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001-es BibID:	BIBFORM107992
035-os BibID:	(cikkazonosító)160740 (Wos)000391731800024 (Scopus)85006298203
Első szerző:	Akcay, Caglar
Cím:	Strategic adjustment of parental care in tree swallows: life-history trade-offs and the role of glucocorticoids / Çağlar Akçay, Ádám Z. Lendvai, Mark Stanback, Mark Haussmann, Ignacio T. Moore, Fran Bonier
Dátum:	2016
ISSN:	2054-5703
Megjegyzések:	Life-history theory predicts that optimal strategies of parental investment will depend on ecological and social factors, such as current brood value and offspring need. Parental care strategies are also likely to be mediated in part by the hypothalamic- pituitary-adrenal axis and glucocorticoid hormones. Here, we present an experiment in tree swallows (Tachycineta bicolor), a biparental songbird with wide geographical distribution, asking whether parental care is strategically adjusted in response to signals of offspring need and brood value and if so, whether glucocorticoids are involved in these adjustments. Using an automated playback system, we carried out playbacks of nestling begging calls specifically to females in two populations differing in their brood value: a northern population in Ontario, Canada (relatively higher brood value) and a southern population in North Carolina, USA (relatively lower brood value). We quantified female offspring provisioning rates before and during playbacks and plasma corticosterone levels (cort) once during late incubation and once immediately after playbacks. Females in both populations increased feeding rates temporarily during the first 2 h of playback but the increase was not sustained for the entire duration of playback (6 h). Cort levels from samples at the end of the playback did not differ between control females and females that received playbacks. However, females that had higher increases in cort between the incubation and nestling period had greater fledging success. These results suggest that females are able to strategically respond to offspring need, although the role of glucocorticoids in this strategic adjustment remains unclear.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk corticosterone nestling begging provisioning brood value latitude fitness
Megjelenés:	Royal Society Open Science. - 3 : 12 (2016), p.1-12. -
További szerzők:	Lendvai Ádám Zoltán (1977-) (biológus) Stanback, Mark 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:	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:	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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