2015 Fiscal Year Final Research Report
Geographic variation in bird songs: effects of character displacement on reproductive isolation
Project/Area Number |
24570119
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Biodiversity/Systematics
|
Research Institution | National Museum of Nature and Science, Tokyo |
Principal Investigator |
HAMAO Shoji 独立行政法人国立科学博物館, 動物研究部, グループ長 (60360707)
|
Project Period (FY) |
2012-04-01 – 2016-03-31
|
Keywords | さえずり / 種認知 / 生殖隔離 / 形質置換 |
Outline of Final Research Achievements |
I studied evolution of bird songs and mechanism of species recognition using two species of songbirds, Japanese and varied tits, which are allopatrically and sympatrically distributed in the Ryukyu Archipelago. Both species showed geographic variation in songs. Japanese tits coexisting with varied tits sang low-frequency songs that were diverged from varied tit songs (i.e., characer displacement). Playback experiments showed that birds with a related species discriminate not only heterospecific songs but also concpecific nonlocal dialects from their own dialects. Thus, coexsistence of a related species with similar songs affects song structure and species recognition of birds.
|
Free Research Field |
行動生態学
|