鳴禽類における歌の複雑さの性淘汰と脳構造の変化
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- OKANOYA Kazuo
- Faculty of Letters, Chiba University PRESTO, Japan Science and Technology Corporation
書誌事項
- タイトル別名
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- Sexual Selection for Song Complexity and Modifications of Brain Structures in Songbirds.
抄録
The present review discusses whether sexual selection for complex songs modified brain structures in songbirds. If producing complex song is costly in males, song complexity should be correlated with some indexes of brain structures. At the same time, if selecting a potent mate based on song is costly in females, they also should develop some brain specializations correlated with the cognitive effort. Most existing studies focused on the volume of song control nuclei and song behavior. There are two main pathways for song control in the songbird brain: the posterior pathway that directly controls song production and the anterior pathway related with song perception. For the posterior pathway, between-species comparisons found positive correlations between the volume and behavior in males. However, most within-species comparisons failed to find such correlations. Several studies examined the relationship between song perception and the anterior pathway and lesion studies showed reduced selectivity for song in both males and females. Song selectivity and the volume of anterior pathway were positively correlated in females. Taken together, data are equivocal for the production part, but more consistent for the perception part. To study further the relationship between brain evolution and sexual selection in birdsong, methods for measuring song complexity need to be refined and other anatomical indexes besides volumetric methods should be examined.
収録刊行物
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- 日本鳥学会誌
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日本鳥学会誌 49 (2), 79-85, 2000
日本鳥学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390001204481661952
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- NII論文ID
- 130003564660
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- ISSN
- 18819710
- 0913400X
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可