Length-weight and length-length relationships of seven fish species from Irtysh River and its tributaries, northwest China

Abstract

Length–weight and length–length relationships are reported for seven fish species belonging to four families and seven genera from the Irtysh River and its tributaries, northwest China. A total of 1,351 individuals were collected using three layers of drift gill nets (inner mesh size 13 cm, outer mesh size 26 cm), set gillnets (mesh size 2.5 cm), and purse net (mesh size 1 cm) on a monthly basis from April to October 2013. One length–weight relationship, five length–length relationships, and two maximum lengths are presented for the first time in FishBase. This biometric data and their relationships are relevant to the management and conservation of local fishes and fisheries.