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Status and Decline Causes of Fish Diversity of Baral River, Natore, Bangladesh

Fawzia A. Flowra
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

M. Ariful Islam
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

Syeda N. Jahan
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

M. Afzal Hussain
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

M. Manjurul Alam
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Bangladesh

Fathi A. Bashir
School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, D. E., Malaysia

A. Ghaffar Mazlan
Marine Ecosystem Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D. E., Malaysia

K. Das Simon
Marine Ecosystem Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D. E., Malaysia

Abstract/ Executive Summary:

The objective of this study was to describe the status and decline causes of fish diversity in ?Baral river, Natore, Bangladesh. The study was conducted over a period from November 2010 to May 2011 on the Bagatipara point of Baral river, Natore, Bangladesh. A total of 60 fish species of nine orders and 21 families were identified. On the basis of availability the species were categorized in four statuses that obtained as available (45%), less available (33.33%), rare (13.33%) and very rare (8.33%). Result of the study identified five species as very rare which may extinct near future resulting declination of the fish diversity. Few man made decline causes like agro-industrial wastages, different obstacles of water flow, excess use of river water, siltation and over fishing were observed as major threats for the diversity of fishes. The present work recommends preventing water pollution, ensuring water flow, developing fishermen’s awareness, implementation of fisheries laws and declaration of fish sanctuary to save fish diversity of the study area. Besides, counter and random survey is recommended to cross check the fishes’ status for their proper management and conservation.

Keywords: Fish diversity, Inland fishery, Threatened fish, Baral river, Bangladesh

Location: Natore, Bangladesh.

Start Date: 00-11-2010

End Date: 00-05-2011

Program Area: Conservation and Biodiversity

Commodity: Fish

Objectives:

To assess the status and decline causes of fish diversity in Baral river, Natore, Bangladesh.

Methodology:

The study was conducted over a period of seven months from November 2010 to May 2011 at the Bagatipara point covering 23.80 km area (24° 19′ 48″ N, 88° 56′ 42″ E) of Baral river, Natore, Bangladesh. Specimens were collected fortnightly during daytime and preserved in 10% formalin to save from spoilage. The specimens were identified to the species level. The species were then categorized in four statutes on the basis of interview and catch records of 180 fishermen as follows: Available (A): species observed throughout the year; Less Available (LA): species observed infrequently; Rare (R): species observed periodically; and Very Rare (VR): species observed fortuitously. Self observation and eyewitness methods were applied to collect the data regarding the decline causes of fishes. The findings were cross-checked carefully.

Source of Information: AACL Bioflux, 2013, Volume 6, Issue 4, 352-357

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Result of the study identified five species as very rare which may extinct near future resulting declination of the fish diversity. Few man made decline causes like agro-industrial wastages, different obstacles of water flow, excess use of river water, siltation and over fishing were observed as major threats for the diversity of fishes. The present work recommends preventing water pollution, ensuring water flow, developing fishermen’s awareness, implementation of fisheries laws and declaration of fish sanctuary to save fish diversity of the study area. Besides, counter and random survey is recommended to cross check the fishes’ status for their proper management and conservation.

Knowledge Management: Journal