祁连山裸鲤(Gymnocypris chilianensis)雌雄群体的形态差异分析

赵仲孟, 黄志鹏, 赵瀚, 张露, 段元亮, 牟成艳, 周剑, 李强

中国农学通报. 2023, 39(5): 142-147

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中国农学通报 ›› 2023, Vol. 39 ›› Issue (5) : 142-147. DOI: 10.11924/j.issn.1000-6850.casb2022-0084
水产·渔业

祁连山裸鲤(Gymnocypris chilianensis)雌雄群体的形态差异分析

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Morphological Differences Between Male and Female Populations of Gymnocypris chilianensis

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摘要

为快速准确鉴定野生祁连山裸鲤性别,分析了甘肃疏勒河流域的100尾祁连山裸鲤(Gymnocypris chilianensis)的形态学性状,建立了雌雄个体的判别模型。本研究采用单因素方差分析、主成分分析和聚类分析。单因素方差分析显示体高、体厚、背吻距、背鳍基长、头厚、眼后头长、眼径、口裂宽8个标准化性状和体长体重在两性群体间均存在着显著差异(P<0.05),主成分分析和R-聚类分析均显示雌雄个体差异主要集中在体形大小方面。通过逐步判别法筛选出15个性状构建的判别方程对两性群体识别的正确率达到92%。分析结果可知,祁连山裸鲤雌性个体比雄性个体体型大,体高、体厚均大于雄性,但口裂和眼径小、背鳍短。该研究结果可解决祁连山裸鲤性别鉴定问题,为其繁育和养殖过程提供基础资料。

Abstract

To identify the sex of Gymnocypris chilianensis quickly and exactly, this paper studied morphological information of 100 Gymnocypris chilianensis samples collected from Sulehe River in Gansu Province and established a discrimination model of male and female individuals. One-way analysis of variance (ANOVA), principal component analysis and R-cluster analysis were adopted. ANOVA revealed that there were significant differences in eight standardized characteristics (body height, body thickness, dorsal kiss distance, dorsal fin base length, head thickness, posterior head length, eye diameter, mouth fissure width) and body length and weight between male and female populations (P<0.05). Based on the analysis of the morphological index system by principal component analysis and R-cluster analysis, G. chilianensis was classified by body size. On the basis of the analysis, 15 characteristics were screened and the discriminate equations were built for classification of the 100 samples with an accuracy rate of 92%. Therefore, it is concluded that the female G. chilianensis collected from Sulehe River are superior to males in body height and body thickness, but have smaller interorbital diameter, oral fissure length and dorsal fin length. The findings can be used in sex identification of G. chilianensis and provide basic information for its reproduction.

关键词

祁连山裸鲤 / 性别 / 形态差异 / 判别分析

Key words

Gymnocypris chilianensis / sex / morphological differences / discriminant analysis

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赵仲孟 , 黄志鹏 , 赵瀚 , 张露 , 段元亮 , 牟成艳 , 周剑 , 李强. 祁连山裸鲤(Gymnocypris chilianensis)雌雄群体的形态差异分析. 中国农学通报. 2023, 39(5): 142-147 https://doi.org/10.11924/j.issn.1000-6850.casb2022-0084
ZHAO Zhongmeng , HUANG Zhipeng , ZHAO Han , ZHANG Lu , DUAN Yuanliang , MU Chengyan , ZHOU Jian , LI Qiang. Morphological Differences Between Male and Female Populations of Gymnocypris chilianensis. Chinese Agricultural Science Bulletin. 2023, 39(5): 142-147 https://doi.org/10.11924/j.issn.1000-6850.casb2022-0084

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基金

农业财政专项“西北地区重点水域渔业资源与环境调查”
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