Sexual dimorphism of Apodemus speciosus in wild populations

摘要: Sexual size dimorphism was found in many Apodemus species, and males were dominant cases (review, Montgomery 1989). However, it not wild populations of A. speciosus (Imaizumi 1962; Miyao Mori 1967). Imaizumi (1962) did find any sexual difference external morphology (head body length, ear hind foot length) the Izu, Miura, Izuoshima populations. determined age class each sample by checking molar wear, showed that females belonging to same different these traits. Oh (1998) growth weight under captivity. There no at birth for all characters, but significant differences nearly 40 days weight, head tail length. Thus, there is inconsistency between captive speciosus. It therefore, necessary clarify