Length-weight and length-length relationships of three fish species from the Heihe River, northwest China

Abstract

Summary Length‐weight (LWRs) and length–length (LLRs) relationships are reported for three fish species belonging to two families and two genera from the Heihe River, northwest China. Fish samples were collected using trap nets (mesh size 1 cm) in May and December of 2016, and April and October 2017. Standard length (SL) and total length (TL) for each individual were measured to the nearest 0.1 cm by digital slide caliper and each body weight (BW) was measured to an accuracy of 0.1 g using digital balance. The b‐values for LWRs varied from 2.580 to 3.164 (r2 > .956). The results further indicated that the LLRs were highly correlated (r2 > .991; p < .01). This study presents the first references on LWRs for Gymnocypris chilianensis and Triplophysa hsutschouensis, and LLRs for G. chilianensis, Triplophysa leptosoma and T. hsutschouensis. This biometric data and their relationships are relevant to the management and conservation of local fishes and fisheries.

Length‐weight relationships of three fish species from the Shule River in China

“…The values of parameter b remained within the expected range of 2.5-3.5 (Froese, 2006). The b values of the three fish species calculated in this study were different from those of other authors (Chen et al, 2017;Zhang et al, 2018). The differences in the b values may be due to differences in the number of samples, the effects of regional or seasonal differences, or just that the length ranges of the captured samples were different (Pan et al, 2014).…”

“…The Shule River is 540 kilometers long and has serves a drainage area of 20197 square kilometers. However, due to the construction of water conservation projects along the Shule River, the natural habitats of these fishes have been destroyed to various extents, and fishery resources have declined sharply (Chen et al, 2017;Du et al, 2021;Lou et al, 2020;Zhang et al, 2018). In this study, physical characteristics of three indigenous fish species in the Shule River were obtained and we provide the first published reference on length-weight relationships for three native fishes of the Shule River.…”

Integrated analysis of how gender and body weight affect the intestinal microbial diversity of Gymnocypris chilianensis

“…Gymnocypris chilianensis a freshwater fish of the Cyprinidae family and Gymnocypris genus, which is only distributed in the three inland river basins of the Hexi Corridor in the Gansu Province, known as the Heihe River, the Shule River, and the Shiyang River 1 . Therefore, It is an important indigenous economic fish and a key protected wild fish in this province 2 .…”