Adrenocortical responses to offspring-directed threats in two open-nesting birds

Butler, Luke K.; Bisson, Isabelle-Anne; Hayden, Timothy J.; Wikelski, Martin; Romero, L. Michael

Adrenocortical responses to offspring-directed threats in two open-nesting birds

Dateien

2009_Butler_et_al._Gen_Comp_Endo.pdfGröße: 552.95 KBDownloads: 419

Datum

2009

Autor:innen

Butler, Luke K.

Bisson, Isabelle-Anne

Hayden, Timothy J.

Wikelski, Martin

Romero, L. Michael

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

General and comparative endocrinology. 2009, 162(3), pp. 313-318. ISSN 0016-6480. eISSN 1095-6840. Available under: doi: 10.1016/j.ygcen.2009.04.008

Zusammenfassung

Dependent young are often easy targets for predators, so for many parent vertebrates, responding to offspring-directed threats is a fundamental part of reproduction. We tested the parental adrenocortical response of the endangered black-capped vireo (Vireo atricapilla) and the common white-eyed vireo (Vireo griseus) to acute and chronic threats to their offspring. Like many open-nesting birds, our study species experience high offspring mortality. Parents responded behaviorally to a predator decoy or human 1 2 m from their nests, but, in contrast to similar studies of cavity-nesting birds, neither these acute threats nor chronic offspring-directed threats altered plasma corticosterone concentrations of parents. Although parents in this study showed no corticosterone response to offspring-directed threats, they always increased corticosterone concentrations in response to capture. To explain these results, we propose that parents perceive their risk of nest-associated death differently depending on nest type, with cavity-nesting adults perceiving greater risk to themselves than open-nesters that can readily detect and escape from offspring-directed threats. Our results agree with previous studies suggesting that the hypothalamic pituitary adrenal axis, a major physiological mechanism for coping with threats to survival, probably plays no role in coping with threats to offspring when risks to parents and offspring are not correlated. We extend that paradigm by demonstrating that nest style may influence how adults perceive the correlation between offspring-directed and self-directed threats.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Chronic stress, Corticosterone, Parental care, Nest predation, Stress response

Zitieren

ISO 690

BUTLER, Luke K., Isabelle-Anne BISSON, Timothy J. HAYDEN, Martin WIKELSKI, L. Michael ROMERO, 2009. Adrenocortical responses to offspring-directed threats in two open-nesting birds. In: General and comparative endocrinology. 2009, 162(3), pp. 313-318. ISSN 0016-6480. eISSN 1095-6840. Available under: doi: 10.1016/j.ygcen.2009.04.008

BibTex

@article{Butler2009Adren-6637,
  year={2009},
  doi={10.1016/j.ygcen.2009.04.008},
  title={Adrenocortical responses to offspring-directed threats in two open-nesting birds},
  number={3},
  volume={162},
  issn={0016-6480},
  journal={General and comparative endocrinology},
  pages={313--318},
  author={Butler, Luke K. and Bisson, Isabelle-Anne and Hayden, Timothy J. and Wikelski, Martin and Romero, L. Michael}
}

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Universitätsbibliographie

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