孟加拉国西南部 Mathabhanga 河渔业多样性评估

Md Aslam Khan, M Golam Mortuza, M Nazrul Islam
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引用次数: 0

摘要

马塔班加河是孟加拉国西南部一条重要而著名的河流,因为它在渔业生产中发挥着重要作用,也是众多渔民的重要收入来源。这项研究于 2022 年 8 月至 2023 年 7 月进行,旨在揭示现有的水产资源及其组成,以及多样性、丰富度和均匀度指数。研究共记录了 57 种不同的鱼类,涵盖 8 目 22 科 42 属。其中,鲤形目在物种数量和观察到的个体方面都表现出最高的多样性。在栖息于 Mathabhanga 河的鱼类物种中,约 29.83% 在孟加拉国被视为濒危物种,其中 14.04% 被归类为易危(VU),14.04% 被归类为濒危(EN),1.75% 被归类为极危(CR)。多样性指数的总体值为 2.45 至 3.15,丰富度为 3.81 至 6.17,均匀度指数为 0.72 至 0.84。调查显示,Mathabhanga 河的鱼类生物多样性持续下降。这项研究建议,应通过以社区为基础的渔业管理、建立鱼类保护区、控制水污染、维护渔具以及实施《鱼类法》来管理渔业,从而实现 Mathabhanga 河鱼类生物多样性的可持续管理。Res.Res. Agric.Fish.第 11 卷第 1 期,2024 年 4 月:93-103 页
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of Fisheries Diversity in Mathabhanga River in the Southwestern Part of Bangladesh
Mathabhanga is an important and well-known river in the southwestern part of Bangladesh due to its role in fish production and as a vital income source for numerous fishermen. The study was carried out from August 2022 to July 2023 to reveal the existing aquatic resources and their composition, along with diversity, richness, and evenness indices. A comprehensive list of 57 distinct fish species has been documented, spanning across 8 orders, 22 families, and 42 genera. Within these, the Cypriniformes order exhibited the highest diversity in terms of both species count and observed individuals. Among the fish species inhabiting the Mathabhanga river, approximately 29.83% are considered threatened in Bangladesh, comprising 14.04% categorized as vulnerable (VU), 14.04% as endangered (EN), and 1.75% as critically endangered (CR). Overall values of the diversity index ranged from 2.45 to 3.15, richness was 3.81 to 6.17, and evenness index was 0.72 to 0.84. The investigation revealed that fish biodiversity in the Mathabhanga River has been steadily decreasing. This study suggested that fisheries should be managed through community-based fisheries management, establishing fish sanctuary, water pollution control, maintenance of fishing gear, and the implementation of the Fish Act for the sustainable management of fish biodiversity in the Mathabhanga River. Res. Agric. Livest. Fish. Vol. 11, No. 1, April 2024: 93-103
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