Length-weight relationships of seven fish species from the Yuan River, China

Abstract

Summary Length–weight relationships were determined for seven fish species (Culter oxycephaloides Kreyenberg & Pappenheim, 1908; Pseudobagrus tenuis Günther, 1873; Saurogobio dumerili Bleeker, 1871; Distoechodon tumirostris Peters, 1881; Pseudolaubuca engraulis Nichols, 1925; Liobagrus marginatoides Wu, 1930; and Parabotia bimaculata Chen, 1980) inhabiting the Yuan River, central China. Fishes were collected using gillnets and electroshock fishing techniques quarterly from January 2008 to December 2010. This study is first report the length–weight relationships for this seven fish species.

Length-weight relationships of three fish species from central China

“…Considering the 95% confidence limits and comparing with the calculation of the Bayesian confidence interval, the b values of all three species were within the expected range. However, the b value of C. oxycephaloides in the present study ( n = 34; b = 3.11) was higher than that of specimens from the same River ( n = 25; b = 3.09) (Xiong et al, ) and the Pengxi River ( n = 1,063; b = 3.08) (Que et al, ). LWR parameters may be influenced by a variety of factors such as number of sample, sex ratio, size of the fish, stages of growth, temporal and spatial distribution, gastro‐somatic index, stages of gonad maturity, ontogeny, climatic variability and general condition (Zhang et al, ); however, these factors were not considered in the present study.…”

“…Length‐weight relationship (LWR) is one of useful tools for fisheries research (Xiong, Zhu, Wang, & Ye, ; Xiong, Zhu, Xie, & Pan, ; Zhu & Yang, ). Fish diversity in the Yuanjiang River is very high, however, data on the LWRs of the ichthyofauna are scarce (Xiong, Zhu, Jin, & Zhang, ). In this study, the length‐weight relationships (LWRs) for three species ( Culter oxycephaloides Kreyenberg & Pappenheim, 1908, Liobagrus marginatoides (Wu, 1930) and Pseudobagrus tenuis (Günther, 1873)) were determined.…”

Length-weight relationships of four fish species from the Yellow River, China

“…Length–weight relationships (LWRs) provide useful information for fishery management for both applied and basic purposes (Wang, Tang, Ruan, Wang, & Xiong, ; Xiong, Zhu, Jin, & Zhang, ). The Yellow River is the second longest river in China (Yang et al, ).…”

Status, threats and the conservation of endemic species in the Yarlung Zangbo river basin

“…Fish sampling was conducted using a dip net (0.5 m in diameter, 1 m hand shank, mesh size 0.5 mm), gillnets (20 m × 5 m, mesh size 0.5 cm), and electrofishing (CWB-2000P, 12v, 250HZ). (For detailed methods for fish sampling, see Xiong Zhu et al 2017). We conducted visual encounter surveys and acoustic surveys for mammals, amphibians, reptiles and birds.…”