Shape variation in the carapace of Chinese mitten crabs (Eriocheir sinensis H. Milne Edwards, 1853) in Yangcheng Lake during the year-long culture period
文献类型： 外文期刊
作者： Xue, J. 1 ; Liu, H. 2 ; Jiang, T. 2 ; Chen, X. 2 ; Yang, J. 1 ;
作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Jiangsu, Peoples R China
2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Fishery Ecol Environm Assessment & Resour, Wuxi, Jiangsu, Peoples R China
关键词： Yangcheng Lake; eriocheir sinensis; geometric morphometric analysis; landmark; ontogeny
期刊名称：EUROPEAN ZOOLOGICAL JOURNAL （ 影响因子：1.699； 五年影响因子：1.792 ）
ISSN： 2475-0263
年卷期： 2022 年 89 卷 1 期
页码：
收录情况： SCI
摘要： To evaluate whether ontogenetic development over the grow-out culture period can cause geographical plasticity of carapace shape in a certain region, geometric morphometric analysis was used, in this study, to determine the ontogenetic changes in the carapace morphology of Chinese mitten crabs (Eriocheir sinensis) originating from Yangcheng Lake, China, during a year of growth from coin-sized juveniles to market-sized adults. The morphological differences in the carapace throughout the year of culture were characterized using a 35-landmark point system. We used principal component analysis and linear discriminant analysis to determine morphological variation using thin-plate spline analysis and mesh deformation. During the growth process, the changes in the carapace were mainly concentrated in the third and fourth anterolateral teeth and on the M-shaped pattern. During the growth of male and female crabs throughout the year, the shape of the carapace changed considerably over the first six months. Afterwards, the shape of the carapace began to stabilize and could not be differentiated through discriminant analysis. This study is the first to use geometric morphometrics to analyze the ontogenetic changes in the carapace shape of E. sinensis crabs native to Yangcheng Lake. The results demonstrate that it takes a long time for the carapace morphology of native crabs to stabilize.
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