Length-weight and length-length relationships of three fish species from the Yarlung Zangbo River in Tibet, China

Abstract

Summary Length–weight relationships and length–length were evaluated for three fish species (Schizopygopsis younghusbandi Regan, 1905; Ptychobarbus dipogon Regan, 1905 and Oxygymnocypris stewartii Lloyd, 1908) from the Yarlung Zangbo River in Tibet. Specimens were captured monthly using floating gillnets (mesh size 7.5 cm), bottom gillnets (mesh size 6.5 cm), and trap nets (mesh size 1.5 mm) from August 2008 to August 2009, March to August 2012, and March to April 2013. Regression coefficient (b) values of length–weight relationships (LWRs) ranged from 3.045 for P. dipogon to 3.193 for O. stewartii, whereas the a values ranged from 0.0040 to 0.0168 for O. stewartii and P. dipogon, respectively.

Length-weight relationships of two schizothoracinae fish species from the Maquan River, the upper reaches of the Yarlung Zangbo River, Tibet, China

“…In the fish of P. dipogon , the b value showed a significant difference from the report by Duan, Ma, Yang, Xie, and Huo (), and Liu, Ye, and Li ().Various factors (e.g. sample size, sex, gonad maturity, degree of stomach fullness and season) may affect the length‐weight relationships of fishes.…”