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001-es BibID:	BIBFORM018780
Első szerző:	Harrison, Freya
Cím:	How is sexual conflict over parental care resolved? : a meta-analysis / F. Harrison, Zoltán Barta, I. Cuthill, Tamás Székely
Dátum:	2009
ISSN:	1010-061X
Megjegyzések:	Biparental care of offspring is both a form of cooperation and a source of conflict. Parents face a trade-off between current and future reproduction: caring less for the current brood allows individuals to maintain energy reserves and increase their chances of remating. How can selection maintain biparental care, given this temptation to defect? The answer lies in how parents respond to changes in each other's effort. Game-theoretical models predict that biparental care is evolutionarily stable when reduced care by one parent leads its partner to increase care, but not so much that it completely compensates for the lost input. Experiments designed to reveal responses to reduced partner effort have mainly focused on birds. We present a meta-analysis of 54 such studies, and conclude that the mean response was indeed partial compensation. Males and females responded differently and this was in part mediated by the type of manipulation used.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban biparental care compensation cooperation handicapping meta-analysis parental care partner removal sexual conflict
Megjelenés:	Journal Of Evolutionary Biology. - 22 : 9 (2009), p. 1800-1812. -
További szerzők:	Barta Zoltán (1967-) (biológus, zoológus) Cuthill, I. Székely Tamás (1959-) (biológus)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM030380
Első szerző:	Kosztolányi András (biológus)
Cím:	Persistence of an extreme male-biased adult sex ratio in a natural population of polyandrous bird / A. Kosztolányi, Z. Barta, C. Küpper, T. Székely
Dátum:	2011
ISSN:	1010-061X
Megjegyzések:	In a number of insects, fishes and birds, the conventional sex roles are reversed: males are the main care provider, whereas females focus on matings. The reversal of typical sex roles is an evolutionary puzzle, because it challenges the foundations of sex roles, sexual selection and parental investment theory. Recent theoretical models predict that biased parental care may be a response to biased adult sex ratios (ASRs). However, estimating ASR is challenging in natural populations, because males and females often have different detectabilities. Here, we use demographic modelling with field data from 2101 individuals, including 579 molecularly sexed offspring, to provide evidence that ASR is strongly male biased in a polyandrous bird with male-biased care. The model predicts 6.1 times more adult males than females (ASR = 0.860, proportion of males) in the Kentish plover Charadrius alexandrinus. The extreme male bias is consistent between years and concordant with experimental results showing strongly biased mating opportunity towards females. Based on these results, we conjecture that parental sex-role reversal may occur in populations that exhibit extreme male-biased ASR.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban adult sex ratios mating system parental care sex ratio sex roles Egészség- és Környezettudomány
Megjelenés:	Journal Of Evolutionary Biology. - 24 : 8 (2011), p. 1842-1846. -
További szerzők:	Barta Zoltán (1967-) (biológus, zoológus) Küpper, Clemens Székely T.
Pályázati támogatás:	TÁMOP-4.2.1/B-09/1-KONV-2010-0007 TÁMOP Viselkedésökológiai Kutatócsoport
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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