| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Western low land of Yakushima Island, which have been designated as World Natural Heritage, is generally thought as a virgin forest. Actually, however, the area have been used for logging about 40-100 years ago and was changed into secondary forest. The central part of this area have been logged almost completely, and number of monkeys increased there recently. Some groups of monkeys shifted their home range from the central part to northern part and the number of monkeys decreased there. These results suggest that monkeys increased in the central part and some of them moved to peripheral part with a lower population density, and decreased the population there. Past artificial, heterogeneous alternation of vegetation may make preferable and preferable habitat and make the monkey population unstable.
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