TitleINTERFERENCE ASYMMETRIES AMONG AGE-SEX CLASSES OF RUFOUS HUMMINGBIRDS DURING MIGRATORY STOPOVERS
Publication TypeJournal Article
Year of Publication1993
AuthorsCarpenter, FL, Hixon, MA, Russell, RW, Paton, DC, Temeles, EJ
JournalBehavioral Ecology and Sociobiology
Volume33
Pagination297-304
Type of ArticleJournal Article
ISSN0340-5443
Abstract

Three age-sex classes of rufous hummingbirds (Selasphorus rufus) overlap temporally and defend feeding territories during migratory stopovers in the Sierra Nevada of California. We demonstrate that these classes differ in their ability to secure and maintain high-quality feeding territories for refueling, and that these differences result in differences in resource use. Data on acquisition of territories, territory characteristics, and responses of territory owners to intruders suggest that several mechanisms are involved in determining dominance, involving sex- and age-related differences in wing disc loading, coloration, and experience. We discuss the implications of these results for understanding intraspecific variation in migration strategies.

URL<Go to ISI>://WOS:A1993MK03500002