Reproductive biology and gonadal cycle of Indian Potasi, Neotropius atherinoides (Bloch 1794) in Bangladesh

The present study was conducted to investigate the reproductive biology of Neotropius atherinoides in Bangladesh Fisheries Research Institute, Floodplain Sub-station, Santahar, Bogura, Bangladesh. A total number 70 fish samples were collected on monthly basis from Atrai River and Jamuna during period September 2021 August 2022. highest mean value gonado-somatic index (GSI) recorded July (12.55±2.50), whereas lowest found January (0.46±0.11). Highest individual fecundity (7000±1900) ova diameter (0.50±0.07 mm) also observed July. From histological observation ovary, early peri-nucleolar stage, late yolk vesicle granule stages identified where percentage (80%) mature oocytes Based GSI, fecundity, gonadal histology, breeding season N. May a remarkable peak In case length weight relationship (LWR), coefficient determination (r2) 0.95 slope b=1.02 which indicated pattern negative allometric growth this species as b<3. contrast, an increase associated with rise length, body weight, gonad showed significant linear relationship. This would assist development induced techniques provide valuable information for sustainable management population inland open ecosystem.