Sex differences in parental care: Gametic investment, sexual selection, and social environment

Male and female parents often provide different type and amount of care to their offspring. Three major drivers have been proposed to explain parental sex roles: (1) differential gametic investment by males and females that precipitates into sex difference in care, (2) different intensity of sexual...

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Bibliographische Detailangaben
Veröffentlicht in:	Evolution. - Blackwell Publishing, Inc.. - 69(2015), 11, Seite 2862-2875
1. Verfasser:	Liker, András (VerfasserIn)
Weitere Verfasser:	Freckleton, Robert P., Remeš, Vladimir, Székely, Tamás
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2015
Zugriff auf das übergeordnete Werk:	Evolution
Schlagworte:	Behavioral sciences Social sciences Biological sciences Applied sciences


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100	1		\|a Liker, András \|e verfasserin \|4 aut
245	1	0	\|a Sex differences in parental care: Gametic investment, sexual selection, and social environment
264		1	\|c 2015
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520			\|a Male and female parents often provide different type and amount of care to their offspring. Three major drivers have been proposed to explain parental sex roles: (1) differential gametic investment by males and females that precipitates into sex difference in care, (2) different intensity of sexual selection acting on males and females, and (3) biased social environment that facilitates the more common sex to provide more care. Here, we provide the most comprehensive assessment of these hypotheses using detailed parental care data from 792 bird species covering 126 families. We found no evidence for the gametic investment hypothesis: neither gamete sizes nor gamete production by males relative to females was related to sex difference in parental care. However, sexual selection correlated with parental sex roles, because the male share in care relative to female decreased with both extra-pair paternity and frequency of male polygamy. Parental sex roles were also related to social environment, because male parental care increased with male-biased adult sex ratios (ASRs). Taken together, our results are consistent with recent theories suggesting that gametic investment is not tied to parental sex roles, and highlight the importance of both sexual selection and ASR in influencing parental sex roles.
540			\|a Copyrightc 2015 Society for the Study of Evolution
650		4	\|a Behavioral sciences \|x Ethology \|x Animal behavior \|x Animal social behavior \|x Mating behavior
650		4	\|a Social sciences \|x Gender studies \|x Gender identity \|x Gender roles
650		4	\|a Biological sciences \|x Biology \|x Evolutionary studies \|x Evolutionary biology \|x Evolution
650		4	\|a Applied sciences \|x Research methods \|x Modeling
650		4	\|a Biological sciences \|x Biology \|x Evolutionary studies \|x Evolutionary biology \|x Evolution \|x Natural selection \|x Sexual selection
650		4	\|a Biological sciences \|x Biology \|x Zoology \|x Animals \|x Birds
650		4	\|a Behavioral sciences \|x Ethology \|x Animal behavior \|x Animal social behavior \|x Animal parental behavior \|x Parental investment
650		4	\|a Social sciences \|x Gender studies \|x Gender bias
650		4	\|a Biological sciences \|x Biology \|x Developmental biology \|x Reproduction \|x Sex \|x Sex linked differences
650		4	\|a Biological sciences \|x Biology \|x Cytology \|x Cell biology \|x Cells \|x Germ cells \|x Gametes \|x Spermatozoa
655		4	\|a research-article
700	1		\|a Freckleton, Robert P. \|e verfasserin \|4 aut
700	1		\|a Remeš, Vladimir \|e verfasserin \|4 aut
700	1		\|a Székely, Tamás \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t Evolution \|d Blackwell Publishing, Inc. \|g 69(2015), 11, Seite 2862-2875 \|w (DE-627)32548645X \|w (DE-600)2036375-8 \|x 15585646 \|7 nnns
773	1	8	\|g volume:69 \|g year:2015 \|g number:11 \|g pages:2862-2875
856	4	0	\|u https://www.jstor.org/stable/24704887 \|3 Volltext
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951			\|a AR
952			\|d 69 \|j 2015 \|e 11 \|h 2862-2875