Superb fairy-wren males aggregate into hidden leks to solicit extragroup fertilizations before dawn
| Autor: | Anastasia H. Dalziell, Hanna Kokko, Andrew Cockburn, Nadeena Beck, Helen L. Osmond, Megan L. Head, Michael C. Double, Konstans Wells, Caroline Blackmore |
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| Rok vydání: | 2009 |
| Předmět: |
0106 biological sciences
biology Ecology 05 social sciences Zoology Territoriality biology.organism_classification 010603 evolutionary biology 01 natural sciences Mate choice Sexual selection Cooperative breeding Dawn chorus Seasonal breeder 0501 psychology and cognitive sciences Animal Science and Zoology Malurus Extra-pair copulation 050102 behavioral science & comparative psychology Ecology Evolution Behavior and Systematics |
| Popis: | Female superb fairy-wrens Malurus cyaneus initiate extragroup fertilizations by forays to the territory of preferred males, just before sunrise, 2--4 days before egg laying. Over a prolonged breeding season, males advertise their availability to foraying females by singing during the dawn chorus. Here, we show that 1) males commence dawn advertisement at the same time of the year regardless of their quality or status; 2) subordinate males advertise by singing in close proximity to the dominant, or by using the dominant's song perch, despite inevitable punishment; 3) low-quality dominants and their helpers sing from the boundary of their own territory, which increases their proximity to attractive neighboring dominants; 4) each spatial cluster of males use a common dialect of a song that is implicated in extragroup choice, despite the ability of individual males to sing several dialects; and 5) there is leakage of paternity to lower-quality helpers and neighbors as a result of their "satellite" behavior. Collectively, these data suggest that Wagner's hidden lek hypothesis (Wagner RA, 1998. Hidden leks: sexual selection and the clustering of avian territories. In: Parker PG, Burley NT, editors. Avian reproductive tactics: female and male perspectives. Ornithological Monographs No. 49. Allen Press. p. 123--145) can be extended to birds that defend year-round all-purpose territories and that mating induced by parasitic behavior of low-quality satellites can be one explanation for polyandry in birds. Copyright 2009, Oxford University Press. |
| Databáze: | OpenAIRE |
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