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001-es BibID:	BIBFORM107062
035-os BibID:	(WoS)000612128700018 (Scopus)85096396692
Első szerző:	Krause, Jesse S.
Cím:	Annual regulation of adrenocortical function in migrant and resident subspecies of white-crowned sparrow / Jesse S. Krause, Zoltán Németh, Jonathan H. Pérez, Helen E. Chmura, Karen R. Word, Hannah J. Lau, Ryan E. Swanson, Jeffrey C. Cheah, Lisa N. Quach, Simone L. Meddle, John C. Wingfield, Marilyn Ramenofsky
Dátum:	2021
ISSN:	0018-506X
Megjegyzések:	Corticosterone affects physiology and behavior both during normal daily processes but also in response to environmental challenges and is known to mediate life history trade-offs. Many studies have investigated patterns of corticosterone production at targeted times of year, while ignoring underlying annual profiles. We aimed to understand the annual regulation of hypothalamic-pituitary-adrenal (HPA) axis function of both migrant (Zonotrichia leucophrys gambelii; n = 926) and resident (Z. l. nutalli; n = 688) subspecies of white-crowned sparrow and how it is influenced by environmental conditions wind, precipitation, and temperature. We predicted that more dramatic seasonal changes in baseline and stress-induced corticosterone would occur in migrants to precisely time the onset of breeding and cope with environmental extremes on their arctic breeding grounds, while changes in residents would be muted as they experience a more forgiving breeding schedule and comparatively benign environmental conditions in coastal California. During the course of a year, the harshest conditions were experienced the summer breeding grounds for migrants, at which point they had higher corticosterone levels compared to residents. For residents, the winter months coincided with harshest conditions at which point they had higher corticosterone levels than migrants. For both subspecies, corticosterone tended to rise as environmental conditions became colder and windier. We found that the annual maxima in stress-induced corticosterone occurred prior to egg lay for all birds except resident females. Migrants had much higher baseline and acute stress-induced corticosterone during breeding compared to residents; where in a harsher environment the timing of the onset of reproduction is more critical because the breeding season is shorter. Interestingly, molt was the only stage within the annual cycle in which subspecies differences were absent suggesting that a requisite reduction in corticosterone may have to be met for feather growth. These data suggest that modulation of the HPA axis is largely driven by environmental factors, social cues, and their potential interactions with a genetic program.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Stress Hypothalamic pituitary adrenal (HPA) axis Life history stage Subspecies Corticosterone Restrain Latitude Breeding season
Megjelenés:	Hormones And Behavior. - 127 : 104884 (2021), p. 1-9. -
További szerzők:	Németh Zoltán (1976-) (biológus) Pérez, Jonathan H. Chmura, Helen E. Word, Karen R. Lau, Hannah J. Swanson, Ryan E. Cheah, Jeffrey C. Quach, Lisa N. Meddle, Simone L. Wingfield, John C. Ramenofsky, Marilyn
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM107990
035-os BibID:	(cikkazonosító)104979 (WOS)000657477300003 (Scopus)85104360231
Első szerző:	Tablado, Zulima
Cím:	Factors modulating the behavioral and physiological stress responses : Do they modify the relationship between flight initiation distance and corticosterone reactivity? / Zulima Tablado, Yves Bötsch Veronika Bókony,, Frédéric Angelier, Ádám Z. Lendvai, Susanne Jenni-Eiermann, Lukas Jenni
Dátum:	2021
ISSN:	0018-506X
Megjegyzések:	Understanding how vulnerable species are to new stressors, such as anthropogenic changes, is crucial for mitigating their potential negative consequences. Many studies have investigated species sensitivity to human disturbance by focusing on single behavioral or physiological parameters, such as flight initiation distance and glucocorticoid levels. However, little is known about the differential effect that modulating factors might have on behavioral versus physiological stress responses across species. This lack of knowledge make difficult to understand the relationship between both types of reactions, and thus to assess to what extent a behavioral reaction is representative of an internal physiological stress response or vice versa. We collected published data on bird flight initiation distances (FID) and corticosterone (CORT) responses, the two most frequently used indicators of stress reaction. We then investigated how spatio-temporal factors or species-specific characteristics relate to these behavioral and physiological stress responses, and potentially modify the relationship between them. Additionally, we evaluated the strength of the correlation between the two stress responses (behavioral and physiological). Our findings showed that FID and CORT responses were poorly correlated across species, and the lack of correlation was attributable to modulating factors (e.g. latitude and body mass) which influence behavior and physiology differently. These modulating factors, therefore, should be taken into consideration to better interpret FID and CORT responses in the context of species vulnerability to stress.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Hormones And Behavior. - 132 (2021), p. 1-10. -
További szerzők:	Bötsch, Yves Bókony Veronika (alkalmazott zoológus) Angelier, Frédéric Lendvai Ádám Zoltán (1977-) (biológus) Jenni-Eiermann, Susanne Jenni, Lukas
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