Study of the spawning season of Hilsa, Tenualosa ilisha in Bangladesh

An experiment was carried out on the reproductive biology of riverine populations Tenualosa ilisha in Bangladesh to identify peak breeding season using gonadal and gonadosomatic index (GSI) information, fry production potentiality, which will finally lead development strategies for conservation Hilsa fish species. Total 480 Samples were collected from Meghna River, Chandpur, July 2012 June 2013 Tentulia Barisal 2014. Both length (TL) Gonad (GL) measured a measuring scale, both Body weight (BW) (GW) taken an electric balance. To detect spawning activity hilsa River GSI Dobriyal (DI) calculated. The mean value female male found be varied 4.84±0.63 15.31±1.17 0.32±0.04 1.04±0.08, respectively, with highest October. In case 6.33±0.39 15.03±0.37 0.32±0.03 1.00±0.06, Mean DI Chandpur ranged 3.31±0.23 5.15±0.17 1.18±0.04 1.71±0.03 October highest. 3.63±0.15 5.00±0.12 1.70±0.03 results present study suggested that has prolonged season, but major takes place October–November, distinct October, indicating Bangladesh.