【摘要】 皱纹盘鲍是我国重要的渔业资源,其地理群体也是我国重要的鲍种质资源来源。不同地理群体间形态及相对生长的差异对皱纹盘鲍资源管理和种质资源鉴定等提供重要参考。以我国自然海区采集的7个皱纹盘鲍群体作为研究材料,通过测定9个形态测量指标并定义了这些测量指标间的17个比率变量,分析了群体内和群体间贝壳形态和体重相对生长的变异。除个别变量外,协方差分析揭示形态比率变量在群体间存在显著变异;异速生长研究揭示了壳形态特征与皱纹盘鲍群体中异速生长差异之间的高度线性相关性,异速生长程度呈现一定的群体区别。非度量多维尺度分析(NMDS)和马氏距离聚类分析(CLUSTER)将皱纹盘鲍群体分为2个组,线性判别分析(LDA)与NMDS和CLUSTER结果相符,然而LDA未能较好的将各种群样本分类。研究结果初步表明皱纹盘鲍表现出与我国沿海环境和/或生态条件差异相关的表型可塑性,然而这种表型差异也可能受到人工底播苗种的遗传影响。研究结果将对于皱纹盘鲍渔业资源管理如管理单位的界定,以及为今后全面评价皱纹盘鲍不同地理群体的遗传变异等提供参考。更多还原

【Abstract】 Pacific abalone(Haliotis discus hannai Ino) is an important fishery resource in China, and its geographical populations are an important source of abalone germplasm. Shell morphology and relative growth variability among different geographical populations provide important references for fishery management and identification of genetic resources of the species. Seven abalone populations were sampled along the coast of China for research materials. By measuring 9 morphometric characters and defining 17 ratio variables of the abalone samples, the relative growth patterns of shell morphology and body weight variations within and between populations were presented. Except for one ratio variable, analysis of covariance revealed significant variations in morphological and weight ratio variables among populations. Allometric growth studies revealed a highly linear correlation between shell morphological and body weight characters and allometric growth patterns among populations. The populations of Pacific abalone were classified into two groups in China by non-metric multidimensional scaling analysis(NMDS), and Mahalanobis distance clustering analysis(CLUSTER), as consistent as linear discriminant analysis(LDA) in overall. This study preliminarily revealed that the Pacific abalone in China exhibits phenotypic plasticity due to differences in coastal environments and/or ecological conditions, but might also be genetically influenced by seed release in history, and provided a reference for the fishery management of the species to better evaluate the genetic variations in different geographical populations of the species in China in the future.更多还原