Long-term variation in fruiting and the food habits of wild Japanese nacaques on Kinkazan Island, northern Japan

Yamato Tsuji · Shiho Fujita · Hideki Sugiura · Chiemi Saito · Seiki Takatsuki

61 citations0/0 files storedAmerican Journal of Primatology

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Primate Behavior and Ecology Wildlife Ecology and Conservation Animal Ecology and Behavior Studies

Abstract

We studied the relationship between the food habits of Japanese macaques (Macaca fuscata) and the availability of nuts (Fagus crenata, Zelkova serrata, Carpinus spp., and Torreya nucifera) on Kinkazan Island, northern Japan, from 1997 to 2005 to examine the long-term variations in both food habits and availability. The food habits of the monkeys showed clear seasonal changes: the staple foods were woody leaves and flowers in spring (May and June), woody leaves and seeds or fruits other than nuts in summer (July and August), nuts and seeds or fruits other than nuts in fall (September-November), and herbaceous plants in winter (December-April). The availability of nuts, combinations of masting species, and energy production varied among years. Food habits varied among years, but the magnitude of variability of food habits differed among seasons, with large variability during summer and winter, and small variability in spring. Food availability was poor in summer and winter, but in several years the monkeys were able to consume nuts during those seasons. We emphasize the importance of conducting long-term studies on both food availability and the food habits of animals in the temperate zone.

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References

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