Growth and Development of Captive Anderson's Red-backed Voles from the Kii Peninsula

概要

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Postnatal growth and development of captive Anderson's red-backed voles (Eothenomys andersoni*) from the Kii Peninsula were investigated from birth to day 150. The body weight of both sexes increased rapidly until day 40, growth rate then slowed, and finally ceased by day 50. In males, however, a secondary increase in body weight occurred from day 70 until day 150. The head and body, and tail lengths of both sexes increased rapidly until day 30. Thereafter, the head and body length of females from day 60, and the tail length of both sexes from day 40, continued but slowly. Head and body length of males showed a secondary increase, though loose. Significant differences in body weight between males and females were recognized from day 30 to day 50, and again from day 90 ; in head and body length from day 30 ; in tail length from day 40, and in hind foot length from day 40, but not in ear length. The lower incisors erupted on day 3.6, the upper incisors on day 4.9, the dorsum of young was fully covered with hairs by day 7, the fore digits separated on day 7.9, the hind digits on day 9.1, the juvenile pelage was completed by day 12, the eyes opened on day 12.7, and weaning occurred on day 14. The growth and developmental patterns of voles from the Kii Peninsula were found to generally resemble those of Eothenomys smithii, essentially an intermediate form between Microtus and Clethrionomys.
日本哺乳類学会の論文
1995-06-01