DECLINATION OF FISH BIODIVERSITY AND SOCIO-ECONOMIC STATUS OF THE FISHING COMMUNITY OF MATHABHANGA RIVER IN CHUADANGA DISTRICT OF BANGLADESH

Q2 Environmental Science

Open Ecology Journal Pub Date : 2023-06-01 DOI:10.59619/ej.5.1.5

F. Haque, Sharifa Marmita Noori, Jahid Hasan, D. Shaha

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Abstract

The Mathabhanga river has abundant fish resources, which plays a significant role in maintaining and replenishing the fish resources. The study was conducted from March to October, 2019 by a questionnaire survey and socio economic study of the fishermen in the Chudanga district. However, fish bio-diversity has rapidly declined in the Mathabhanga River. In this study, 44 fish species were found in the Mathabhanga River belonging to eight orders, 18 families and 29 genera. According to the IUCN Red List, 24.99% of fish species were threatened. Among the threatened species, 13.63% were vulnerable, 9.09% endangered and 2.27% were critically endangered. About 45% of fishermen were illiterate and housing condition of fishermen were dominated by tin-shed with bamboo (65%). A significant proportion of fishermen depend upon village doctors (62%) and 86% of the fishermen were far from power plants. Majority (45%) of fishermen were landless and 75% of fishermen were engaged in fishing as their main occupation whereas 65% of the fishermen had annual income between Tk. 35000 to Tk. 55000. In addition, overall values of diversity richness and evenness indices were found 1.12, 4.99 and 0.57,for vulnerable, endangered, and critically endangered species, respectively. These results indicated that dam construction and other human activities have seriously destroyed the fish habitat and led to the decline in fish diversity. Therefore, the conservation of fish has become urgent in the Mathabhanga River, and an integrated management plan should be developed and effectively implemented.

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孟加拉国chuadanga地区mathabhanga河渔业社区鱼类生物多样性的下降和社会经济地位

马塔班加河鱼类资源丰富，对维持和补充鱼类资源具有重要作用。该研究于2019年3月至10月对楚丹加地区的渔民进行问卷调查和社会经济研究。然而，马塔班加河的鱼类生物多样性迅速下降。在马塔班加河共发现鱼类44种，隶属于8目18科29属。根据世界自然保护联盟红色名录，24.99%的鱼类物种受到威胁。在受威胁物种中，易危物种占13.63%，濒危物种占9.09%，极危物种占2.27%。约45%的渔民是文盲，渔民的住房条件以竹制锡棚为主(65%)。相当大比例的渔民依赖乡村医生(62%)，86%的渔民远离发电厂。大多数渔民(45%)没有土地，75%的渔民以捕鱼为主要职业，65%的渔民年收入在3.5万至5.5万塔卡之间。此外，易危、濒危和极危物种的多样性丰富度和均匀度指数分别为1.12、4.99和0.57。这些结果表明，大坝建设和其他人类活动严重破坏了鱼类栖息地，导致鱼类多样性下降。因此，保护马塔班加河的鱼类已迫在眉睫，应制定综合管理计划并有效实施。

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Open Ecology Journal Environmental Science-Environmental Science (all)

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期刊介绍： The Open Ecology Journal is an open access online journal which embraces the trans-disciplinary nature of ecology, seeking to publish original research articles, reviews, letters and guest edited single topic issues representing important scientific progress from all areas of ecology and its linkages to other fields. The journal also focuses on the basic principles of the natural environment and its conservation. Contributions may be based on any taxa, natural or artificial environments, biodiversity, spatial scales, temporal scales, and methods that advance this multi-faceted and dynamic science. The Open Ecology Journal also considers empirical and theoretical studies that promote the construction of a broadly applicable conceptual framework or that present rigorous tests or novel applications of ecological theory.