo nandina, Tor khudree, Chitala chitala, Bagarius bagarius, Wallago attu, Ompok pabda, Ailia coila, Anguilla bengalensis, Parambassis lala, Oreochromis mossambicus. The substitution of native Clarias batrachus with invasive African catfish C. gariepinus was observed in various local markets. Some traders even promote illicit farming of this banned species for their own profit. As a consequence, the indigenous, nutritionally-enriched C. batrachus is becoming more endangered.

scholarly journals Studies on fish diversity concerning Hydro-ecology of Kangsabasti river in Purulia district, West Bengal, India

2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Manab Kumar Saha
Keyword(s):  
Fish Species ◽  
Physicochemical Parameters ◽  
West Bengal ◽  
Monsoon Season ◽  
Fish Diversity ◽  
Riverine Ecosystem ◽  
Post Monsoon ◽  
Fish Catch ◽  
Purulia District

Fish diversity depends both on various physicochemical parameters and the biological components of the riverine ecosystem. During the study period from January 2017 to December 2019 the highest fish diversity and density were observed in post-monsoon and lowest in pre-monsoon season in the Kangsabati River, Purulia District of West Bengal. Twenty five fish species, associated with 19 genera, 10 families and 5 orders have been identified. It was recorded that the Cyprinidae was the predominant family, which represented 56% of the entire fish catch.

Avifauna of Patan Wetland, Murshidabad, West Bengal, India

2019 ◽  
Vol 18 ◽  
pp. 15-21
Author(s):  
Santi Ranjan Dey ◽  
Keyword(s):  
General Health ◽  
West Bengal ◽  
Sensitive Species ◽  
North West ◽  
Forested Area ◽  
Cultivable Land ◽  
Human Habitation ◽  
Fauna Composition ◽  
Conservation Plans ◽  
Wetland Resources

Biodiversity enumeration of ecologically sensitive species is important for estimating the general health as well as development of proper conservation plans for the entire ecosystem. ‘Patan beel’ an relatively unexplored wetland of North-West Murshidabad is located between latitude 24°2’4” North to 24°3’ 20’’North and longitude 88°1’18’’ East to 88°0’15’’ East. The approximately 500 acres wetland contains forested area, some human habitation, and low but cultivable land. The area is unique in flora and fauna composition. This study has revealed that ‘Patan beel’ contains 49 species of birds. Some of the birds are totally aquatic. Some are migratory in nature. To conserve and manage wetland resources, it is imperative to have inventory of wetlands and their aqua-resources.

Patterns in Freshwater Fish Diversity

2021 ◽  
Author(s):  
Peter van der Sleen ◽  
James S. Albert
Keyword(s):  
Freshwater Fish ◽  
Fish Diversity

Freshwater fish diversity hotspots for conservation priorities in the Amazon Basin

2020 ◽  
Vol 34 (4) ◽  
pp. 956-965 ◽  
Author(s):  
Céline Jézéquel ◽  
Pablo A. Tedesco ◽  
William Darwall ◽  
Murilo S. Dias ◽  
Renata G. Frederico ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Amazon Basin ◽  
Conservation Priorities ◽  
Fish Diversity

scholarly journals Implications of Dam Obstruction for Global Freshwater Fish Diversity

BioScience ◽  
2012 ◽  
Vol 62 (6) ◽  
pp. 539-548 ◽  
Author(s):  
Catherine Reidy Liermann ◽  
Christer Nilsson ◽  
James Robertson ◽  
Rebecca Y. Ng
Keyword(s):  
Freshwater Fish ◽  
Fish Diversity

Thelohanellus habibpuri sp. n. (Myxozoa: Bivalvulida) from the tropical freshwater fish rohu, Labeo rohita (Hamilton-Buchanan, 1882) in West Bengal, India: Light and electron microscope observations

2007 ◽  
Vol 57 (3) ◽  
pp. 293-300 ◽  
Author(s):  
Tanusree Dutta ◽  
Subhendu Acharya
Keyword(s):  
Freshwater Fish ◽  
West Bengal ◽  
Labeo Rohita ◽  
Polar Filament ◽  
Pectoral Fin ◽  
Filament Wound ◽  
Host Fishes ◽  
A New Species ◽  
Iodinophilous Vacuole ◽  
Tropical Freshwater

AbstractA new species of myxozoan (Myxozoa: Bivalvulida) Thelohanellus habibpuri sp. n. parasitic in tropical freshwater fish collected from the Habibpur, West Bengal, India is described in this paper. T. habibpuri was found in the Pectoral fin of Labeo rohita (Hamilton-Buchanan, 1882). The diagnostic characters of T. habibpuri are: generally oval milky-whitish plasmodia attached in the pectoral fin of host fishes; spore egg-shaped to ovoid with slightly tapering anterior and rounded posterior end, averaging 13.9 × 8.5 μm in size; a single oval-round polar capsule 6.0 × 4.9 μm in diameter, with polar filament wound in 3-4 coils. Finely granular sporoplasm containing two slightly oval nuclei (1.4 μm in diameter) and a small iodinophilous vacuole (3.0 μm in diameter) present in the spore.SEM study of this myxozoan reveals the anterior extremity of spore is truncated. The Cnidocyst discharge channel appear as a dark area. The longitudinal wavy surface are visible on the spore.

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