银鼓鱼雌雄个体形态差异分析

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中图分类号：Q959.4 文献标志码：A 文章编号：1004—6755（2025）06—0042-06

Analysis of sexual dimorphism in the Selenotoca multifasciata

CHEN Pan1，2，3 ，HOU Xingrong1，2，3 ，MAO Haijun1，2.3 ，FU Qi1，2.3 ， LIN Chuan4，HUANG Hai1，2.3 （1.YazhouBay Innovation Research Instituteof Hainan TropicalOcean University，Sanya 572O22，China；2.Hainan Tropical Ocean University，KeyLaboratoryofUtilizationand ConservationforTropical MarineBioresourcesofMinistryofEducation， Sanya572022，China；3.HainanTropicalOceanUniversityHainanKeyLaboratoryforConservationandUtlizationofTropical MarineFisheryResources，Sanya 572o22，China；4.Lingshui DelinChengxin AquacultureCo.，LTD，Lingshui572423，China） Abstract：To investigate the morphological differences between male and female silver drumfish （Selenotoca multifasciata） and provide a scientific basis for their aquaculture management and breeding research，we analyzed 2O standardized morphological traits in 227 individuals. Using t一tests，we identified 15 significantly divergent traits，followed by principal component analysis （PCA），R一cluster analysis，and stepwise discriminant analysis to establish a sex一discrimination equation. The results showed that among the 2O standardized traits，14 exhibited highly significant differences （ P<0.01⟩ while 2 showed significant differences （ P<0. 05 ）. PCA revealed that the first four principal components accounted for 84.551% of the cumulative variance，with sex-related differences primarily concentrated in trunk，head，and body fullness indices.The discriminant function achieved an overall accuracy of 82.4% in sex identification. The study demonstrated that females tend to have a taller body and shorter，thicker caudal peduncles，whereas males exhibit a more slender body with longer，thinner caudal peduncles. These findings indicate significant morphological dimorphism between sexes in Selenotoca multifasciata ， supporting the feasibility of using morphological traits for sex discrimination.

Key words： Selenotoca multifasciata ; morphological differences； sex identification; principal component analysis；discriminant analysis（PCA）; R- cluster analysis

银鼓鱼又称多纹钱蝶鱼（Selenotocamulti-fasciata），隶属于辐鳍鱼纲（Actinopterygii），鲈形目（Perciformes），金钱鱼科（Scatophagidae），钱蝶鱼属（Selenotoca），是一种具有极高观赏价值和经济潜力的水产养殖品种。（剩余5995字）