Life history traits of the critically endangered catfish eutropiichthys vacha (Hamilton 1822) in the Jamuna (Brahmaputra River Distributary) River, Northern Bangladesh

摘要: The critically endangered catfish Eutropiichthys vacha (Hamilton 1822) is one of the commercially high nutritional valuable food fish in Asian countries, but natural populations are seriously decreasing due to fishing pressure, leading an alarming condition and deserving conservation importance. Our study describes some biological parameters, including sex ratio, length-frequency distribution (LFD), length-weight relationships (LWRs), length-length (LLRs), factors (Allometric, KA; Fulton’s, KF; Relative condition, KR; weight, WR) form factor (a3.0) E. Jamuna (Brahmaputra River distributary) River, northern Bangladesh. A total 350 specimens ranging from 8.01-16.95 cm TL (total length) 1.70-30.38 g BW (body weight) were analyzed this study. Sampling was done using traditional gears during March 2010 February 2011. overall ratio showed no significant differences expected value 1:1 (χ2=2.57, p>0.05), there difference LFD between sexes (p=0.38). allometric coefficient b for LWR indicated isometric growth (~3.00) males combined sexes, negative ( 0.997; p<0.001). KR variations (F=65.11; p<0.01) male female; whereas, KF not significantly different (p=0.64). Also, WR 100 both (p<0.01), indicating imbalance habitat with availability relative presence predators vacha. estimated values a3.0 as 0.0060, 0.005 0.0054 males, females This reported first complete comprehensive description life-history traits Bangladeshi waters. These results should be useful sustainable fishery Bangladesh neighboring countries.