| Project/Area Number |
26440233
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Research Collaborator |
FASOLA Mauro Pavia大学, Zoology, 教授
MASHIKO Miyuki 野生動物保護管理事務所, 計画策定支援室, 研究員
CARRASCO Luis Centre for Ecology and Hydrology, Research Associate
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | Collective site fidelity / Random forest / Habitat selection / Long term data / Ardea cinerea / Bayesian / Evidentialist / Fisherian / site fidelity / collective philopatry / random forest / land use map / random walk / correlated random walk / habitat selection / long term data / Area cinerea / Fisheian |
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| Outline of Final Research Achievements |
We analyzed heronry dynamics around Ibaraki prefecture with random forest and correlated random walk. Increasing site fidelity was detected as a collective decision of colony members, and such decision was highly correlated with changes in species composition. We used the same technique for Dr. Fasola's data in northern Italy and found a similar tendency of increasing site fidelity. Our findings warn a previous interpretation that colony distributions were mainly determined by distributions of available foraging sites. More attention should be paid for historicity of colony formation.
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