1. 1. Aomori Prefecture. 2017. The Management Plan for Japanese Monkeys in Shimokita Peninsula (in Japanese). https://www.pref.aomori.lg.jp/soshiki/kankyo/shizen/files/kouhyou_simokitaha_dainishu_keikaku.pdf [accessed on February 20, 2021].
2. 2. Azuma, S. 1985. Ecological biogeography of Japanese monkeys (Macaca fuscata) in the warm-and cold-temperate forest. pp. 1–5. In: Contemporary Mammalogy in China and Japan (Kawamichi, T. ed.), Mammalogical Society of Japan, Miyazaki.
3. 3. Azuma, S., Ashizawa, S., Mori, O. and Wada, K. 1978. Habitat degeneration and population trend in the subpopulation of Japanese monkeys in southwestern Shimokita. pp. 20–26. In: Report on National Monument: Monkeys of Shimokita Peninsula, Wakinosawa (in Japanese).
4. 4. Beehner, J. C., Onderdonk, D. A., Alberts, S. C. and Altmann, J. 2006. The ecology of conception and pregnancy failure in wild baboons. Behav. Ecol. 17: 741–750.
5. 5. Brown, J. L., Li, S. H. and Bhagabati, N. 1999. Long-term trend toward earlier breeding in an American bird: a response to global warming? Proc. Natl. Acad. Sci. USA 96: 5565–5569.