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001-es BibID:	BIBFORM107993
035-os BibID:	(WoS)000382245200001 (Scopus)84982102933
Első szerző:	Dakin, Roslyn
Cím:	Weather matters: begging calls are temperatureand size-dependent signals of offspring state / Dakin, Roslyn, Ouyang, Jenny Q., Lendvai, Ádám Z., Haussmann, Mark F., Moore, Ignacio T., Bonier, Frances
Dátum:	2016
ISSN:	0005-7959 1568-539X
Megjegyzések:	Begging calls provide a way for parents to gauge offspring state. Although temperature is known to affect call production, previous studies have not examined the influence of ambient temperature at the nest. We recorded ambient temperature and begging calls of 3 day-old tree swallows (Tachycineta bicolor). Our results indicate that typical daily temperature flux can dramatically alter a brood`s begging calls, depending on body size. Broods with small (low body mass) nestlings decreased the rate and length of their calls at colder temperatures, consistent with a biophysical constraint. In contrast, broods with large (high body mass) nestlings increased the rate of their calls at colder temperatures. Parents responded in a context-dependent manner, returning more rapidly after smaller nestlings gave longer begging calls. Our results suggest that the function of offspring begging calls is highly dynamic, with environmental conditions altering the relationship between begging calls and offspring state.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk communication solicitation parent-offspring conflict environment honest signal tree swallow
Megjelenés:	Behaviour. - 153 : 8 (2016), p. 871-896. -
További szerzők:	Ouyang, Jenny Q. Lendvai Ádám Zoltán (1977-) (biológus) Haussmann, Mark F. Moore, Ignacio T. Bonier, Frances
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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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:	BIBFORM107996
035-os BibID:	(cikkazonosító)e0141194 (Wos)000364433100024 (Scopus)84955440104
Első szerző:	Lendvai Ádám Zoltán (biológus)
Cím:	Analysis of the Optimal Duration of Behavioral Observations Based on an Automated Continuous Monitoring System in Tree Swallows (Tachycineta bicolor): Is One Hour Good Enough? / Ádám Z. Lendvai, Çağlar Akçay, Jenny Q. Ouyang, Roslyn Dakin, Alice D. Domalik, Prianka S. St John, Mark Stanback, Ignacio T. Moore1, Frances Bonier
Dátum:	2015
ISSN:	1932-6203
Megjegyzések:	Studies of animal behavior often rely on human observation, which introduces a number of limitations on sampling. Recent developments in automated logging of behaviors make it possible to circumvent some of these problems. Once verified for efficacy and accuracy, these automated systems can be used to determine optimal sampling regimes for behavioral studies. Here, we used a radio-frequency identification (RFID) system to quantify parental effort in a bi-parental songbird species: the tree swallow (Tachycineta bicolor). We found that the accuracy of the RFID monitoring system was similar to that of video-recorded behavioral observations for quantifying parental visits. Using RFID monitoring, we also quantified the optimum duration of sampling periods for male and female parental effort by looking at the relationship between nest visit rates estimated from sampling periods with different durations and the total visit numbers for the day. The optimum sampling duration (the shortest observation time that explained the most variation in total daily visits per unit time) was 1h for both sexes. These results show that RFID and other automated technologies can be used to quantify behavior when human observation is constrained, and the information from these monitoring technologies can be useful for evaluating the efficacy of human observation methods.
Tárgyszavak:	Természettudományok Biológiai tudományok esettanulmány folyóiratcikk
Megjelenés:	Plos One. - 10 : 11 (2015), p. 1-11. -
További szerzők:	Akcay, Caglar Ouyang, Jenny Q. Dakin, Roslyn Domalik, Alice D. St John, Prianka S. Stanback, Mark Moore, Ignacio T. Bonier, Frances
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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