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1.

001-es BibID:BIBFORM107991
035-os BibID:(cikkazonosító)20190733 (WOS)000507289800002 (Scopus)85077885225
Első szerző:Angelier, Frédéric
Cím:When do older birds better resist stress? A study of the corticosterone stress response in snow petrels / Frédéric Angelier, Olivier Chastel, Adam Z. Lendvai, Charline Parenteau, Henri Weimerskirch, John C. Wingfield
Dátum:2020
ISSN:1744-9561
Megjegyzések:Life-history theory predicts that, to optimize their fitness, individuals should increase their reproductive effort as their residual reproductive value decreases. Accordingly, several studies have shown that individuals downregulate their glucocorticoid stress response (a proxy of reproductive investment in vertebrates) as they age, and as the subsequent reproductive value decreases. However, and surprisingly, results appear inconsistent, suggesting that the environmental context or the individual state may affect the relationship between age and reproductive effort. Here, we tested for the first time this hypothesis, and more specifically, whether this attenuation of the corticosterone stress response with advancing age depends on the energetic status of individuals. We compared the influence of age on the corticosterone stress response between fasting and non-fasting breeding snow petrels (Pagodroma nivea), an extremely long-lived bird. As expected, we found that the corticosterone stress response was attenuated in old petrels, but only when they were not fasting. Interestingly, this pattern was not apparent in fasting petrels, suggesting that old birds downregulate their corticosterone stress response and increase their parental investment only when they are in good body condition. At the ultimate level, old individuals may maintain a strong corticosterone stress response when fasting because the survival costs of increased stress resistance and parental effort might then outweigh their reproductive benefits.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Biology Letters. - 16 : 1 (2020), p. 1-4. -
További szerzők:Chastel, Olivier Lendvai Ádám Zoltán (1977-) (biológus) Parenteau, Charline Weimerskirch, Henri Wingfield, John C.
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Intézményi repozitóriumban (DEA) tárolt változat
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2.

001-es BibID:BIBFORM107997
035-os BibID:(Wos)000352630300013 (Scopus)84926419812
Első szerző:Brischoux, Francois
Cím:Marine lifestyle is associated with higher baseline corticosterone levels in birds / Francois Brischoux, Ádám Z. Lendvai, Ádám Z., Veronika Bókony, Olivier Chastel, Frédéric Angelier
Dátum:2015
ISSN:0024-4066
Megjegyzések:Because seawater is hyperosmotic relative to body fluids of most vertebrates, marine lifestyle is expected to strongly influence the physiology of marine tetrapods. Regulating the salt content of body fluids is energetically costly; and osmoregulatory organs may not totally overcome salt load and/or water loss. As a consequence, marine lifestyle should influence physiological systems involved in the maintenance of the physiological balance (homeostasis), in the mobilisation of energetic resources (e.g., to fuel salt excretion), or in the acquisition of resources (e.g., fresh water). Corticosterone (CORT) is one such ?generalist` mediator that is linked with energy expenditure, physiological stress and that activates osmoregulation. As a consequence, CORT is expected to be overall higher in marine tetrapods but this hypothesis has never been tested. Using comparative analyses, we tested this hypothesis in birds, a lineage for which available data on baseline CORT allow comparing marine versus terrestrial species, and species with or without salt glands. We found that marine species (and species with salt glands) display significantly higher baseline CORT during the wintering (but not the breeding) stage. Although salt glands` presence was tightly linked to phylogeny, our results suggest that marine lifestyle may impose a strong, but overlooked, influence on the allostasis-related physiology of marine birds. Such habitat-related variation in physiology is a major phenomenon to explore owing to its general implications for understanding the physiological basis of evolutionary transitions in habitat use.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
mineralocorticoid
osmoregulation
phylogenetic comparative analysis
salinity
salt glands
Megjelenés:Biological Journal Of The Linnean Society. - 115 : 1 (2015), p. 154-161. -
További szerzők:Lendvai Ádám Zoltán (1977-) (biológus) Bókony Veronika (alkalmazott zoológus) Chastel, Olivier Angelier, Frédéric
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Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM081449
035-os BibID:(cikkazonosító)20150272 (PMID)26179799
Első szerző:Lendvai Ádám Zoltán (biológus)
Cím:Within-individual plasticity explains age-related decrease in stress response in a short-lived bird / Ádám Z. Lendvai, Mathieu Giraudeau, Veronika Bókony, Frédéric Angelier, Olivier Chastel
Dátum:2015
ISSN:1744-9561
Megjegyzések:A crucial problem for every organism is how to allocate energy between competing life-history components. The optimal allocation decision is often state-dependent and mediated by hormones. Here, we investigated how age, a major state variable affects individuals' hormonal response to a standardized stressor: a trait that may reflect allocation between self-maintenance and reproduction. We caught free-living house sparrows and measured their hormonal (corticosterone) response to capture stress in consecutive years. Using a long-term ringing dataset, we determined the age of the birds, and we partitioned the variation into within- and among-individual age components to investigate the effects of plasticity versus selection or gene flow, respectively, on the stress response. We found large among-individual variation in the birds' hormone profiles, but overall, birds responded less strongly to capture stress as they grew older. These results suggest that stress responsiveness is a plastic trait that may vary within individuals in an adaptive manner, and natural selection may act on the reaction norms producing optimal phenotypic response in the actual environment and life-history stage.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
corticosterone
stress response
plasticity
Megjelenés:Biology Letters. - 11 : 7 (2015), p. 1-4. -
További szerzők:Giraudeau, Mathieu Bókony Veronika (alkalmazott zoológus) Angelier, Frédéric Chastel, Olivier
Pályázati támogatás:OTKA PD76862
OTKA
OTKA K113108
OTKA
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Intézményi repozitóriumban (DEA) tárolt változat
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4.

