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Title: Inferring the invasion mechanisms of the red swamp crayfish in China using mitochondrial DNA sequences
Authors: Yue, Gen Hua
Feng, Jian-Bin
Xia, Jun Hong
Cao, Su Yin
Wang, Chun Ming
Keywords: Science::Biological sciences
Issue Date: 2021
Source: Yue, G. H., Feng, J., Xia, J. H., Cao, S. Y. & Wang, C. M. (2021). Inferring the invasion mechanisms of the red swamp crayfish in China using mitochondrial DNA sequences. Aquaculture and Fisheries, 6(1), 35-41.
Project: 5020
Journal: Aquaculture and Fisheries
Abstract: The red swamp crayfish, Procambarus clarkii, is a native species in north-eastern Mexico and south-central USA. P. clarkii was introduced to China in 1929 and has been used as an aquaculture species in China since 1983. It currently exists in most of the provinces of China, but threatens local fish, crustaceans, aquatic plants and local freshwater ecosystems. We examined the genetic variation in partial mitochondrial ND2 gene of 831 individuals collected from 25 P. clarkii populations in 13 provinces of China to infer the expansion pathways and mechanisms. Six haplotypes were detected. All six haplotypes appeared in four populations in Nanjing and a population located near Nanjing whereas only 1–5 of the six haplotypes were present in other populations. These data suggest that the populations in Nanjing are probably the source of all other populations in China. There were no significant relationships between geographic distances and genetic distances in 25 populations, whereas significant relationship was found in four populations in Qinhuai River covering 50 km in Nanjing. These data suggest that the expansion mainly be human-mediated in large scale, and active disposal or non-anthropogenic passive dispersal might have played an important role in expansion at a smaller scale. In some places far away from Nanjing, several haplotypes existed, suggested multiple introduction events may have happened. Although aquaculture of this species could bring huge economic benefit, its potential to negatively affect native biota and entire ecosystems should not be ignored.
ISSN: 2468-550X
DOI: 10.1016/j.aaf.2020.04.003
Rights: © 2020 Shanghai Ocean University. Published by Elsevier B.V. This is an open access article under the CC BY license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SBS Journal Articles

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