MORPHOLOGICAL VARIATION AND DISTINCTION IN CULTURED AND WILD POPULATIONS OF PSEUDOSCIAENA CROCEA IN THE EAST CHINA SEA.

Autor: ZHU, K., WANG, H. Z., LU, K. X., ZHU, W. B.
Předmět:
Zdroj: Applied Ecology & Environmental Research; 2024, Vol. 22 Issue 3, p2065-2077, 13p
Abstrakt: The large yellow croaker (Pseudosciaena crocea), once a vital fishery resource in the East China Sea, has witnessed a substantial decline in its wild population towing to overfishing. The current resource circumstances mainly relies on artificial breeding, with limited contributions from wild populations. However, discriminating between wild and cultured populations of the large yellow croaker in market trade and parent fish selection remains largely dependent on experiential judgment, with precise and efficient discrimination methods lacking. In this study, the framework method was used to quantify the external morphological characteristics of wild and cultured populations. The differences in external morphology between the two populations were visualized using principal component analysis, and they were classified through stepwise discriminant analysis. Results revealed significant differences in the standardized morphological parameters among most large yellow croakers from these two populations. Additionally, their distributions on principal components 2 and 3 were dissimilar. Furthermore, significant sex-based differences were observed in the cultured population, whereas in the wild population, sex differences were comparatively minor. Cross-validation results revealed that the classification accuracy of distinguishing between different populations exceeded that for separating cultured or wild populations according to different sexes. These findings suggest that the framework method is effective for discriminating between cultured and wild populations of large yellow croaker, although it may not be as successful in distinguishing between individuals of different sexes in these populations. The outcomes of this research offer valuable support for large yellow croaker breeding initiatives. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index