Length-weight relationships of three fish species from the Yalong River, China

Abstract

Summary Length–weight relationships (LWRs) were determined for three fish species (Gymnodiptychus pachycheilus (Herzenstein, 1892), Triplophysa bleekeri (Sauvage & Dabry de Thiersant, 1874) and Triplophysa pseudostenura (He, Zhang & Song, 2012)) from the Yalong River in China. Samples were obtained between March 2009 and July 2013 using gillnets (25 × 12 m, mesh size 0.5 cm) and fish cages (0.5 × 0.5 × 10 m, mesh size 0.5 cm mesh). For each species, the sample size, length range, weight range, LWR, 95% confidence intervals of a and b, and coefficient of correlation were determined. Prior to this study, the LWRs for these three species were unknown.

Length-weight relationships of eleven fish species from the middle reaches of Jinsha River, southwest China

“…There were differences in b ‐values calculated in the present study for some fish species when compared with those of other authors (e.g. Bao et al., ; Wang et al., ; Wu et al., ; Zhang et al., ; Liu et al., ). Differences in the LWR can be attributed to several factors: (i) the number of specimens examined, (ii) area/season effect, and (iii) differences in the observed length ranges of the specimens caught (Moutopoulos and Stergiou, ; Franklin et al., ; Sani et al., ).…”

Length-weight relationships of six fish species from the Zengqu River and the Ouqu River, southwest China

“…The b value of S. malacanthus (3.315) and T. stolioczkae (3.464) in the present study were higher than estimated ( S. malacanthus , 2.97; T. stolioczkae , 3.09) by Bayesian LWR for the same species or subfamily body shape (Froese and Pauly, ). The b value of S. wangchiachii in the present study (3.086) was higher than that of specimens from the Yalong River (3.054) (Zhang et al., ). The b value of S. malacanthus (3.315) was higher than those reported for the Yalong River (2.852) (Zhang et al., ).…”

“…The b value of S. wangchiachii in the present study (3.086) was higher than that of specimens from the Yalong River (3.054) (Zhang et al., ). The b value of S. malacanthus (3.315) was higher than those reported for the Yalong River (2.852) (Zhang et al., ). Differences in b values can be resulted from a combination of factors: (i) differences in the number of specimens examined, (ii) area/season effect, (iii) differences in the observed length ranges of the captured specimens (Pan et al., ).…”

“…Little information on length–weight relationships was available for these six fish species. Only the length–weight relationships of S. wangchiachii , and S. malacanthus in the Yalong River were available (Zhang et al., ); prior to this study, there were no reports for the Zengqu and Ouqu rivers. We provide here the first published references on length–weight relationships for six fish species from the Zengqu and Ouqu rivers.…”

Length-weight relationships of five fish species from the Yalong and Wujiang rivers (tributaries of Yangtze River, China)

“…The Yalong and Wujiang rivers are two important rivers of the Yangtze tributary and are important for local fisheries. These rivers also have a rich fish fauna, which is not well investigated (Liu et al., ; Zhang et al., ). With this study we wish to contribute to the basic knowledge on the biology of five species collected over a period of a decade and for which LWRs were not yet available: Folifer brevifilis (Peters, 1881), Pelteobagrus ussuriensis (Dybowski, 1872), Schistura fasciolata (Nichols & Pope, 1927), Triplophysa daqiaoensis (Ding, 1993) and Triplophysa orientalis (Herzenstein, 1888).…”