Abstract：In this study, 26 measurable traits were measured in two differential groups of hybrid yellow catfish Pelteobagrus fulvidraco ♀ × P. vachellii ♂ in order to analyze the morphological differences between two groups. Subsequent comparative analyses of the morphological characteristics were performed using the one-way analysis of variance, discriminant analysis, principal component analysis and cluster analysis. The results showed that 6 traits including adipose-caudal fin distance, caudal peduncle length, eye diameter, interorbital width, dorsal-fin spine length and pectoral-fin spine length were segregated significantly. Almost all individuals were divide into two groups using cluster analysis based on the morphological characters. The corrected eye diameter and caudal peduncle length were the most discriminative traits to differentiate these two groups. Significant negative correlation between caudal peduncle length and spine length was detected and significant positive correlation between eye diameter and interorbital width was detected. We inferred that the coevolution between different traits was of importance for the adaptation of yellow catfish. The finding provides novel insights into the breeding and identification of hybrid yellow catfish.
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2021, Vol. 40 
