Journal of the Mammalogical Society of Japan
Print ISSN : 0914-1855
ISSN-L : 0914-1855
Original papers
Reproductive Activity of the Japanese Long-tailed Field Mouse Apodemus argenteus under Laboratory Conditions
Sachiko KOYAMA
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JOURNAL FREE ACCESS

1995 Volume 20 Issue 2 Pages 117-124

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Abstract

The reproductive activity of captive Apodemus argenteus was observed in detail from 1986 to 1989, and 149 births were recorded. Parturition occurred throughout the year, but peaked from March to July. Reproductive activity of the live-trapped generation did not differ from that of the second, third or fourth generations. Litter size was 4.21 on average, and the earliest age at first parturition was three months. The time interval between successive births was 33.6 days on average, the shortest being 20 days. Sexual behavior was also observed, and a necessity for experience was indicated.

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© 1995 The Mammalogical Society of Japan
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