Ichthyofauna of the Katamadari River, Bangladesh: Composition, Conservation Status and Threats

Abstract

This research was carried out in the Katamadari River, which is located in the northern part of Bangladesh, to acquire information regarding the contemporary status of ichthyofaunal variation and their conservation. Over the course of a year from June 2020 to May 2021, a combined approach was adopted to collect data, which included collecting fish samples from fishers and fish traders as well as administering a survey. A total of 62 fish species were identified in the river, including three exotic species, and two prawn species. Out of ten observed orders, Cypriniformes, Siluriformes, and Perciformes were found to be the most dominant, consisting of 19, 16, and 14 fish species respectively. Fishes from Cyprinidae family were revealed to be the most abundant, accounting for about 27.5% of the total fish composition. Besides, among the thirteen common fish groups, catfish’s contribution was the highest followed by perches, carps, and barbs and minnows. However, almost a quarter of all fish species were under threatened category: seven vulnerable, eight endangered, and two critically endangered. Approximately 50% of the total fish species were examined to be rare and very rare. The current study also documented a range of anthropogenic as well as natural threats to the aquatic biodiversity of the river, all of which have devastating impacts. Ann. Bangladesh Agric. (2021) 25 (2) : 47-60

Freshwater icthyo-faunal checklist of Roktodaho Beel in Bangladesh: Threats and conservation

“…The plethora of this authentic fish range and output were earlier plentiful with many small indigenous species (SIS), which had enormous socioeconomic opportunities in Bangladesh (Haque et al, 2023). However, these days, these factors, along with degradation of habitat, overfishing, haphazard construction, changes in the environment, the emergence of disruptive alien species, contamination of water, and others, are progressively decreasing the quantity of this open natural fish variance and generation (Sayeed, 2010;Khan et al, 2018;Sultana et al, 2021;Pandit et al, 2021Pandit et al, , 2023bMia et al, 2022), except for certain fingerling stocked and co-managed water bodies (Aziz et al, 2021;Talukder et al, 2021;Kunda et al, 2022;Kamal et al, 2022;Pandit et al, 2023a). A few real-life forms are becoming extinct in specific water sources (Pandit et al, 2015).…”