长江水系中华绒螯蟹背甲几何形态的产地差异

doi:10.16378/j.cnki.1003-1111.21256

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Abstract In order to effectively identify the morphological differences of Chinese mitten crab Eriocheir sinensis in the middle and lower reaches of the Changjiang River system, geometric morphometric analysis was conducted to comparatively understand the carapace morphological characteristics of the crab from seven different well-known geographical origins, i.e., the Datong Lake in Hunan Province. the Huangpi Lake, Tuo Lake, Nvshan Lake, and Wuwei section of the Changjiang River in Anhui Province, as well as the Qin Lake and Shijiu Lake in Jiangsu Province. After computer software-mediated image processing, 35-landmarks were extracted and discriminant analysis was carried out. The morphological variation vector was visualized by thin plate spline analysis and mesh deformation. The results revealed that the carapace morphological characteristicsof the crab from the aforementioned origins differed from each other. In comparison with the average carapace shape, although no significant variation was found in that of Wuwei wild population, significant differences were documented in those from the other six origins, i.e., with longer frontal and lateral teeth, smaller M pattern, and smaller posterior edge of carapace for those from the three lake origins of Anhui Province.For the crab from the remaining three lake origins, the frontal and lateral teeth were shorter, the M pattern was larger, and the rear margin area of the posterior edge of carapace was wider. Moreover, the identification accuracies were as high as 100% according to geometric morphometric landmarks of both female and male crab among different origins. Our study demonstrated that geometric morphometric analysis could provide a convenient, fast, nonlethal and innovative approach for geographical origin traceability at thefine-scale and protection of E. sinensis.

Key words： Eriocheir sinensis geometric morphometric analysis landmark geographical origin traceability

Received: 22 December 2021

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	TANG Jing
	XUE Junren
	LIU Hongbo
	JIANG Tao
	CHEN Xiubao
	YANG Jian

Cite this article:

TANG Jing,XUE Junren,LIU Hongbo, et al. Differences in Carapace Geometric Morphometrics of Eriocheir sinensis from Various Geographical Origins in the Changjiang River System[J]. Fisheries Science, 2023, 42(5): 775-784.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.21256 OR https://www.shchkx.com/EN/Y2023/V42/I5/775

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