Dissertation Research: Sexual Dimorphism in the Catarrhine Teeth

这项研究的主要目的是了解卡他性灵长类动物犬齿的性别二型性的原因。这一目标将通过收集大量灵长类动物的牙齿尺寸来实现。将获得每个物种的大量雄性和雌性样本，以便彻底记录性别二型性的变异，从而能够在类人型灵长类动物的所有分类水平上比较性别二型性。将仔细研究身体大小、身体大小二型性和系统发育对性二型性表达的影响。科学家们对犬齿减少的原因以及与此相关的人类血统犬齿的性别二型性存在分歧。这项研究将检验几个假说，比如性二态模式是否源于雄性和雌性灵长类动物之间的不平等分工，或者喂食小物体是否导致犬类减少与切牙减少相关，以允许更有效的下巴运动。

The primary objective of this research is to understand the reasons for sexual dimorphism of canine teeth in the catarrhine primates. The goal will be approached by collecting tooth size measurements for a large body of primates. Large samples of males and females for each species will be obtained to allow a thorough documentation of variation of sexual dimorphism, allowing comparisons of sexual dimorphism at all taxonomic levels within the anthropoid primates. The effects of body size, body size dimorphism and phylogeny on the expression of sexual dimorphism will be carefully studied. Scientists disagree as to the cause of canine reduction and the associated reduction sexual dimorphism in the canine teeth of the human lineage. This research will test several hypotheses, such as whether patterns of sexual dimorphism result from unequal division of labor between male and female primate, or whether small object feeding has caused canine reduction in association with incisal reduction to allow more efficient jaw movements.