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采用形态框架数据阐明了中国3个现存的淞江鲈地理种群的形态差异。每条鱼测量22个形态度量参数,用Burnaby的多变量方法校正形态度量参数,采用聚类和判别分析来区别种群的差异。结果显示:1)3个地理种群可以分成两组,第1组包括青龙河种群和富春江种群,第2组包括鸭绿江种群;2)根据F-remove值,挑选出最大的5个形态参数:D(2-3)、D(7-9)、D(6-5)、D(6-8)、D(2-1),用挑选后的5个形态参数进行判别分析的判别准确率达100%,显示这3个地理种群是形态上可辨别的种群。地理隔离和环境因子也许是淞江鲈种群形态差异的主要影响因素。虽然形态度量对于判别淞江鲈的种群有效,但对于其种群结构的进一步确认研究是必要的。
Morphological framework data were used to illustrate the morphological differences of three existing species of Songjian bass in China. 22 morphometric parameters were measured for each fish, morphometric parameters were calibrated using Burnaby’s multivariable method, and clustering and discriminant analysis were used to discriminate population differences. The results showed that: 1) The three geographical populations could be divided into two groups. The first group consisted of Qinglong River population and Fuchunjiang population and the second group included Yalujiang population. 2) According to the F-remove value, the largest five morphological parameters were selected: D (2-3), D (7-9), D (6-5), D (6-8) and D (2-1). The discriminant accuracy of the discriminant analysis with the selected five morphological parameters Up to 100%, indicating that the three geographical populations are morphologically discernable populations. Geographical isolation and environmental factors may be the main influencing factors for the morphological differences of Populus euchold population. Although morphometric measures are valid for discriminating the Songjak perch population, further validation studies of its population structure are necessary.