孟加拉国Dharla河鱼类多样性及其受威胁状况

Q3 Environmental Science
Md. Ashraful Alam, Y. Ara, I. Parvez, Jayanto Kumar Roy, M. Khan
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引用次数: 2

摘要

摘要河流生态系统的鱼类多样性由于不同的人为和自然灾害而减少。本研究调查了2018年1月至12月孟加拉国北部Dharla河(25.8103°N,89.6487°E)鱼类生物多样性现状。在这项研究中,根据多样性指数和受威胁状况(全球和地方)对达拉河现有的鱼类生物多样性状况进行了估计。数据是使用不同的渔具从河流的三个采样点和位于孟加拉国库里格拉姆区的三个选定的鱼类市场收集的。共鉴定出76种鱼类,隶属于8目26科57属。Cyprinidae是最具优势的科,有14种,其次是Danonidae(13种)、Bagridae(8种)和少数小科。除本地物种外,还记录了9种外来鱼类。Shannon Weaver多样性(H)、Pielous均匀度(e)和Margalef丰富度(D)指数分别为3.00至3.71、0.62至0.94和3.94至7.95。在76种本土物种中,有28种(37%)在孟加拉国被确定为受威胁物种,其中包括极度濒危(4种)、易危(9种)和濒危(15种)物种。通过投毒和破坏性渔具进行的不分青红皂白的捕捞被确定为对达拉河鱼类生物多样性的主要威胁。因此,这条河为受威胁的本地鱼类提供了相当大的支持。因此,需要采取必要措施,停止破坏性捕鱼,建立永久性鱼类保护区,并进行适当监测,以维持达拉河的可持续生物多样性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fish Diversity and Its Threatened Status of the Dharla River in Bangladesh
Abstract Fish diversity of a riverine ecosystem became reduced due to different manmade and natural calamities. This study investigated the present fish biodiversity status of the Dharla River located (25.8103° N, 89.6487° E) in the northern part of Bangladesh from January to December 2018. In this study, the existing fish biodiversity status of the Dharla River was estimated in terms of diversity indices and threatened status (both global and local). Data was collected from the three sampling sites of the river using different fishing gears and three selected fish markets located in the Kurigram district of Bangladesh. A total of 76 fish species were identified belonging to 8 orders, 26 families and 57 genera. The Cyprinidae was the most dominant family represented by 14 species followed by the Danionidae (13 species), Bagridae (8 species) and few minor families. Apart from the indigenous species, nine exotic fish species were also recorded. The Shannon-Weaver diversity (H), Pielous evenness (e) and Margalef richness (D) indices ranged from 3.00 to 3.71, 0.62 to 0.94 and 3.94 to 7.95, respectively. Out of 76 indigenous species, 28 species (37%) were identified as threatened in Bangladesh, which included critically endangered (4), vulnerable (9) and endangered (15) species. Indiscriminate fishing through poisoning and destructive fishing gears were identified as the major threats to fish biodiversity of the Dharla River. Thus, the river serves as considerable support for threatened indigenous fishes. Therefore, necessary steps are needed to stop destructive fishing, establish permanent fish sanctuaries and proper monitoring for maintaining sustainable biodiversity in the Dharla River.
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来源期刊
Ribarstvo, Croatian Journal of Fisheries
Ribarstvo, Croatian Journal of Fisheries Environmental Science-Ecology
CiteScore
1.10
自引率
0.00%
发文量
15
审稿时长
10 weeks
期刊介绍: The Croatian Journal of Fisheries was established in 1938 and today possesses a long-term tradition of publishing papers that deal with both freshwater and marine fisheries. Areas covered by the Journal include ichthyology, aquaculture, ecology and diseases of fish and other aquatic organisms, problems of open waters and other topics related to the fisheries field. Prior to publication, articles pass through rigorous review by senior scientists from around the world. The Journal features articles that reflect original research, interpretative content and subject matter of interest to the fisheries profession.
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