Morphological difference and path analysis of Procambarus clarkia from Anhui Province
One-way analysis of variance,principal component analysis,cluster analysis,correlation analysis and path analysis were used to analyze the difference and path analysis of 7 morphological parameters such as body mass and body length of Procambarus clarkia cultured populations in 6 culture areas of Taihu and Changfeng,Anhui Province,so as to explore the correlation of morphology and factors affecting body mass of Procambarus clarkia cultured populations in different culture areas.The results showed that the ratio of morphological parameters was different in different regions,and the plumpness of the Anqing Susong population was the highest.Principal component analysis showed that the contribution rates of the two principal components of the male population were 37.8%and 22.4%,and the cumulative contribution rates were 60.2%,while the contribution rates of the two principal components of the female population were 40.5%and 20.9%,respectively,and the cumulative contribution rates were 61.4%.The cluster analysis showed that the Euclidean distance between the Anqing Susong population and other populations was far away,so it was classified into a single group.The correlation analysis showed that the correlation between individual traits and body weight of male was in the order of cuticle width>body length>cuticle length>belly width>cuticle height>belly length,while the correlation between individual traits and body weight of female was in the order of cuticle length>cuticle width>cuticle height>belly width>belly length.Path analysis showed that the morphological parameters measured in this study could not well interpret the relationship with body weight.In summary,the results showed that there were some morphological differences among Procambarus clarkii populations in different regions,but they could not effectively distinguish the populations and did not reach the subspecies level.Moreover,the selected morphological traits parameters were insufficient to describe the body mass,and the sample size and morphological traits parameters needed to be further enriched.
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