What is it about?
Aquatic biodiversity is declining day by day due to some manmade and natural causes. This study is an initial effort to evaluate the fish and shellfish diversity and their decline causes in the Rupsa River of Khulna in Bangladesh. However, factors identified in this study should be taken seriously and some actions like preventing water pollution, maintaining fishing gears, ensuring water flow, increasing fishermen’s awareness, implementing fisheries laws and establishing fish sanctuary have been coming out to conserve the diversity of the river.
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Why is it important?
Our findings show that there was a gradual reduction in the species diversity from previous 71 species to present 62 species with 12.68% declined by last 10 years. Average fish catch per fishermen per day reduced from 8.35 kg to 2.95 kg in last 10 years. Combined effects of some manmade and environmental factors are responsible for the loss of biodiversity in the river. This is the common situation in all open water wetlands of Bangladesh.
Perspectives
Counter and random surveys are suggested to crosscheck the fishes’ status and decline causes for their proper management and conservation.
Debasish Pandit
Sylhet Agricultural University
Read the Original
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Status of fish and shellfish diversity and their decline factors in the Rupsa River of Khulna in Bangladesh
, Archives of Agriculture and Environmental Science, September 2018, Agriculture and Environmental Science Academy,
DOI: 10.26832/24566632.2018.030304.
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