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短尾猴下颌骨的性二型

王红,潘汝亮,彭燕章,叶智彰   

  1. 中国科学院昆明动物研究所,昆明
  • 出版日期:2006-07-28 发布日期:2007-07-20

STUDIES 0N SEXUAL DIM0RPHISM 0F THE MANSIBULAR DIMENSIONS IN STUMPTAILES MONKEY (Macaca arctoides)

WANG Hong,PAN Ruliang, PENG Yanzhang, YE Zhizhang   

  • Online:2006-07-28 Published:2007-07-20

摘要: 对30个成年短尾猴下颌骨的8个有关变量作了性二型研究。单因子分折说明, 8个变量均达到了显著差异水平。 判别分析得到的第一判别式为:D=-11.013+1.151下颌骨髁长+0.269下颌骨髁宽。当D=-1.271±0.182时,标本为雌性,当D=0.973±0.290时为雄性。雄性下颌骨髁比雌性更长和更宽,且变化较为稳定,可作为种内性别问的鉴别特征。雄性比雌性具有较大咀嚼阻力臂(下颌长),但其他阻力臂则比雌性相对较短。与一些灵长类相同变量的比较说明,短尾猴下颃骨结构与猕猴较为接近,与长尾叶猴相差甚远。这可反映它们食性和行为方面的亲疏关系。

关键词: 短尾猴, 性二型, 下颔骨, 异速生长

Abstract: Eight variables of mandibular dimensions measured from the stump-tailed monkey were studied by univariate and multivariate analyses in order to estimate sexual dimorphism in this creature.ANOVA test showed that all of the variables are significant differences between sexes. The significant and very useful discriminators are condyle structare,i.e.width and lenght of the condyle.Two sexes are successful separated,the first diseriminat function based on condylar length and width(P<0.001). The function is D=-11.013+1.151 Condyle +0.269 Condylm, When D=-1.271+0.182, individual will be discriminated as the female; when D=0.973+0.290, they as the male. If male has a longer mandibular length or resistance arn than female, another resistance arms are relatively shorted, But condylar strutcureis more developed than that of the female in order to obtain the more powerful masticatory froce. Relationship between mandibular length and other variables in stump-tailed monkey is more closer to that in rhesus monkey and in proboscis monkey, but a little far from that in the entellus monkey. This may be correlated with similar dietary category and between stump-taied and rhesus monkeys.

Key words: Maeaea aretoideas, exual dimorphism, Mandibula, Allometry