Fish Biodiversity Status in The Kobadak River of Bangladesh: Present Status, Threats and Conservation Perspectives

Md. Jahangir Alam, Abdullah-Al-Hasan, Mst. Niloy Jaman, Md. Mahfuz Hassan, Abdullah Al Mamun Siddiqui, Seema Rani, Md. Atiqul Islam Mondal and Md. Habibur Rahman
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Md. Jahangir Alam: Department of Fisheries Management, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Abdullah-Al-Hasan: Department of Marine Fisheries and Oceanography, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Mst. Niloy Jaman: Department of Fisheries Technology, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Md. Mahfuz Hassan: Faculty of Fisheries, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Abdullah Al Mamun Siddiqui: Biological Oceanography Division, Bangladesh Oceanographic Research Institute, Cox’s Bazar-4702, Bangladesh.
Seema Rani: Biological Oceanography Division, Bangladesh Oceanographic Research Institute, Cox’s Bazar-4702, Bangladesh.
Md. Atiqul Islam Mondal: Department of Oceanography, Faculty of Marine Sciences & Fisheries, University of Chittagong, Chattogram-4331, Bangladesh.
Md. Habibur Rahman: Department of Oceanography, Khulna Agricultural University, Khulna, Bangladesh.

International Journal of Research and Scientific Innovation, 2025, vol. 12, issue 6, 196-206

Abstract: This study assessed the status of fish biodiversity in the Kobadak River basin of Tala Upazila, Satkhira, Bangladesh, from January to June 2024 at four locations. A total of 12,040 fishes (belonging 34 species, 19 families, and 9 orders) were identified, and data was collected through a structured questionnaire. The Shannon-Wiener Index and Simpson’s Index showed moderate to high species diversity and richness in the river basin, with values of 3.20-3.45 and 0.80-0.96, respectively. The findings indicated a moderate to high diversity, with Cypriniformes dominating (40.39%), followed by Perciformes (30.66%) and Siluriformes (21.68%). The most abundant species were Labeo rohita and Catla catla, while the least abundant Chitala chitala and Notopterus notopterus. Conservation status indicated that 58.82% of species are least concern, 23.53% near threatened, and 17.65% vulnerable. This research emphasized the ecological importance of the Kobadak River’s fish diversity and the necessity for sustainable management to protect its fish populations.

Date: 2025
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