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Effect of extra-pair paternity and parental quality on brood sex ratio in the scarlet rosefinch Carpodacus erythrinus

SYSNO ASEP	0383938
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Effect of extra-pair paternity and parental quality on brood sex ratio in the scarlet rosefinch Carpodacus erythrinus
Author(s)	Poláková, Radka (UBO-W)_{RID, ORCID, SAI} Schnitzer, J. (CZ) Vinkler, Michal (UBO-W)_{RID, ORCID} Bryja, Josef (UBO-W)_{RID, SAI, ORCID} Munclinger, P. (CZ) Albrecht, Tomáš (UBO-W)_{RID, SAI, ORCID}
Number of authors	6
Source Title	Folia zoologica. - : Ústav biologie obratlovců AV ČR, v. v. i. - ISSN 0139-7893 Roč. 61, 3-4 (2012), s. 225-232
Number of pages	8 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	sex allocation ; extra-pair mating ; parental attractiveness
Subject RIV	EG - Zoology
R&D Projects	LC06073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA206/06/0851 GA ČR - Czech Science Foundation (CSF)
Institutional support	UBO-W - RVO:68081766
UT WOS	000313606500005
EID SCOPUS	84872433540
Annotation	The attractiveness hypothesis predicts that females should bias the sex ratio of their offspring towards sons when mated to attractive males. Females of many socially monogamous bird species commonly engage in extra-pair fertilizations (EPFs). Assuming that extra-pair males are more attractive to females than their social partners, and that sons inherit superior traits from their fathers, extra-pair young should be more likely males. According to the maternal condition hypothesis male-biased sex ratio in offspring should be also associated with better female body condition. We evaluated these ideas in the scarlet rosefinch (Carpodacus erythrinus), socially monogamous songbird with moderate level of extra-pair fertilizations. Contrary to the attractiveness hypothesis we have found no significant effect of paternity (within-pair or extra-pair) on the sex of individual offspring. Furthermore, data did not suggest that females mated to males with more elaborated plumage colour were more likely to produce sons. However, consistently with the maternal condition hypothesis, high-quality females produced more sons than daughters. Our results indicate that scarlet rosefinch females may not be able to manipulate the primary sex ratio of their offspring in relation to the attractiveness of their mate, but they may adjust it according to their own condition.
Workplace	Institute of Vertebrate Biology
Contact	Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524
Year of Publishing	2013

Number of the records: 1