- 著者
- Seiki TAKATSUKI Shingo MIURA Kazuo SUZUKI Kaori ITO-SAKAMOTO
- 出版者
- The Mammal Society of Japan
- 雑誌
- Journal of the Mammalogical Society of Japan (ISSN:09141855)
- 巻号頁・発行日
- vol.15, no.2, pp.91-98, 1991 (Released:2010-08-25)
- 参考文献数
- 21
- 被引用文献数
- 1
A mass mortality of sika deer (Cervus nippon) population occurred on Kinkazan Island in northern Japan in the spring of 1984, which followed an unusual cold winter. We collected a sample of 240 deer skulls. All deer were aged and sexed except some fawns. The sex ratio of >1 year old deer was 50: 50, but was skewed toward males compared with the sex ratio obtained in the population census in 1983. The oldest age at death was 12.5 years for males and 15.5 years for females. The frequency was low for young age classes. A relative cumulative frequency curve was constructed to examine the age-specific mortality pattern. The curves of both sexes suggested that mortality was relatively high for fawns and low for adult and prime-aged animals, and that mortality was higher and life span was shorter for males than for females.
- 著者
- [edited by] Dale R. McCullough Seiki Takatsuki Koichi Kaji
- 出版者
- Springer
- 巻号頁・発行日
- 2009
- 著者
- Mizuho Hirasawa Eiji Kanda Seiki Takatsuki
- 出版者
- THE MAMMAL SOCIETY OF JAPAN
- 雑誌
- Mammal Study (ISSN:13434152)
- 巻号頁・発行日
- vol.31, no.1, pp.9-14, 2006 (Released:2006-07-08)
- 参考文献数
- 19
- 被引用文献数
- 44
Food habits of the raccoon dog (Nyctereutes orocyonoides) at a western suburb of Tokyo were analyzed by the point-frame method by use of 344 fecal samples for a year. The food habits were omnivorous, but plants, particularly plant leaves and seeds, were predominant. The seasonal foods were characterized by leaves and flowers in spring, insects in summer, seeds in autumn, and birds/mammals and artificial foods in winter. Dependency on artificial foods was not strong. The raccoon dogs fed on various fruits and nuts, among which those of planted fruit trees like ginkgo and persimmon were particularly important. The raccoon dog seems to have adapted themselves to "satoyama", a traditional Japanese landscape.