Studies on geo-morphology, ecology and fish production of the 92 rivers of Rajshahi Division, Bangladesh

作者：Md. Khalilur Rahman, Jubaida Akhter, Akhery Nima, Sakib Ahmed, Mazid · 发表于：AquaDocs (United Nations Educational, Scientific and Cultural Organization) · 年份：2003 · 被引用次数：7 · 研究领域：Fish Biology and Ecology Studies、Fish Ecology and Management Studies、Fisheries and Aquaculture Studies

Geo-morphology, ecology and fish production of the 92 rivers of Rajshahi division have been presented in this paper. Fifteen rivers are dead and 11 rivers have severe erosion problem. Siltation has increased in 66 rivers and depth has decreased in 11 rivers. Sixty nine rivers are suffering from low flow conditions. Fish diversity has decreased in 20 rivers while fish production has declined in 75 rivers. A total of 31 fish species have extinct, 25 species are under threat of extinction and 43 species have low production. Siltation and pollution are the major causes of fish habitat loss. Recommendations are made to protect and conserve fish habitat and riverine fisheries of Rajshahi division.