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dc.contributor.authorGonzález-Gómez P.L.
dc.contributor.authorEcheverria V.
dc.contributor.authorEstades C.F.
dc.contributor.authorPerez J.H.
dc.contributor.authorKrause J.S.
dc.contributor.authorSabat P.
dc.contributor.authorLi J.
dc.contributor.authorKültz D.
dc.contributor.authorWingfield J.C.
dc.date.accessioned2020-09-02T22:19:23Z
dc.date.available2020-09-02T22:19:23Z
dc.date.issued2018
dc.identifier10.1111/1365-2656.12846
dc.identifier.citation87, 5, 1364-1382
dc.identifier.issn00218790
dc.identifier.urihttps://hdl.handle.net/20.500.12728/4725
dc.descriptionThe timing and duration of life-history stages (LHSs) within the annual cycle can be affected by local environmental cues which are integrated through endocrine signalling mechanisms and changes in protein function. Most animals express a single LHS within a given period of the year because synchronous expression of LHSs is thought to be too costly energetically. However, in very rare and extremely stable conditions, breeding and moult have been observed to overlap extensively in rufous-collared sparrows (Zonotrichia capensis) living in valleys of the Atacama Desert—one of the most stable and aseasonal environments on Earth. To examine how LHS traits at different levels of organization are affected by environmental variability, we compared the temporal organization and duration of LHSs in populations in the Atacama Desert with those in the semiarid Fray Jorge National Park in the north of Chile—an extremely seasonal climate but with unpredictable droughts and heavy rainy seasons. We studied the effects of environmental variability on morphological variables related to body condition, endocrine traits and proteome. Birds living in the seasonal environment had a strict temporal division of LHSs, while birds living in the aseasonal environment failed to maintain a temporal division of LHSs resulting in direct overlap of breeding and moult. Further, higher circulating glucocorticoids and androgen concentrations were found in birds from seasonal compared to aseasonal populations. Despite these differences, body condition variables and protein expression were not related to the degree of seasonality but rather showed a strong relationship with hormone levels. These results suggest that animals adjust to their environment through changes in behavioural and endocrine traits and may be limited by less labile traits such as morphological variables or expression of specific proteins under certain circumstances. These data on free-living birds shed light on how different levels of life-history organization within an individual are linked to increasing environmental heterogeneity. © 2018 The Authors. Journal of Animal Ecology © 2018 British Ecological Society
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.subjectlife-history stages
dc.subjectproteomics
dc.subjectseasonality
dc.subjectstress
dc.subjecttestosterone
dc.subjectthyroid
dc.subjectannual cycle
dc.subjectbody condition
dc.subjectenvironmental cue
dc.subjectenvironmental gradient
dc.subjectgene expression
dc.subjectheterogeneity
dc.subjecthormone
dc.subjectlife history
dc.subjectmorphology
dc.subjectpasserine
dc.subjectproteomics
dc.subjectseasonality
dc.subjecttestosterone
dc.subjectAtacama Desert
dc.subjectBosque Fray Jorge National Park
dc.subjectChile
dc.subjectCoquimbo
dc.subjectAnimalia
dc.subjectAves
dc.subjectPasseridae
dc.subjectZonotrichia capensis
dc.subjectproteome
dc.subjectanimal
dc.subjectChile
dc.subjectlife cycle stage
dc.subjectseason
dc.subjectsparrow
dc.subjectAnimals
dc.subjectChile
dc.subjectLife Cycle Stages
dc.subjectProteome
dc.subjectSeasons
dc.subjectSparrows
dc.titleContrasting seasonal and aseasonal environments across stages of the annual cycle in the rufous-collared sparrow, Zonotrichia capensis: Differences in endocrine function, proteome and body condition
dc.typeArticle


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