| 大口黑鲈两个地理群体形态差异及其对体质量的影响 |
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| 引用本文： | 李江涛,邱小龙,方俊超,黄菲菲,邱晓桐,吕晓静,杨凯宇,林蠡.大口黑鲈两个地理群体形态差异及其对体质量的影响[J].仲恺农业工程学院学报,2021,34(3):40-47. |
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| 作者姓名： | 李江涛 邱小龙 方俊超 黄菲菲 邱晓桐 吕晓静 杨凯宇 林蠡 |
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| 摘 要： | 随机选取广东和台湾两个不同地理群体大口黑鲈（Micropterus salmoides），采用多元分析方法分析了两地理群体间形态性状差异及其对体质量的影响.结果表明，广东和台湾两地理群体间的大口黑鲈形态差异主要集中于躯干中部和尾部.前3个主成分累积贡献率达到95.8%.前2主成分因子得分散点图中两地理群体重叠区域较小，可以完全区分.广东群体和台湾群体的形态性状对体质量具有相似的影响效果，其中体高、胸鳍基点至背鳍基点长度、臀鳍基点至背鳍基点长度、臀鳍基点至背鳍末端长度和背鳍末端至尾鳍基点长度对体质量的直接作用达到了显著水平，是影响两地理群体大口黑鲈体质量的关键形态指标.研究结果可为大口黑鲈体质量选种提供基础资料.
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| 收稿时间： | 2021-11-02 |
Morphological differences between two geographical populations and their
effects on body weight in largemouth bass Micropterus salmoides |
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| Abstract: | Two different geographical populations of largemouth bass Micropterus salmoides from Guangdong and Taiwan were randomly selected. The differences in morphological traits and their effects on body weights between the two populations were analyzed by multivariate analysis. Results showed that the significant differences were observed in the middle and back sections of fish body. The contribution rates of the first three principal components were 95.8%. In the scatter plot of the scores of the first two principal components, the two populations could be completely distinguished due to the low overlap area. The morphological traits of Guangdong population and Taiwan population had similar effects on the body weights. The significantly direct effects were found in body height, length from origin of pectoral to dorsal fin, length from origin of anal to dorsal fin, length from origin of anal fin to terminus of dorsal fin, and length from terminus of dorsal fin to origin of tail fin, which were the crucial factors affecting the body weights of the two geographical populations of Micropterus salmoides. A theoretical basis for body weight selection of Micropterus salmoides was provided. |
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