Length-weight and length-length relationships of Cirrhinus mrigala (Cyprinidae) and Xenentodon cancila (Belonidae) from the river Ganga

Abstract

Length-weight and length-length relationships are presented for two fish species collected during May 2015 to August 2016 from Narora site of the river Ganga. The parameters a and b of the length-weight relationships were estimated after the logarithmic transformation of the equation: W = aL^b. The lengthlength relationships were also estimated using linear regressions. The coefficients of determination (R²) values were >0.9 for both target fish species and linear regressions were highly significant (p < 0.001). Length-weight relationship indicated positive allometric growth pattern for Cirrhinus mrigala and negative allometric growth pattern for Xenentodon cancila. Length-length relationships for the selected fish species were also highly significant (R² > 0.9, p < 0.001).