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Present Status of Fish Availability in Ruhul Beel, Northern Bangladesh

SS Maya
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

MMR Mondol
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

Abstract/ Executive Summary:

This study was conducted in Ruhul Beel, Pabna, northern area of Bangladesh to know the availability of different fish species. Samples were collected fortnightly from the fishermen's catch captured in different points of the Beel during January to December 2013. During this study, a total of 37 fish species under 9 orders and 19 families were recorded from the study area. Cypriniformes was the most dominant order constituting 32.43% of the total fish populations followed by the Siluriformes (27.02%), Perciformes (21.62%), Channiformes (5.4%) and Clupeiformes (2.7%). On the contrary, Beloniformes, Cyprinodontiformes, Osteoglossiformes and Tetraodontiformes were the least numerous orders constituting only 2.71% each of the total fish populations. Among the available fish species, 37.84% were very rare, 35.14% were rare, and 21.61% were found throughout the year in a small amount while only 5.41% were available throughout the year in a large amount. About half of the fish species available in the Ruhul Beel is threatened to extinct according to IUCN Bangladesh. The results of this study will provide important baseline data on the availability of fish species, which will be helpful for the sustainable management and conservation of fisheries diversity in the Ruhul Beel as well as in the open water- bodies of Bangladesh.

Keywords: Bangladesh, Fish availability, Ruhul Beel, Threatened fish

Location: Ruhul Beel at Bhangura Upazila under Pabna district of the northern area of Bangladesh.

Start Date: 00-01-2013

End Date: 00-12-2013

Program Area: Conservation and Biodiversity

Commodity: Fish

Objectives:

This study was designed to investigate the fish species available in the Ruhul Beel, Pabna, northern area of Bangladesh.

Methodology:

The present study was conducted in the Ruhul Beel (24^o14'N and 89^o24'E) at Bhangura Upazila under Pabna district of the northern area of Bangladesh. The beel covers about 100 hectares in area and is one of the prime habitats for freshwater fishes in Bangladesh. Fish samples were collected fortnightly from the fishermen's catch captured in different points of the beel during January to December 2013. Fish were caught using Bhesal jal (Khara jal), Ber jal, Moi jal, cast net and monofilament fixed fill net. Collected fish samples were fixed in 10% formalin at the site and identification was done upon arrival at the laboratory based on their morphometric and meristic characteristics according to Talwar and Jhingran (1991) and Froese and Pauly (2011). Fish availability, threats to fish diversity and conservation needs were determined because of fish abundance during sampling, market survey, interviewing fishermen and fish cognate personnel using a pre-structured questionnaire. Fish availability was classified as TY (throughout the year), TYS (throughout the year in small amount), TYL (throughout the year in large amount), SM (found in small amount during monsoon), LM (found in large amount during monsoon), R (rare), VR (very rare) and NE (not evaluated).

Source of Information: J. Bio-Sci. 25: 39-44, 2017 ISSN 1023-8654

Article Link (Online Journal): http://www.banglajol.info/index.php/JBS/index

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It is imperative that many of the threatened to extinction fish species be still dwelling in the Ruhul Beel. Our preliminary survey showed that, abstraction of water for irrigation, use of agrochemicals in surrounding crop fields beside the beel, overexploitation and indiscriminate use of gears are the main threat for fish species conservation in the Ruhul Beel. Besides, there is only one-way management policy is to make a sanctuary in the deepest part of the beel, where fishing is completely banned. But this policy is not properly followed. The implementation of this sanctuary and some other beel management policy like, seed production, MACH (Management of aquatic resources through community husbandry), CBFM (Community based fisheries management), and integrated aquaculture technologies should be adopted to protect the species which are a degree of extinction and to recover sustainable production of the Ruhul Beel. For this purpose, the following immediate actions may be recommended such as the prohibition on harvesting brood fish, stocking of fish fry and ban of fishing by illegal gears. Therefore, it is most urgent to take the suitable steps to protect the fish fauna of Bangladeshi beel. In the light of the present study of Ruhul Beel, it is time to make proper policies and necessary steps to implement so that the future generation can get the fishes lively on the earth rather than photographs in literature.

Knowledge Management: Journal