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Superb fairy-wren males aggregate into hidden leks to solicit extragroup fertilizations before dawn

Date

2009

Authors

Cockburn, Andrew
Dalziell, Anastasia
Blackmore, Caroline
Double, Michael
Kokko, Hanna
Osmond, Helen
Beck, Nadeena
Head, Megan
Wells, Konstans

Journal Title

Journal ISSN

Volume Title

Publisher

Oxford University Press

Abstract

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.

Description

Keywords

Keywords: aggregation behavior; breeding season; cooperative breeding; extra-pair copulation; lek; mate choice; perching behavior; polyandry; preference behavior; reproductive strategy; sexual selection; songbird; territoriality; Aves; Malurus; Malurus cyaneus; Tro Cooperative breeding; Dawn chorus; Extrapair copulation; Hidden lek; Malurus; Polyandry; Song dialect

Citation

Source

Behavioral Ecology

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1093/beheco/arp024

Restricted until

2037-12-31