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Distribution and Trophic Pattern of Non-Native Fish Species Across the Liao River Basin in China

by Kangshun Zhao 1,3, Chao Li 2, Tao Wang 2, Bowen Hu 2, Min Zhang 2,* and Jun Xu 1,*
1
Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
2
College of Fisheries, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Water 2019, 11(6), 1217; https://doi.org/10.3390/w11061217
Received: 15 May 2019 / Revised: 27 May 2019 / Accepted: 5 June 2019 / Published: 11 June 2019
Controlling the invasion of non-native fish species necessitates a complete understanding of the distribution of these species and the key factors that influence such distribution. In order to research the situation of non-native fish and the relevant influencing factors in the Liao River Basin, we investigated and analyzed the characteristics of the distribution and the trophic levels of non-native fish species, as well their response to different types of factors in the basin. Nine non-native fish species were found during the investigation, and the trophic levels of these species ranged between 2.00 and 3.84. The results of generalized linear models indicate that the distribution of non-native fish species in the basin is mainly related to anthropogenic activities, socioeconomic development, and climate. The southeastern part of the Liao River Basin is conducive to the distribution of non-native fish species. Furthermore, on a spatial scale, we also found that the mean trophic level of non-native fish species was not correlated with anthropogenic activities and socioeconomic development in the Liao River Basin. By providing evidence for the links between non-native fishes and different types of factors, our study contributes to increasing the relevant references for and experiences in the early detection and management of non-native fishes on a basin scale. View Full-Text
Keywords: non-native fish; distribution; trophic level; Liao River Basin; environmental factors; socioeconomic factors; anthropogenic activities non-native fish; distribution; trophic level; Liao River Basin; environmental factors; socioeconomic factors; anthropogenic activities
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Zhao, K.; Li, C.; Wang, T.; Hu, B.; Zhang, M.; Xu, J. Distribution and Trophic Pattern of Non-Native Fish Species Across the Liao River Basin in China. Water 2019, 11, 1217.

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