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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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DOI
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2.

001-es BibID:BIBFORM018765
Első szerző:Bauer, Silke
Cím:Animal migration : linking models and data beyond taxonomic limits / Silke Bauer, Zoltan Barta, Bruno J. Ens, Graeme C. Hays, John M. McNamara, Marcel Klaassen
Dátum:2009
ISSN:1744-9561
Megjegyzések:An international workshop on animal migration was held at the Lorentz Center in Leiden, The Netherlands, 2-6 March 2009, bringing together leading theoreticians and empiricists from the major migratory taxa, aiming at the identification of cutting-edge questions in migration research that cross taxonomic borders.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
evolution of migration
migration strategies
currencies of migration
predictability
tracking of migrants
graphical user interface migration models
Megjelenés:Biology Letters. - 5 : 4 (2009), p. 433-435. -
További szerzők:Barta Zoltán (1967-) (biológus, zoológus) Ens, Bruno J. Hays, Graeme C. McNamara, John M. Klaassen, Marcel
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Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM005420
Első szerző:Hauber, Mark E.
Cím:Experimental shift in hosts acceptance threshold of inaccurate-mimic brood parasite eggs / Márk E. Hauber, Csaba Moskát and Miklós Bán
Dátum:2006
Megjegyzések:Hosts are expected to evolve resistance stra- tegies that efficiently detect and resist exposure to virulent parasites and pathogens. When rec- ognition is not error-proof, the acceptance threshold used by hosts to recognize parasites should be context dependent and become more restrictive with increasing predictability of parasitism. Here, we demonstrate that decisions of great reed warblers Acrocephalus arundinaceus to reject parasitism by the com- mon cuckoo Cuculus canorus vary adaptively within a single egg-laying bout. Hosts typically accept one of their own eggs with experimen- tally added spots and the background colour left visible. In contrast, hosts reject such spotted eggs when individuals had been previously exposed to and rejected one of their own eggs whose background colour had been entirely masked. These results support patterns of adaptive modulation of antiparasitic strategies through shifts in the acceptance threshold of hosts and suggest a critical role for experience in the discrimination decisions between inac- curate-mimic parasite eggs and hosts' own eggs.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Biology Letters. - 2 (2006), p. 177-180. -
További szerzők:Bán Miklós (1975-) (biológus) Moskát Csaba
Internet cím:DOI
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elektronikus változat
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4.

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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5.

001-es BibID:BIBFORM030376
Első szerző:Végvári Zsolt (biológus)
Cím:Consistent avoidance of human disturbance over large geographical distances by a migratory bird / Zsolt Végvári, Zoltán Barta, Pekka Mustakallio, Tamás Székely
Dátum:2011
ISSN:1744-9561
Megjegyzések:Recent works on animal personalities have demonstrated that individuals may show consistent behaviour across situations and contexts. These studies were often carried out in one location and/ or during short time intervals.Many animals, however, migrate and spend their life in several geographically distinct locations, and they may either adopt specific behaviours to the local environment or keep consistent behaviours over ecologically distinct locations. Long-distance migratory species offer excellent opportunities to test whether the animals maintain their personalities over large geographical scale, although the practical difficulties associated with these studies have hampered such tests. Here, we demonstrate for the first time consistency in disturbancetolerance behaviour in a long-distance migratory bird, using the common crane Grus grus as an ecological model species. Cranes that hatched in undisturbed habitats in Finland choose undisturbed migratory stop-over sites in Hungary, 1300? 2000 km away from their breeding ground. This is remarkable, because these sites are not only separated by large distances, they also differ ecologically: the breeding sites are wooded bogs and subarctic tundra, whereas the migratory stop-over sites are temperate zone alkaline grasslands. The significance of our study goes beyond evolutionary biology and behavioural ecology: local effects on behaviour may carry over large distances, and this hitherto hidden implication of habitat selection needs to be incorporated into conservation planning.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
carry-over
human disturbance
personality
common crane
wetland conservation
Megjelenés:Biology Letters. - 7 : 6 (2011), p. 814-817. -
További szerzők:Barta Zoltán (1967-) (biológus, zoológus) Mustakallio, Pekka Székely Tamás (1959-) (biológus)
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6.

001-es BibID:BIBFORM067079
035-os BibID:(cikkazonosító)20150678
Első szerző:Vincze Orsolya (biológus)
Cím:Brain regions associated with visual cues are important for bird migration / Orsolya Vincze, Csongor I. Vágási, Péter L. Pap, Gergely Osváth, Anders Pape Møller
Dátum:2015
ISSN:1744-9561
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Biology Letters. - 11 (2015), p. 1-4. -
További szerzők:Vágási Csongor István Pap Péter László (ökológus) Osváth Gergely (1985-) (biológus) Møller, Anders P.
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