第6回極域科学シンポジウム[OB] 極域生物圏11月16日（月）　統計数理研究所 セミナー室1（D305

Watanabe Yuuki

渡辺 佑基

National Institute of Polar Research Repository

  鳥の渡りの距離を決める要因は何か？  渡辺佑基 1 1極地研  Migration ranges in birds: effects of body size, phylogeny, and flight type  Yuuki Watanabe1 1NIPR  Many species of birds migrate annually between breeding and non-breeding areas, which are hundreds or thousands kilometers away.  What factors affect migration distance of each species?  In theory, migration distance is expected to be independent of body size, but this prediction has never been tested.  In this study, I compiled the data of annual migration range, recorded by satellite tracking or light-level based geolocation, for 133 bird species, ranging in body mass from 12 g (warbler) to 8775 g (wandering albatross).  Using phylogenetically informed statistics, I show that migration range significantly decreases with body size.  The discrepancy with theory suggests that some assumptions of the theory are invalid.  In addition, I show that dynamic soarers (e.g., shearwaters and albatrosses) have larger migration range for their body size, whereas thermal soarers (e.g., raptors and storks) do not have elevated migration ranges despite of their cost-efficient flight style.  

Migration ranges in birds: effects of body size, phylogeny, and flight type

渡辺, 佑基

Watanabe, Yuuki

Institutional Repositories DataBase (IRDB)

https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=11984&item_no=1&attribute_id=16&file_no=1

Migration ranges in birds: effects of body size, phylogeny, and flight type

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