| Budget Amount *help |
¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Estrildid finches are known for great interspecific diversity in the degree of elaboration in courtship dance, song and plumage coloration and also for the considerable sex differences in these traits within species. The present series of studies examined the function and evolution of such diverse sexual signals. Ethological studies revealed that song and dance have different functions even when they are expressed simultaneously. Song serves as a condition dependent signal giving a clue for mate choice, while dance plays an important role in pair bonding. Phylogenetic comparative studies also showed that song and dance evolved independently. However, plumage pattern conspicuousness and courtship dance complexity are correlated among species, meaning that static and dynamic aspects of visual sexual signals are interlinked with each other.
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