四川农业大学学报2025，Vol.43Issue(1)：16-24,47,10.DOI:10.16036/j.issn.1000-2650.202409494
雅砻江软刺裸裂尻鱼不同地理群体形态差异研究
Morphological Variations and Differentiation of Schizopygopsis malacanthus from Different Population in the Yalong River
摘要
Abstract
[Objective]This study aims to explore the morphological differences of different geographical species groups of Schizopygopsis malacanthus.[Method]The countable and quantifiable characters of 92 S.malacanthus specimens collected from four reaches of the Yalong River were analyzed,and the morpho-logical differences were compared by multivariate morphometry.[Result]The number of gill rakes on the inner side of the first gill arch in the Yajiang population was significantly lower than the other three populations in countable traits.The number of different traits among Yajiang,Ganzi,and Luhuo popula-tions was the highest(12),mainly reflected in the significant differences of D3,D7,D22,D28,D36,and other vertical axial traits.In contrast,the number of different traits among Dege and Ganzi popula-tions was the least(6),mainly reflected in the significant differences of D1,D4,D9,D10,and other horizontal axial traits.There were significant differences in different numbers among the four popula-tions,but the specific traits with significant differences varied,and the difference coefficient of the four geographic populations did not reach the subspecies differentiation level.The principal component analy-sis extracted 11 principal components,with a contribution rate of 79.059%.The contribution index mainly reflected in the head and trunk.Cluster analysis showed that the Dege,Ganzi,and Luhuo popula-tions first clustered into one group,and then with Yajiang population.Five variables were selected from four geographical groups to establish the discriminant formula,and the discriminant accuracy reached 80.4%.[Conclusion]Although there is morphological differentiation among the four geographic groups of S.malacanthus in the Yalong River,the level of subspecies differentiation has not yet been reached during the long evolutionary process.关键词
软刺裸裂尻鱼/形态度量学/主成分分析/聚类分析/判别分析Key words
Schizopygopsis malacanthus/morphometrics/principal component analysis(PCA)/cluster analysis/discriminant analysis分类
农业科技引用本文复制引用
严太明,何智,蒲勇,胡佳祥,高阔,熊金鑫,赖柏霖,田琴瑶,徐帅,唐子婷..雅砻江软刺裸裂尻鱼不同地理群体形态差异研究[J].四川农业大学学报,2025,43(1):16-24,47,10.基金项目
国家自然科学基金(31972777、31402286) （31972777、31402286）
生态环境部生物多样性调查评估项目(2019HJ2096001006). （2019HJ2096001006）
