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001-es BibID:	BIBFORM108000
035-os BibID:	(WoS)000367374000015 (Scopus)84946866547
Első szerző:	Dakin, Roslyn
Cím:	Plumage colour is associated with partner parental care in mutually ornamented tree swallows / R. Dakin, A. Z. Lendvai, J. Q. Ouyang, I. T. Moore, F. Bonier
Dátum:	2016
ISSN:	0003-3472
Megjegyzések:	Sexually selected traits can signal an individual's ability to contribute offspring care. Differential allocation theory posits that when these same traits also influence brood value, it may be adaptive for partners to adjust care in response to their mates' traits. Evaluating the strength and direction of parental quality signalling and differential allocation is thus essential to understand selection on ornamental traits. We examined relationships between plumage colour and parental care in tree swallows, Tachycineta bicolor, a mutually ornamented species in which plumage colour is related to male and female reproductive performance. Using a model of avian vision to quantify parental colour trait variation, we found that male and female tree swallows that were paired to partners with greener, more saturated plumage colour fed offspring at higher rates. Among tree swallow pairs where both partners were in their second year of breeding or older, individuals with greener, more saturated plumage colour also fed their offspring at higher rates. We show that offspring of males that provisioned more often tended to achieve greater body mass independent of the colour traits of their parents. Our results suggest a role for partner parental care in selection on female ornamentation in this species.
Tárgyszavak:	Természettudományok Biológiai tudományok esettanulmány folyóiratcikk
Megjelenés:	Animal Behaviour. - 111 (2016), p. 111-118. -
További szerzők:	Lendvai Ádám Zoltán (1977-) (biológus) Ouyang, Qiang Moore, Ignacio T. Bonier, Fraces
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM078432
035-os BibID:	(cikkazonosító)185 (WoS)000450519600002 (Scopus)85056825087
Első szerző:	Lendvai Ádám Zoltán (biológus)
Cím:	Male parental investment reflects the level of partner contributions and brood value in tree swallows / Lendvai Ádám Zoltán, Caglar Akcay, Mark Stanback, Mark F. Haussmann, Ignacio T. Moore, Fraces Bonier
Dátum:	2018
ISSN:	0340-5443
Megjegyzések:	Biparental care presents an interesting case of cooperation and conflict between unrelated individuals. Several models have been proposed to explain how parents should respond to changes in each other's parental care to maximize their own fitness, predicting no change, partial compensation, or matching effort as a response. Here, we present an experiment in tree swallows (Tachycineta bicolor) in which we increased the offspring provisioning of females by presenting them, but not their mates, with additional nestling begging calls using automated playbacks. We performed this experiment in two populations differing in future breeding opportunities. We found that in response to a temporary increase in female parental effort, males in the northern population (with lower future breeding opportunities and thus higher brood value) matched the increased effort, whereas males in the southern population did not. We also found that increases in parental care during playbacks were driven by the females (i.e., females initiated the increased effort and their mates followed them) in the northern population but not the southern population. These results support the idea that with incomplete information about the brood value and need, cues or signals from the partner might become important in coordinating parental care.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Biparental care Parental effort Negotiation Sexual conflict Tree swallow
Megjelenés:	Behavioral Ecology And Sociobiology. - 72 : 12 (2018), p. 1-11. -
További szerzők:	Akcay, Caglar Stanback, Mark Haussmann, Mark F. Moore, Ignacio T. Bonier, Fraces
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM081452
035-os BibID:	(cikkazonosító)219
Első szerző:	Ouyang, Jenny Q.
