loading page

Non-native fishes in eight rivers of South China: species composition, distribution patterns, and potential influencing factors
  • +9
  • Dangen Gu,
  • fandong yu,
  • Yinchang Hu,
  • Jianwei wang,
  • Meng Xu,
  • Xidong Mu,
  • Yexin Yang,
  • Hui Wei,
  • Zhixin Shen,
  • gaojun li,
  • yannan tong,
  • Wenxuan Cao
Dangen Gu
Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences
Author Profile
fandong yu
Institute of Hydrobiology Chinese Academy of Sciences
Author Profile
Yinchang Hu
Chinese Academy of Fishery Sciences Pearl River Fisheries Research Institute
Author Profile
Jianwei wang
Institute of Hydrobiology, Chinese Academy of Sciences
Author Profile
Meng Xu
Chinese Academy of Fishery Sciences Pearl River Fisheries Research Institute
Author Profile
Xidong Mu
Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences
Author Profile
Yexin Yang
Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences
Author Profile
Hui Wei
Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences
Author Profile
Zhixin Shen
Hainan Academy of Ocean and Fisheries Sciences
Author Profile
gaojun li
Hainan Academy of Ocean and Fisheries Sciences
Author Profile
yannan tong
Hainan Academy of Ocean and Fisheries Sciences
Author Profile
Wenxuan Cao
Institute of Hydrobiology Chinese Academy of Sciences
Author Profile

Abstract

Non-native fish invasions are among the greatest threats to freshwater ecosystems worldwide. In South China, the same climatic conditions that facilitate the culture of some non-native fishes may also support their invasive potential. We conducted systematic collections of fish in eight main rivers of South China, from 2016 to 2018, to investigate and analysis species composition and the distribution of non-native fishes. The data reveal that non-native fishes are widespread in the sampled rivers: of the 98,887 fish collected, 11,832 individuals representing 20 species were not native. Of the non-native fish species, 17 are used in aquaculture and 19 are native to the tropics; 13 are omnivores while other seven are predators. Based on dissimilarity of the non-native fish species distributions across the eight rivers, the different rivers could be divided into four assemblages. Geographical isolation and temperature were identified as affecting the distribution patterns of non-native fishes, thereby influencing fish species composition, species number, dominant species, and distribution variations in the South China rivers. Species composition of the non-native fishes in the rivers in this region are related to their introduction vector, compatibility with their native habitat, and trophic position. And their distribution pattern was mainly influenced by the geographical location and temperature.

Peer review status:POSTED

01 Mar 2020Submitted to Ecology and Evolution
03 Mar 2020Assigned to Editor
03 Mar 2020Submission Checks Completed