Nestling testosterone is associated with begging behaviour and fledging success in the pied flycatcher, Ficedula hypoleuca

Goodship, Nicola M. and Buchanan, Katherine L. 2006, Nestling testosterone is associated with begging behaviour and fledging success in the pied flycatcher, Ficedula hypoleuca, Proceedings of the royal society : B supplement, vol. 273, no. 1582, pp. 71-76.


Title Nestling testosterone is associated with begging behaviour and fledging success in the pied flycatcher, Ficedula hypoleuca
Formatted title Nestling testosterone is associated with begging behaviour and fledging success in the pied flycatcher, Ficedula hypoleuca
Author(s) Goodship, Nicola M.
Buchanan, Katherine L.
Journal name Proceedings of the royal society : B supplement
Volume number 273
Issue number 1582
Start page 71
End page 76
Publisher The Royal Society Publishing
Place of publication London, England
Publication date 2006-01-07
ISSN 0962-8452
1420-9101
Keyword(s) offspring solicitation
begging behaviour
testosterone
signalling
Summary Animal signals are hypothesized to be costly in order to honestly reflect individual quality. Offspring solicitation signals given by nestling birds are thought to have evolved to advertise either need or individual quality. We tested the potential role of testosterone (T) in controlling the intensity of these signals by measuring begging behaviour as: (i) duration of the begging display and (ii) maximum height of the begging stretch, and by sampling endogenous T levels in nestling blood. We tested nestling pied flycatchers (Ficedula hypoleuca) using well-established experimental paradigm involving transient food deprivation to encourage begging behaviour and then blood-sampled nestlings at the end of these tests for T levels. Our results show that individual nestlings with the most intense begging displays had the highest circulating levels of T immediately after testing. In addition, we found substantial differences between broods in terms of circulating T. Finally, we found evidence that broods with higher levels of T showed increased fledging success, indicating a benefit for increased T production in nestlings. The potential trade-offs involved in T-mediated begging behaviour are discussed.
Language eng
Field of Research 060399 Evolutionary Biology not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30020134

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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