銀鼓魚雌雄個體形態(tài)差異分析

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中圖分類號：Q959.4 文獻標志碼：A 文章編號：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 ，F(xiàn)U 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

銀鼓魚又稱多紋錢蝶魚（Selenotocamulti-fasciata），隸屬于輻鰭魚綱（Actinopterygii），鱸形目（Perciformes），金錢魚科（Scatophagidae），錢蝶魚屬（Selenotoca），是一種具有極高觀賞價值和經(jīng)濟潛力的水產(chǎn)養(yǎng)殖品種。（剩余5995字）