Endo H, Kurohmaru M, Hayashi Y
Department of Zoology, National Science Museum, Tokyo, Japan.
J Vet Med Sci. 1994 Oct;56(5):855-60. doi: 10.1292/jvms.56.855.
We measured crania and mandibles of Ryuku wild pigs from Iriomote Island. Sex and age were determined by observation of lower teeth. From the present data, the growth pattern was established for some items. For several parts of the cranium and mandible, the relative growth coefficient was compared. The results obtained here are summarized as follows: (1) Although sexual dimorphism was already shown in the younger group, a significant difference in profile length and length from the angle was not seen in the adult group. (2) As the animal grew, the proportion of length to width became larger in the skull. (3) The visceral cranium grew more rapidly in length than the cerebral cranium. On the other hand, growth of the cerebral cranium contributed to width in cranial development. (4) The body of the mandible was shown to grow more rapidly in length than the ramus of the mandible. (5) The growth pattern of some items was related to that of their associated muscles. These basic data are expected to be compared with data from other population of the same subspecies and Japanese wild pig. The comparisons will contribute to the establishment of origin and phylogeny of this animal.
我们测量了来自西表岛的琉球野猪的颅骨和下颌骨。通过观察下齿来确定性别和年龄。根据现有数据，确定了一些项目的生长模式。对颅骨和下颌骨的几个部分的相对生长系数进行了比较。此处获得的结果总结如下：(1) 尽管在较年轻的群体中已经表现出性别二态性，但在成年群体中，侧面长度和从角度处的长度没有显著差异。(2) 随着动物的生长，头骨的长度与宽度之比变得更大。(3) 面颅骨在长度上的生长比脑颅骨更快。另一方面，脑颅骨的生长对头骨发育的宽度有贡献。(4) 下颌体在长度上的生长比下颌支更快。(5) 一些项目的生长模式与其相关肌肉的生长模式有关。这些基础数据有望与同一亚种的其他种群以及日本野猪的数据进行比较。这些比较将有助于确定这种动物的起源和系统发育。
