Abstract：In order to understand the current status of fish resources in Zhangjiang River, the fish community structure, dominant species, species diversity, and their seasonal variations were surveyed at three sampling stations, including the confluence between downstream of the Fengtou Reservoir Dam and the Chexu River tributary, the confluence of the Huotian River tributary, and the fork of the North River and South River, in the middle and lower reaches of the Zhangjiang River in March (spring) and October (autumn) 2023 using gillnets and cage traps, and analyzed using species replacement rate, relative importance index, and diversity index, and the status of alien fish species was also researched. The results showed that a total of 28 fish species belonging to 6 orders, 14 families and 27 genera was found, with the most dominant in order Perciformes, followed by Cypriniformes in which 22 species were native fish, and 6 were alien fish. Alien fish accounted for 21.43% of the total species, 80.67% of the total quantity, and 65.22% of the total volume. The dominant species were shown to be Coptodon zillii, Sarotherodon galilaeus, Nile tilapia Oreochromis niloticus, Parachromis managuensis and silver carp Hypophthalmichthys molitrix. There were significant seasonal variations in fish community, with a species replacement rate of 60.71%, and only 11 species of fish found in both surveys. The Shannon-Wiener's diversity index, Margalef's species richness index, and Pielou's evenness index of fish species were all found to be higher in autumn than those in spring. Cichlidae fish constituted the main component of alien fish, with C. zillii and S. galilaeus ranking first and second, and the fact that alien fish are becoming the main group of fish led to significant changes in the fish community structure. The results of this study can provide scientific references for stock enhancement of fish, protection of native fish germplasm resources, and prevention and control of invasive alien fish.
方民杰, 吴立锋, 郭少鹏, 李雷斌, 温凭, 朱珉江. 漳江中下游鱼类群落结构及外来鱼类现状调查[J]. 水产科学, 2026, 45(5): 837-844.
FANG Minjie, WU Lifeng, GUO Shaopeng, LI Leibin, WEN Ping, ZHU Minjiang. Community Structure of Fish and Current Status of Alien Fish in the Middle and Lower Reaches of Zhangjiang River. Fisheries Science, 2026, 45(5): 837-844.
2026, Vol. 45 
