Morphological changes of silver and bighead carp in the Yangtze ...
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J.1141.2010. 06651. Morphological changes of silver and bighead carp in the. Yangtze River over the past 50 years. YU Hong-Xia, TANG Wen-Qiao*, LI Si-Fa.
动
物
学
研
究
2010,Dec. 31(6): 651−656
Zoological Research
CN 53-1040/Q
ISSN 0254-5853
DOI:10.3724/SP.J.1141.2010. 06651
Morphological changes of silver and bighead carp in the Yangtze River over the past 50 years YU Hong-Xia, TANG Wen-Qiao*, LI Si-Fa (Laboratory of Ichthyology, Shanghai Ocean University, Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai 200090, China)
Abstract: Multivariate analysis was adopted to analyze 30 morphometrical characteristics of 121 one-year-old juvenile silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis) bred during the 1950s (“the former population”) and 2008 (“the current population”) and collected from the middle reach of the Yangtze River. The average discriminant accuracies of the former and current silver and bighead carp population were 94.2% and 98.0%, respectively. Discriminant analysis also revealed that significant differences in morphology occurred between the former and current populations of both carp in overall characteristics. One-way analysis of variance indicated that between former and current populations, silver carp showed highly significant differences (P