Length-weight relationships of two native fish species from the upper reaches of Nujiang River, Southwest of China

Abstract

Summary The length–weight relationships (LWRs) were determined for two native cyprinid fishes: Poropuntius opisthopterus (Wu, 1977) and Raiamas christyi (Boulenger, 1920) collected from the upper reaches of Nujiang River (31°33′29″N; 92°55′58″E), Southwest of China. A total of 162 specimens were collected quarterly between March 2015 and November 2016. Fish were sampled by electrofishing in 12 wadable sites with maximum water depth 60–70 cm. The b values parameter in the length–weight relationship equations were calculated as 2.90 for P. opisthopterus and 3.45 for R. christyi. This study represents a new maximum standard length record for P. opisthopterus.

Length‐weight relationships of four fish species from the lower reaches of the Nujiang River and its tributaries in China

“…However, fish stocks continue to decline due to overfishing, biological invasion, environmental damage, and hydroelectric dam construction (Chen et al., 2015; Zhang et al., 2018). Recent studies have examined various biological and ecological aspects of native fish in the Nujiang River basin, e.g., growth characteristics and feeding habits (Deng et al., 2010; He et al., 2015; Huang et al., 2018; Jiang & Wang, 2018; Li et al, 2019; Pan et al., 2017; Peng et al., 2018; Zhang et al., 2018; Zheng et al., 2018); however the growth characteristics of many species remain unreported. In this study, the length‐weight relationships (LWRs) of four fish species were determined to provide basic data for further investigations on these populations and for fisheries management.…”