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首页> 外文期刊>Croatian Journal of Fisheries >Fish Diversity in the Andharmanik River Sanctuary in Bangladesh
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Fish Diversity in the Andharmanik River Sanctuary in Bangladesh

机译：在孟加拉国的Andharmanik河避难所的鱼多样性

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摘要

Loss of fish biodiversity, especially in the inland and coastal areas, is a major concern in sustainable fish production. Indiscriminate fish catch, climate change and many other anthropogenic activities synergistically affect fish biodiversity. To formulate a sustainable fish biodiversity conservation plan, fish biodiversity in the Andharmanik River, a 40-km-long Hilsa shad sanctuary in the southern part of Bangladesh, was assessed. The study was conducted to understand the status of fish species diversity through sampling in three sampling stations between December 2014 and November 2015. A total of 93 fish species were found belonging to 66 genera, 45 families and 14 orders. Perciformes (27.65%) was found to be the most dominant order, followed by Cypriniformes (20.21%), Siluriformes (21.28%) Clupeiformes (7.45%) Mastacembeliformes (4.26%) and Channiformes (4.26%). Out of the 93 fish species of the river, the percentage compositions of the vulnerable, endangered, critically endangered and not threatened were found to be 14%, 11%, 6% and 59%, respectively. Four population indices viz. Shannon-Wiener’s diversity index (H), Simpson’s dominance index (D), Simpson’s index of diversity (1-D) and Margalef’s index (d) were applied to demonstrate species diversity, richness and evenness of fish species in sampling areas, and the overall values of the indices were 2.70-3.51, 0.10-0.12, 0.88-0.90 and 7.84-8.19, respectively. The main threats to fish biodiversity were reviewed and the measures for fish biodiversity conservation of the river recommended. Indiscriminate fishing using biodiversity destructive gears, as well as losing hydrological and ecological connectivity with the surrounding habitats, were identified as major threats to biodiversity in the Andharmanik River. Effective sanctuary-based co-management, immediate actions for habitat enhancement to conserve and improve fish biodiversity in the river were recommended. Necessary steps to improve hydrological and ecological connectivity for habitat protection and elimination of all destructive fishing gears in order to conserve biodiversity in the Andharmanik River were also suggested.
机译：丧失鱼生物多样性，特别是在内陆和沿海地区，是可持续鱼类生产的主要问题。不分青红皂白鱼捕获，气候变化和许多其他人为活动协同影响鱼生物多样性。为了制定可持续鱼类生物多样性保护计划，评估了孟加拉国南部的40公里长的Hilsa Shad Sanctuary的Andharmanik River的鱼生物多样性。该研究是通过2014年12月和2015年12月之间的三个抽样站进行抽样来了解鱼类多样性的地位。发现93种鱼类属于66属，45个家庭和14个订单。发现Perciformes（27.65％）是最占主导地位的顺序，其次是Cypriniformes（20.21％），SiluRiformes（21.28％）Clupeiformes（7.45％）Mastacembeliformes（4.26％）和通道（4.26％）。在河流的93种鱼类中，发现脆弱，濒危，危及的且不威胁的百分比组成分别为14％，11％，6％和59％。四个人口索引。 Shannon-Wiener的多样性指数（h），辛普森的优势指数（d），辛普森的多样性指数（1-d）和Margalef的指数（d）被应用于展示采样区中鱼类种类的物种多样性，丰富性和均匀性，以及指数的总体值分别为2.70-3.51,0.10-0.12,0.88-0.90和7.84-8.19。审查了对鱼类生物多样性的主要威胁以及河流的鱼生物多样性保护措施。使用生物多样性破坏性齿轮的不分青红皂白钓鱼，以及与周围栖息地的水文和生态连接，被认为是Andharmanik河流中生物多样性的主要威胁。建立了有效的避难所的共同管理，建议对栖息地增强的立即行动保存和改善河流的鱼生物多样性。还提出了改善栖息地保护和消除所有破坏性渔具的水文和生态连通性的必要步骤，以便在安教里河河河中保护生物多样性。

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