Fish Diversity of Chalan Beel in Relation to Fish Sanctuary

The impact of a fish sanctuary on fisheries diversity was studied for two years in Chalan Beel, Tarash Upazila, Sirajganj district, where the established at end first year. Seine net (Berjal) used to collect data monthly basis. There were 42 species recorded from 8 orders and 18 families, including exotic species, Cyprinus carpiro Oreochromis mossambicus. Puntius puntio most common (18.38%), followed by Colisa fasciata (9.73%) Chanda nama (9.28%). order Cypriniformes (16 species) discovered be dominant order, accounting 47.78% total Perciformes (22.85%) Siluriformes (21.40%). Shannon-Weaver index (H) ranged between 2.26 2.66. average value higher (2.53) after than before (2.39). may have resulted an increase biodiversity catch. As result, establishment can expanded address gradual improvement diversity. J Bio-Sci. 30(1): 61-68, 2022 (June)