Page 74 - 《水产学报》2025年第8期

万朝阳，等 水产学报, 2025, 49(8): 089306

Status and ecological risk assessment of alien fish in the Yangtze River basin

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WAN Chaoyang 1,2,3 , FANG Kang , DONG Fang , ZHANG Yingyu ,
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WU Jinming , MU Xidong , ZHANG Hui 1,2,3*
1. Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species, Ministry of Agriculture and Rural Affairs,
Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China;
2. Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture and Rural Affairs,
Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China;
3. College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China

Abstract: In order to assess the current status and ecological risks of alien fishes in the Yangtze River basin, we compiled a list
of alien fish species in the Yangtze River basin based on various sources, and the Aquatic Species Invasiveness Screening Kit
(AS–ISK) was used to evaluate the risk of alien fishes.The results showed that ① there are 38 species (belonging to 29 genera,
15 families and 8 orders) of alien fishes in the natural waters of the Yangtze River basin, including Cypriniformes (17 species),
Siluriformes (7 species), Perciformes(5 species), Acipenseriformes (4 species), Characiformes (1 species), Cyprinodontiformes
(1 species), Osmeriformes (1 species), Lepisosteiformes (1 species), the largest number of alien fish from Asia (17 species), and
most of the introduction purposes are aquaculture (20 species); ② alien fishes have been widely distributed in various rivers
and lakes in the Yangtze River basin, and the mainstream of the Three Gorges Reservoir has the largest number of species (22
species); ③ based on the basic risk assessment of the AS–ISK, 19 species of fish were classified as high risk, 6 species as
medium risk, and 13 species as low risk. The five species with the highest risk scores are Gambusia affinis, Hypostomus ple-
costomus, Oreochromis niloticus, Micropterus salmoides and Oreochromis mossambicus. The research shows that the alien
fishes in the Yangtze River basin present a large number of species and complex distribution pattern. Currently, no serious neg-
ative impact of alien fishes on the ecological security of the Yangtze River basin has been found, but the risk level assessment
results indicate that alien fishes have extremely high potential hazards. The results of this study can provide important data and
theoretical reference for the prevention and control and management of alien fish in China.
Key words: alien fish; risk assessment; Aquatic Species Invasiveness Screening Kit (AS–ISK); Yangtze River basin
Corresponding authors: MU Xidong. E-mail: muxd1019@163.com;
ZHANG Hui. E-mail: zhanghui@yfi.ac.cn
Funding projects: Hubei Provincial Natural Science Foundation for Outstanding Youth (2022CFA058); Open Fund Project of
the Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species of the Ministry of Agriculture and Rural
Affairs (20220302); Govern ment Procurement Service Project of the Yangtze River Basin Fisheries Supervision and Manage-
ment Office of the Ministry of Agriculture and Rural Affairs (CJBRKT2022-05)

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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