Cím:	Weathering the storm : parental effort and experimental manipulation of stress hormones predict brood survival / J. Q. Ouyang, Á. Z. Lendvai, R. Dakin, A. D. Domalik, V. J. Fasanello, B. G. Vassallo, M. F. Haussmann, I. T. Moore. F. Bonier
Dátum:	2015
ISSN:	1471-2148
Megjegyzések:	Background Unpredictable and inclement weather is increasing in strength and frequency, challenging organisms to respond adaptively. One way in which animals respond to environmental challenges is through the secretion of glucocorticoid stress hormones. These hormones mobilize energy stores and suppress non-essential physiological and behavioral processes until the challenge passes. To investigate the effects of glucocorticoids on reproductive decisions, we experimentally increased corticosterone levels (the primary glucocorticoid in birds) in free-living female tree swallows, Tachycineta bicolor, during the chick-rearing stage. Due to an unprecedented cold and wet breeding season, 90 % of the nests in our study population failed, which created a unique opportunity to test how challenging environmental conditions interact with the physiological mechanisms underlying life-history trade-offs. Results We found that exogenous corticosterone influenced the regulation of parental decisions in a context-dependent manner. Control and corticosterone-treated females had similar brood failure rates under unfavorable conditions (cold and rainy weather), but corticosterone treatment hastened brood mortality under more favorable conditions. Higher female nest provisioning rates prior to implantation were associated with increased probability of brood survival for treatment and control groups. However, higher pre-treatment male provisioning rates were associated with increased survival probability in the control group, but not the corticosterone-treated group. Conclusions These findings reveal complex interactions between weather, female physiological state, and partner parental investment. Our results also demonstrate a causal relationship between corticosterone concentrations and individual reproductive behaviors, and point to a mechanism for why naturally disturbed populations, which experience multiple stressors, could be more susceptible and unable to respond adaptively to changing environmental conditions.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Corticosterone Stress Reproduction Tree swallow Tachycineta bicolor Biparental care Inclement weather Hormone implant
Megjelenés:	BMC Evolutionary Biology. - 15 : 1 (2015), p. 1-8. -
További szerzők:	Lendvai Ádám Zoltán (1977-) (biológus) Dakin, Roslyn Domalik, Alice D. Fasanello, Vincent J. Vassallo, B. G. Haussmann, Mark F. Moore, Ignacio T. Bonier, Fraces
Pályázati támogatás:	OTKA K113108 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM081429
Első szerző:	Ouyang, Jenny Q.
Cím:	Do Hormones, Telomere Lengths, and Oxidative Stress form an Integrated Phenotype? : A Case Study in Free-Living Tree Swallows / J. Q. Ouyang, Á. Z. Lendvai, I. T. Moore, F. Bonier, M. F. Haussmann
Dátum:	2016
ISSN:	1540-7063
Megjegyzések:	Synopsis All organisms must anticipate and balance energetic demands and available resources in order to maximize fitness. As hormones coordinate many interactions between an organism's internal condition and the external environment, they may be key in mediating the allocation of resources to meet these demands. However, given that individuals differ considerably in how they react to changes in energetic demand, we asked whether variations in endocrine traits also correspond with life history variation. We tested whether natural variation in glucocorticoid hormone levels, oxidative stress measurements, and condition related to reproductive effort in a free-living songbird, the tree swallow, Tachycineta bicolor. We then tested whether any of these traits predicted the probability of a particular individual's return to the local population in the following two years, an indicator of survival in this philopatric species. We found that males and females with longer telomeres had lighter nestlings. Moreover, individuals with lower plasma antioxidant capacity and higher reactive oxygen metabolites (i.e., greater oxidative stress) were less likely to return to the population. However, none of these traits were related to glucocorticoid levels. Our findings suggest a trade-off between reproduction and survival, with individuals with shorter telomeres having heavier nestlings but potentially paying a cost in terms of higher oxidative stress and lower survival. Interestingly, the evidence of this trade-off was unrelated to natural variation in glucocorticoids.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Integrative And Comparative Biology. - 56 : 2 (2016), p. 138-145. -
További szerzők:	Lendvai Ádám Zoltán (1977-) (biológus) Moore, Ignacio T. Bonier, Fraces Haussmann, Mark F.
Pályázati támogatás:	OTKA K113108 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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