Landmark-Based Morphometric Identification of Mitten Crab Eriocheir from Suifen River
JIANG Xiaodong1,2,3, CHENG Yongxu1,2,4, YANG Yuhong3, WU Xugan1,2,4
1. Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai OceanUniversity, Shanghai 201306, China; 2. Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding,Shanghai Ocean University, Shanghai 201306, China; 3. College of Animal Science and Technology, Northeast AgriculturalUniversity, Harbin 150036, China; 4. National Demonstration Center for Experimental Fisheries ScienceEducation, Shanghai Ocean University, Shanghai 201306, China
Abstract：This study was conducted to compare the morphological characters of wild mitten crab Eriocheir collected from natural waters in Mudanjiang City, Heilongjiang Province, Zhenjiang City, Jiangsu Province, Beihai City, Guangxi Province, and Hyogo Prefecture in Japan, 15 male and 15 female samples at each sampling site, including Suifen River (SF) population from September to November 2017 and October 2018 with the wild Chinese mitten crab Eriocheir sinensis in Changjiang River (YZ) as well as the wild Japanese mitten crab E. japonicus in the Hepu Basin (HP) and the Hyogo of Japan (JP) in order to explore the current status of the wild mitten crab Eriocheir population in the Suifen River Basin. (1) The principal component analysis showed that SF and YZ individuals were slightly overlapped and divided into an independent group by the first two principal components, and that HP and JP individuals were divided into another independent group. (2) The thin-plate splines showed that morphological differences between populations mainly focused on frontal and lateral spines. (3) The stepwise discriminant analysis revealed that discriminative accuracies of SF and YZ individuals were 87%—93% and that the discriminative accuracy of HP and JP individuals was both 100%. (4) In the cluster analysis, SF and YZ individuals were clustered firstly, whereas HP and JP individuals formed another distinct cluster. In conclusion, the wild mitten crab in the Suifen River had closer morphological characters to the Chinese mitten crab based on landmark-based morphometrics analysis, but it still needs to be confirmed by molecular biological technique.
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2021, Vol. 40 
