Length-weight relationships of three catfish species from a tributary of the Dhaleshwari River, Bangladesh

Abstract

The present ichthyological report describes the length-weight relationships (LWRs) of three catfish species (Eutropiichthys murius, Nangra nangra and Gagata viridescens) belonging to two families from the Kaliganga River, a tributary of the Dhaleshwari River, Bangladesh. The analyses included 306 specimens collected monthly from fishermen's catches during October 2015 to April 2016. Ranges of regression parameters a and b of the three species were within 0.0058–0.0099 and 2.900–3.142, respectively with highly correlated coefficients of determination (r2 > .995; p < .001). The LWRs for all three species presented herein for the first time with a new maximum length record for N. nangra.