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- Title
Does male extra-territory foray effort affect fertilization success in hooded warblers Wilsonia citrina?
- Authors
Stutchbury, Bridget J. M.; Pitcher, Trevor E.; Norris, D. Ryan; Tuttle, Elaina M.; Gonser, Rusty A.
- Abstract
Hooded warbler Wilsonia citrina males vary greatly in the frequency and duration of their off-territory forays in search of extra-pair copulations. We used radiotracking and microsatellite parentage analysis in high and low density populations to determine if (1) high foray rate or time off-territory reduces within-pair fertilization success, and (2) if a high foray rate onto the territory of a fertile female increases the likelihood of obtaining EPFs with that female. Males who left their territory often, or for longer periods, did not have lower within-pair fertilization success. Some males repeatedly visited a neighboring fertile female, but in only 3 of 19 cases where radiotagged males visited a fertile female did the male actually sire offspring with that female. Male foray rate onto a fertile female's territory was not a good predictor of whether or not he sired extra-pair offspring with that female. We suggest that mate choice and extra-pair behavior by females may explain why male foray behavior does not correspond closely with actual fertilization success.
- Subjects
HOODED warbler; REPRODUCTION; SPATIAL behavior in animals; ANIMAL courtship; ANIMAL sexual behavior; WILSONIA; ANIMAL behavior
- Publication
Journal of Avian Biology, 2005, Vol 36, Issue 6, p471
- ISSN
0908-8857
- Publication type
Article
- DOI
10.1111/j.0908-8857.2005.03513.x