| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| 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.
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