期刊
HORMONES AND BEHAVIOR
卷 64, 期 1, 页码 19-25出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.yhbeh.2013.04.008
关键词
Birds; Maternal effects; Manipulation; Sexual conflict; Hormones; Begging; Parental care
资金
- Spanish Ministerio de Ciencia e Innovacion [CGL2012-40229-C02-02]
- MICINN [BES-2007-16432]
- Marie Curie Intra European Fellowship [PIEF-GA-2011-301093]
- Isidro Parga Pondal fellowship
In species with biparental care, parents disagree evolutionarily over the amount of care that each of them is willing to provide to offspring. It has recently been hypothesised that females may try to manipulate their mates by modifying offspring begging behaviour through yolk hormone deposition, shifting the division of labour in their own favour. To test this hypothesis we first investigated how yellow-legged gull (Larus michaellis) parents feed offspring in relation to each component of complex begging behaviour and if feeding behaviour varies between sexes. Then we investigated the effect of yolk testosterone on chicks' begging by experimentally increasing yolk testosterone levels. Our results revealed that yolk testosterone has a component-specific effect on chicks' begging, specifically increasing the number of chatter calls. Parental feeding effort was influenced by the number of chatter calls emitted by chicks, but most importantly, the influence was stronger in male than in female parents. Moreover, chick body mass increased with the number of paternal feeds. In conclusion, these results show that female gulls may use yolk testosterone deposition to exploit their partners as predicted by the 'Manipulating Androgen Hypothesis (MAH)'. (C) 2013 Elsevier Inc. All rights reserved.
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