北黄海大泷六线鱼主要生物学特征比较研究

Comparison of Biological Characteristics of Hexagrammos otakii in the Northern Yellow Sea

运用主成分分析、聚类分析、多变量解析和单因子方差分析方法开展了北黄海丹东、大连及烟台3个海区的160尾大泷六线鱼(Hexagrammos otakii)7个分节特征和16个量度特征的比较分析。多重比较和单因子方差分析结果显示3个群体分别在3~6个形态特征上存在显著性差异。聚类分析结果显示3个群体间存在一定程度的分化,丹东群体与大连、烟台群体有明显差异。丹东群体在体长、体重、性腺成熟度等方面比大连、烟台群体高。而丹东群体体长-体重关系式(W=aLb)参数a,b及相关系数R也与其它两海区存在显著的差异。通过计算差异系数,根据Mayr等提出的75%规则,可以认为北黄海大泷六线鱼种群间已有一定程度的分化。

Seven meristic characters and sixteen morphological characteristics were measured and analyzed by using the principle component analysis method,cluster analysis method,multivariate analysis method and one-way ANOVA among three Hexagrammos otakii(160 individuals) populations collected from Dandong,Dalian and Yantai.The multivariate analysis and one-way ANOVA results showed that there were significant differences among the three populations in three to six morphological characteristics.The results of cluster analysis revealed that there were divergences among the three populations,i.e.,there were significant differences between Dandong population and Dalian,Yantai populations.Further,the Dandong population have dominance over the populations of Dalian and Yantai populations in length,weight and other biological characteristics.According to Mayr's 75% rule,there are some differentiations among the three populations of Hexagrammos otakii in the Northern Yellow Sea.