Evaluating the size at sexual maturity for 20 fish species (Actinopterygii) in wetland (Gajner Beel) ecosystem, north-western Bangladesh through multi-model approach: A key for sound management

Effective fisheries management depend on having an exact assessment of biological parameters, including growth reproduction, size at sexual maturity ( L m ), and stock assessment. The purpose this research was to estimate the ) for 20 fish species belongs 14 families from a wetland (Gajner Beel ecosystem in north-western (NW) Bangladesh through multi-models such as length max based empirical model, gonadosomatic index (GSI)-based logistic model using commercial catches January December 2018. Also, we assessed other water-bodies worldwide. Specimens’ total (TL) noted up 0.1 cm measuring board body weight (BW) gonad (GW) weighed by digital electronic balance with 0.01 g accuracy. To assess , maximum model; relation between TL (total cm) vs. GSI (gonadosomatic %); were considered. minimum 4.64, 3.90, 4.15 Chanda nama Hamilton, 1822 25.33, 24.50, 24.70 Channa striata (Bloch, 1793) GSI, logistic-based models, respectively. From these three mean 4.23 C. 24.84 . 50.0% 8.80 TL. We also calculated different bodies water This study generated data 17 new among species, which are globally absent. Therefore, will help develop sustainable strategies, conservation implementation mesh ).