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Male rock sparrows differentially allocate nest defence but not food provisioning to offspring

Male rock sparrows differentially allocate nest defence but not food provisioning to offspring Male rock sparrows differentially allocate nest defence but not food provisioning to offspring Giuliano Matessi 1,3) , Cristina Carmagnani 2) , Matteo Griggio 2) & Andrea Pilastro 2) ( 1 Animal Behaviour Group, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø., Denmark; 2 Department of Biology, University of Padova, Padova, Italy) (Accepted: 13 June 2008) Summary Secondary sexual characters may provide information about individual quality to a partner, which may use it during parental care to strategically allocate resources to the current breed- ing attempt (Differential Allocation Hypothesis). Differential allocation by females has been demonstrated for a number of species, while male differential allocation based on female secondary sexual traits has received less attention. Yet females of many species, among birds in particular, are ornamented. We performed a test of male differential allocation based on a female ornament in the rock sparrow ( Petronia petronia ), a monomorphic species in which both sexes have a yellow breast patch, the size of which correlates with individual reproduc- tive quality. We reduced the breast patch in a sample of females and compared the parental care of their partners (chick feeding and nest defence) with the parental care http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Male rock sparrows differentially allocate nest defence but not food provisioning to offspring

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References (27)

Publisher
Brill
Copyright
© 2009 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853909X410748
Publisher site
See Article on Publisher Site

Abstract

Male rock sparrows differentially allocate nest defence but not food provisioning to offspring Giuliano Matessi 1,3) , Cristina Carmagnani 2) , Matteo Griggio 2) & Andrea Pilastro 2) ( 1 Animal Behaviour Group, Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen Ø., Denmark; 2 Department of Biology, University of Padova, Padova, Italy) (Accepted: 13 June 2008) Summary Secondary sexual characters may provide information about individual quality to a partner, which may use it during parental care to strategically allocate resources to the current breed- ing attempt (Differential Allocation Hypothesis). Differential allocation by females has been demonstrated for a number of species, while male differential allocation based on female secondary sexual traits has received less attention. Yet females of many species, among birds in particular, are ornamented. We performed a test of male differential allocation based on a female ornament in the rock sparrow ( Petronia petronia ), a monomorphic species in which both sexes have a yellow breast patch, the size of which correlates with individual reproduc- tive quality. We reduced the breast patch in a sample of females and compared the parental care of their partners (chick feeding and nest defence) with the parental care

Journal

Behaviour – Brill

Published: Jan 1, 2009

Keywords: MALE PARENTAL INVESTMENT; DIFFERENTIAL ALLOCATION HYPOTHESIS; NEST DEFENCE; FEMALE ORNAMENTS; PARENTAL CARE

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