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Assessment of Fish Biodiversity in Basuakhali Beel Under Terokhada Upazilla, Khulna, Bangladesh

Md. Arifur Rahman
Department of Fisheries Biology and Genetics, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh

Amit Khamari
Faculty of Fisheries, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh.

Birinchi Mandal
Faculty of Fisheries, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh.

Md. Rahamat Ullah
Department of Fisheries Biology and Genetics, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh

Md. Belal Hossen
Department of Fisheries Biology and Genetics, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh

Md. Ariful Alam
Department of Fisheries Biology and Genetics, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh

Newton Saha
Department of Fisheries Management, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh.

Abstract/ Executive Summary:

The present study was carried out for a period of five months from July 2017 to November 2017 to assess the fish biodiversity applying diversity indices for existing fish species in Basuakhali beel under Terokhada upazilla, Khulna, Bangladesh. During the study, a total of 38 fish species including 34 native and 4 exotic fish species were recorded under 21 families belonging to 10 orders. Cypriniformes (31.58%) were found as the most dominant order followed by Perciformes (18.42%), Siluriformes and Channiformes (10.53%), Synbranchiformes and Decapoda (7.89%), Tetraodontiformes (5.27%), Beloniformes, Cyprinodontiformes and Osteoglossiformes (2.63%) respectively. Almost 57.89% of species were found least concerned, 13.16% near threatened, 10.53% vulnerable, 2.63% endangered and 15.79% were found not threatened in the biodiversity of Basuakhali beel. During the study period average Shannon-Weaver diversity index (H') value was highest in Rumer beel (2.38 ±0.10) and lowest in Gojalmari (1.40 ±0.15). Margalef richness index (d) value was highest in Rumer beel (3.69±0.58) and lowest in Abadh (1.55 ±0.31). Pielou’s evenness index (J’) value was highest in Abadh (0.49 ±0.13) and lowest in Kumromari (0.43 ±0.06). Pielou’s index (J´) showed the equal distribution pattern of fish species throughout the sampling area indicating a stable condition. Simpson dominance index (C) value was highest in Rumer beel (0.85 ±0.03) and lowest in Gojalmari (0.64 ±0.06). Eighteen different kinds of fishing gears were identified under 4 major groups including 5 nets (current jal, ber jal, thela jal, veshal jal and punti jal), 6 traps (guni, chari, charo, duor, tubo and polo), 4 hooks and line (koia borsi, dhun borsi, chip borshi and borshi), 3 wounding gears (koach, anta and jupi) in the beel. Besides, an inclusive management and conservation scheme is crying needed for the beel fishery to enrich the fish species diversity of the Basuakhali beel as well as the country.

Keywords: Fish biodiversity; Basuakhali beel; Biodiversity indices; Exotic species; Fishing gears.

Location: Khulna, Bangladesh

Start Date:

End Date:

Program Area: Conservation and Biodiversity

Commodity: Fish

Objectives:

The objectives of this study were to assess the fisheries diversity and fishing gears used in Basuakhali beel under Terokhada upazilla, Khulna, Bangladesh.

Methodology:

2.1 Study Area The study was conducted in five discrete points of Basuakhali beel in Terokhada Upazilla under Khulna. The study points were selected in such a way that these points cover all the major areas of Basuakhali beel, including different fishing points of the beel and various fish landing centers adjacent to Basuakhali beel. 2.2 Preparation of Interview Schedule The study was based on of primary data. Before collection of the primary data, a draft questionnaire was prepared which was verified with some fishermen’s. 2.3 Collection of Data During the collection of data only primary sources were considered. Primary data was collected from respondents on spot. The data were collected monthly basis from the study area. Several visits were made to collect the data. 2.5 Statistical Analysis SPSS software version V15.0 (Statistical Package for Social Sciences) was used for data arranging, summarization and processing for analysis. PAST (Paleontological Statistics) version 2.16 was used to assess biodiversity indices.

Source of Information: Asian Journal of Research in Biosciences 1(2): 55-64, 2019; Article no.AJORIB.139

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The biodiversity of beel fisheries of Bangladesh has become the ultimate threat in recent years. Due to diversified reasons, many species of fishes are disappearing from our country’s water bodies. The day is not too far when many of our fishes will be extinct in our water bodies. So, the findings of the study will be applicable to the management of this beel. The biodiversity of an area closely related to the local people livelihood, so the local authority related with Basuakhali beel should take essential steps to protect the biodiversity of the beel. Some beel management policies should be adopted to protect the species which are at the degree of extinction and to recover sustainable production of the beel. This is high time to protect the beel biodiversity. Moreover, national and international organizations should become forward to help conserving aquatic ecosystems and organisms.

Knowledge Management: Journal