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The European Zoological Journal Volume 89, 2022 - Issue 1
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Research Article

Shape variation in the carapace of Chinese mitten crabs (Eriocheir sinensis H. Milne Edwards, 1853) in Yangcheng Lake during the year-long culture period

J. Xue1 Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, ChinaView further author information
,
H. Liu2 Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, ChinaORCID Iconhttps://orcid.org/0000-0002-7922-4407View further author information
ORCID Icon,
T. Jiang2 Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, ChinaView further author information
,
X. Chen2 Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, ChinaView further author information
&
J. Yang1 Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China;2 Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, ChinaCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0002-4445-6953View further author information
ORCID Icon
Pages 217-228 | Received 19 Aug 2021, Accepted 31 Jan 2022, Published online: 28 Feb 2022

Figures & data

Table I. Body measurements for the E. sinensis populations (mean ± SD)

Figure 1. Schematic diagram of E. sinensis; Carapaces of a. male and b. female crabs; Abdomens of c. male and d. female crabs. e. Map of landmarks on the carapace of E. sinensis and schematic diagram of the scaling standard. A and B are the widest parts of the carapace. f. Map of landmarks on the carapace of E. sinensis.

Figure 1. Schematic diagram of E. sinensis; Carapaces of a. male and b. female crabs; Abdomens of c. male and d. female crabs. e. Map of landmarks on the carapace of E. sinensis and schematic diagram of the scaling standard. A and B are the widest parts of the carapace. f. Map of landmarks on the carapace of E. sinensis.

Figure 2. Principal component analysis of the carapace morphology of E. sinensis from Yangcheng Lake; Principal component analysis scatter plots of a. male and b. female E. sinensis; Comparison of extreme value shapes from negative to positive for c. male and d. female E. sinensis (variation is enlarged by three times). The red line is negative extreme value shapes, while the black line is positive extreme value shapes.

Figure 2. Principal component analysis of the carapace morphology of E. sinensis from Yangcheng Lake; Principal component analysis scatter plots of a. male and b. female E. sinensis; Comparison of extreme value shapes from negative to positive for c. male and d. female E. sinensis (variation is enlarged by three times). The red line is negative extreme value shapes, while the black line is positive extreme value shapes.

Figure 3. Discriminant analysis scatter plot of Yangcheng Lake E. sinensis based on carapace morphology (95% confidence interval for ellipses); a. Male crab; b. Female crab.

Figure 3. Discriminant analysis scatter plot of Yangcheng Lake E. sinensis based on carapace morphology (95% confidence interval for ellipses); a. Male crab; b. Female crab.

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