Length-weight relationships of eight fish species from mangroves of Guangdong, China

Abstract

Summary The length‐weight relationships were determined for eight fish species [Zebrias zebra (Bloch, 1787); Zebrias quagga (Kaup, 1858); Amblyotrypauchen arctocephalus (Alcock, 1890); Gerres japonicus Bleeker, 1854; Apogonichthyoides pseudotaeniatus (Gon, 1986); Setipinna tenuifilis (Valenciennes, 1848); Bregmaceros rarisquamosus Munro, 1950; Bregmaceros nectabanus Whitley, 1941] belonging to six families. Fish samples were collected using gillnets (20 × 10 m, mesh size 0.5 cm) and cage net (200 × 10 × 15 cm, mesh size 0.5 cm) from mangroves of Guangdong, China. Samples were collected quarterly from June 2015 to March 2017.The allometric coefficient (b) of length‐weight relationship varied from 2.76 for Zebrias zebra to 3.38 for Setipinna tenuifilis. Length‐weight relationships for these 11 fish species were determined for the first time.

Tilapia introduction in China: Economic boom in aquaculture versus ecological threats to ecosystems

“…In Guangdong, Guangxi, Yunnan, Hainan and Fujian provinces of China where tilapia is highly invasive, biotic diversity and endemism are high with therefore a high risk of negative ecological impacts on the native fauna. For instance, the freshwater fish diversity of Hainan Island and Leizhou Peninsula decreased rapidly with tilapia's invasion, 90 similar impacts have also been observed in Chinese mangroves 65,91,92 . In the Pearl River Basin in China, a significant negative correlation between tilapia introductions and native fish densities has been identified 77,78,84 .…”

“…30,31,84,[86][87][88][89] In Guangdong, Guangxi, Yunnan, Hainan and Fujian provinces of China where tilapia is highly invasive, biotic diversity and endemism are high with Leizhou Peninsula decreased rapidly with tilapia's invasion, 90 similar impacts have also been observed in Chinese mangroves. 65,91,92 In the Pearl River Basin in China, a significant negative correlation between tilapia introductions and native fish densities has been identified. 77,78,84 Nile tilapia's invasion was found to negatively affect native species richness, and river fisheries in southern China supported both by field and lab evidences.…”

Length-weight and Length-length Relationships of Farmed Catla catla during Winter Season from Muzaffargarh, Pakistan

“…Length-weight relationships (LWRs) provide useful information for fishery management for both applied and basic purposes (Xiong et al, 2018). LWRs are frequently demonstrated with linear regressions by using logarithm to predictor and response variables.…”

Length-weight relationships of three fish species from southwestern China

“…Length‐weight relationships (LWRs) provide important data for fisheries research (Pan et al, ; Xiong et al, ; Xiong, Zhu, Xie, & Pan, ; Zhu & Yang, ; Zhu, Yang, Liu, & Li, ). The ichthyofauna of southwestern China is extremely diverse (Kang et al, ).…”