Találati lista | Tudóstér

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
Borító:
Saját polcon: