Juvenile Molt in Peromyscus leucopus noveboracensis

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Abstract
A survey of the literature indicates that previous workers (Osgood, 1909; Nicholson, 1941; Hamilton, 1943; Cahalane, 1947; Burt, 1949) have been aware of the change from the gray juvenile pelage to the “rufous” or cinnamon red of the adult deer mouse, Peromyscus leucopus noveboracensis, but no investigation has been made of the progress of the pelage change or the factors that control it. Collins (1918), studied pelage change in Peromyscus maniculatus gambeli and several other closely related western forms. The present study was initiated with a two-fold purpose; (1) to follow the course of the pelage change; (2) to correlate age with pelage change. The data presented here are from observations made on deer mice captured in the Ithaca, New York, region during the summers of 1949 and 1950 and from animals of the same subspecies taken in...

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