Length-weight relationships of six fish species from the Xiangjiang River in Guangxi region, China

This study aimed to estimate the parameters of length-weight relationships (LWRs) for six freshwater fish species that inhabit in the Xiangjiang River of Guangxi region, China. The specimens were sampled in April, July, and October 2014 and in January 2015 using electrofishing (CWB-2000P, China; 12 V import, 250 V export) and traps (mesh size 8.5 mm; length 200 m) at five sampling sites. For each sampling site, a trap was settled on one nearshore zone of the river for 24 hr, and the electrofishing was applied within 30 min from downstream to upstream with 200 m long. Standard length was measured (be accurate to 0.1 cm) and total weight determined (be accurate to 0.1 g) after preservation in formaldehyde (10%). The values for the parameter b of the length-weight relationships were estimated together with the coefficient of determination scores. In addition, this study provides a new tentative LWRs for the six species.

Automated summary

This study aimed to estimate the parameters of length-weight relationships for six freshwater fish species in the Xiangjiang River of Guangxi region, China. Samples were collected using electrofishing and traps at five sampling sites, and the values for parameter b and coefficient of determination scores were estimated. Additionally, new tentative LWRs for the six species were provided in this study.