Growth, maturity, condition, size at sexual maturity and mortality of the Banded gourami Trichogaster fasciata from the Ganges River, Northwestern Bangladesh

The present study depicts the first comprehensive description on population structure, growth pattern (length-weight relationships, LWRs and length-length LLRs), condition factor (allometric, KA; Fultonʹs, KF; relative, KR relative weight, WR), maturity (size at sexual maturity; Lm), form (a3.0) natural mortality (Mw) of Trichogaster fasciata (Bloch Schneider, 1801)in Ganges River, Northwestern Bangladesh. In addition, asymptotic weight (Wα), a3.0, Lm Mw this fish species from worldwide different water bodies were calculated based maximum total length. Samples T. collected fisher’s catch August 2015 to July 2016 using cast net (mesh size ranges: 1.5 - 2.0 cm). For each individual, length (TL) body (BW) measured digital slide calipers electronic balance with 0.01 cm g accuracy, respectively. A 278 individuals analyzed, where minimum TL 3.3 9.9 cm, respectively BW was 1.1 22.04 g, correspondingly. highest number (32.4%) its stands 6.0 7.0 group. b value LWR indicated negative allometric growth. Fulton′s (KF) is best WR showed significant dissimilarity 100, signifying balanced habitat for in River. a3.0 0.0214, 5.91 1.35 year-1 These findings will be very effective sustainable management River connecting ecosystems.