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Present Status of Threaten Fish Species in Dharla River of Bangladesh

Md. Moniruzzaman*
Scientific Officer
Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

Md. Saiful Islam
Scientific Officer
Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

Abu Rayhan
Scientific Officer
Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

Md. Shahidul Islam
Scientific Officer
Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

Sonia Sharmin
Scientific Officer
Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

Anuradha Bhadra
Scientific Officer
Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

Abstract/ Executive Summary:

This study has been conducted to identify the threatened fish species and focus on fish biodiversity conservation in the Dharla River Lalmonirhat district. The present study was conducted for a time period of nine months (March-November, 2016). A total of 21 threatened fish species were identified in the river among them, 7 vulnerable, 11 endangered and 3 critically endangered species as well as 8 exotic fish species were found in the river. The fishing gears used by the fishermen in Dharla River includes 6 types of nets, 5 types of traps, 2 hooks and lines and 3 types of wounding gears whereas major fishing craft and gears were mainly wooden boat and seine net (locally called ‘jhaki jal’) respectively. Due to environmental degradation and manmade causes the biodiversity of this river decreasing day by day and it could be minimized by proper management and conservation techniques.

Keywords: Threatened fish, Dharla River, Biodiversity, Exotic fish, Lalmonirhat

Location: Dharla River Lalmonirhat district, Bangladesh

Start Date: 00-03-2016

End Date: 00-11-2016

Program Area: Conservation and Biodiversity

Commodity: Fish

Objectives:

The present investigation was undertaken to assess the present status of fish biodiversity in the Dharla River, Lalmonirhat district, to determine the availability of endangered (EN) and critically endangered (CR) fish species in the study; to know about the conservation status of available fish species., and to formulate recommendations for effective management strategies and protect threatened (critically endangered, endangered and vulnerable) fish species in the Northen part of Bangladesh.

Methodology:

Experiment site Data and sample collection were carried out mainly in fishing spots, fish markets and landing centers in and around Dharla River in Lalmonirhat district. Six study spots were selected under 6 villages in 3 Union of Lalmonirhat district. This study was conducted for nine months; from March to November, 2016. Frequent field visits (twice a month) were made during this time to collect necessary information. Collection of fish sample To record the fish diversity of Dharla River, fish species samples were collected and taking necessary information. The fish specimen samples were collected with the help of fishermen from fishing spot and from retailers of fish markets and landing centers. For this purpose, periodic visits were made in different spots of the study area. Species are classified by the IUCN Red List into nine categories, set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmentation. The term “Threatened” is a grouping of three categories such as Critically Endangered, Endangered, and Vulnerable. (IUCN Bangladesh. Data collection Data on overall availability of fishes from Dharla River were collected according to the questionnaire survey, field visit and fish market survey, fish 'arat' and fishing spots survey and from fishermen adjacent to river. Entries for different types of data were done using MS excel spreadsheet for the computational and statistical analyses of data.

Source of Information: International Journal of Applied Research 3(3),14-20 Sept. 2017

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Biodiversity, the incredible variety of life on Earth that sustains us, is in peril. Species are becoming threatened at the most expeditious rate ever recorded. Over the past few decades it has become the issue of global concern for its rapid reduction worldwide. Bangladesh is no exception in this regard. The objectives of this study were set to observe the threatened fish diversity and status of fish in Dharla River. Regarding the status of availability of threaten fish species in this study areas a total of 21 threatened fish species were identified in the river among them, 7 vulnerable, 11 endangered and 3 critically endangered species. So it is necessary to improve the habitat by following the national policy planning authorities should recognize the necessity for conservation of biodiversity and ensure multisectoral coordination for it. Government agencies involved in biodiversity conservation should be strengthened and new agencies should be created wherever necessary, agencies for the survey of fauna and microorganism.

Knowledge Management: Journal