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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Intézményi repozitóriumban (DEA) tárolt változat
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5.

001-es BibID:BIBFORM107994
035-os BibID:(WOS)000373920800011 (Scopus)84961990888
Első szerző:Tartu, Sabrina
Cím:Mercury exposure, stress and prolactin secretion in an Arctic seabird: an experimental study / Sabrina Tartu, Paco Bustamante, Frédéric Angelier, Ádám Z. Lendvai, Børge Moe, Pierre Blevin, Claus Bech, Geir W. Gabrielsen, Jan Ove Bustnes, Olivier Chastel
Dátum:2015
ISSN:0269-8463 1365-2435
Megjegyzések:Life-history theory predicts that long-lived organisms should reduce parental effort under inclement environmental conditions in order to favour long-term survival. Seabirds are long-lived top predators often exposed to environmental endocrine disrupting chemicals such as mercury (Hg). Hg-contaminated birds show disrupted parental behaviour. Avian parental behaviour is governed by two key hormones in birds: corticosterone (CORT, a glucocorticoid hormone) and prolactin (PRL, a pituitary hormone involved in parental care). Any disruption of these hormones may alter the ability of an individual to adjust parental behaviour to environmental conditions. The first aim of this study was to describe the relationships between blood Hg concentrations, plasma PRL and reproductive performance in Arctic black-legged kittiwakes (Rissa tridactyla). We a found negative relationship between plasma initial PRL and blood Hg concentrations in males. Moreover, Hg concentration was negatively related to breeding success in chick-rearing males. Secondly, to study the effect of a chronic increase in CORT levels on the Hg-PRL relationship, we experimentally increased stress with CORT pellet implantation. We predicted that Hg and CORT would act synergistically on PRL and an increase in CORT concentration would steepen the Hg-PRL relationship. However, adding CORT did not steepen the Hg-PRL relationship. Hatching success was significantly lower in CORT-implanted males than in controls, and breeding success was not reduced in CORT-implanted male kittiwakes with high levels of blood Hg. Our results suggest that Hg may impair reproductive performance through a disruption of PRL secretion. Contrary to our prediction, Hg and CORT did not act synergistically and the underlying mechanisms associating CORT and Hg with PRL might be more complex than a single interaction between two factors.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Functional Ecology. - 30 : 4 (2015), p. 596-604. -
További szerzők:Bustamante, Paco Angelier, Frédéric Lendvai Ádám Zoltán (1977-) (biológus) Moe, Børge Blévin, Pierre Bech, Claus Gabrielsen, Geir Wing Bustnes, Jan Ove Chastel, Olivier
Pályázati támogatás:K-113108
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Intézményi repozitóriumban (DEA) tárolt változat
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