唐鱼野生种群和养殖群体的形态差异分析

Morphological variations between the wild population and hatchery stock of Tanichtys albonubes

2006-2007年,对从化市唐鱼资源进行了野外普查,共发现唐鱼自然栖息地8处,目前仅存在5处(另外3处破坏).本实验测量了5个地点的野生唐鱼种群与1个养殖群体形态度量性状和框架结构参数,采用逐步判别法对它们进行形态综合分析.结果表明:①在传统可量性状方面,5个野生种群和1个养殖群体在体高/体长、头长/体长比、尾柄长/体长比以及尾柄高/尾柄长比几方面差异极显著(P<0.01);②应用框架结构分别对唐鱼的养殖群体与5个野生种群共190尾标本的12个可量性状进行主成分分析,发现唐鱼野生种群与养殖群体在外部形态的整体大小上有明显的差异,并用判别分析对主成分分析结果的正确性进行了验证.

The wild population of Tanichtys albonubes in Conghua city were investigated between 2006 and 2007. In this paper, traditional morphological data and truss network data were combined to conduct principal component analysis （PCA） and stepwise discriminant analysis to study the morphological variations between the wild population and hatchery stock of Tanichtys albonubes. The results are showed as follows： ①In traditional morphological data ,the morphological variations are significantly different（ P 〈 0. 01 ）. ② In truss network data, through PCA with selected 12 morphological parameters, the identification accuracy are 95 - 100% （PCl） between the five wild population and one hatchery stock, synthetic identification accuracy are 100%.