Response of territorial male song sparrows to song types and variations
β Scribed by Philip K. Stoddard; Michael D. Beecher; Mary S. Willis
- Publisher
- Springer
- Year
- 1988
- Tongue
- English
- Weight
- 677 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0340-5443
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In many songbird species, males sing a repertoire of distinct song types. Song sparrows typically are described as having repertoires of about a dozen song types, but these song types are themselves quite variable and some songs are produced that appear intermediate between two types. In this study
Previous investigations have shown that malemale interactions over territory boundaries result in an increase in plasma levels of testosterone (T). In order to determine the time course of this increase following an agonistic challenge, male song sparrows, Zonotrichia (= Melospiza) melodia, were exp