About
Contact
Help
Sending publications
How to publish
Advanced Search
View Item 
  •   Home
  • Facultad de Ciencias
  • Artículos de revistas
  • View Item
  •   Home
  • Facultad de Ciencias
  • Artículos de revistas
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse byCommunities and CollectionsDateAuthorsTitlesSubjectsThis CollectionDateAuthorsTitlesSubjects

My Account

Login to my accountRegister
Biblioteca Digital - Universidad de Chile
Revistas Chilenas
Repositorios Latinoamericanos
Tesis LatinoAmericanas
Tesis chilenas
Related linksRegistry of Open Access RepositoriesOpenDOARGoogle scholarCOREBASE
My Account
Login to my accountRegister

MODULATION OF THE ADRENOCORTICAL RESPONSES TO ACUTE STRESS IN NORTHERN AND SOUTHERN POPULATIONS OF ZONOTRICHIA

Artículo
Thumbnail
Open/Download
IconWingfield_MODULATION_OF_THE_ADRENOCORTICAL2008.pdf (243.3Kb)
Publication date
2008
Metadata
Show full item record
Cómo citar
Wingfield, John C.
Cómo citar
MODULATION OF THE ADRENOCORTICAL RESPONSES TO ACUTE STRESS IN NORTHERN AND SOUTHERN POPULATIONS OF ZONOTRICHIA
.
Copiar
Cerrar

Author
  • Wingfield, John C.;
  • Moore, Ignacio T.;
  • Vásquez Salfate, Rodrigo;
  • Sabat Kirkwood, Alejandro Pablo;
  • Busch, Shallin;
  • Clark, Aaron;
  • Addis, Elizabeth;
  • Prado, Federico;
  • Wada, Haruka;
Abstract
How animals respond to perturbations of the environment is relevant to the effects of global climate change and human disturbance. The physiological mechanisms underlying facultative responses to unpredictable perturbations of the environment will allow us to understand why some populations are able to cope more than others. This is important for basic biology as well as for conservation. Northern populations of White-crowned Sparrow (Zonotrichia leucophrys), show varying degrees of modulation of the adrenocortical response to acute stress early in the breeding season. These variations are related to a short breeding season at high latitudes and altitudes (up-regulation of the stress response), and possibly degree of parental care (down-regulation of the stress response). Investigations of many taxa from the northern hemisphere indicate these types of modulation are widespread among vertebrates. However, modulation of the adrenocortical response to stress is much less well-known in the southern hemisphere and Neotropical birds present an ideal model system to test whether patterns of hormonal responses to stress in the northern hemisphere are consistent worldwide. Equatorial, high altitude, populations of the Rufous-collared Sparrow (Z. capensis costaricensis), a southern congener of the White-crowned Sparrow, have long breeding seasons, but show no early breeding up-regulation of the adrenocortical responses to stress. This pattern is more similar to mid-latitude, low altitude, populations of White-crowned Sparrows. Whether austral high latitude and altitude populations of the Rufous-collared Sparrows modulate these processes, under presumably similar constraints of mid- to high latitude seasonality in the north, is currently under investigation.
Patrocinador
Much of the research cited in this review was supported by grant numbers OPP- 9911333 and IBN-0317141 from the National Science Foundation to J.C. Wingfield. RAV acknowledges support from IEB - grant P05-002- ICM.
Identifier
URI: https://repositorio.uchile.cl/handle/2250/119026
Quote Item
ORNITOLOGIA NEOTROPICAL 19 (Suppl.): 241–251, 2008
Collections
  • Artículos de revistas
xmlui.footer.title
31 participating institutions
More than 73,000 publications
More than 110,000 topics
More than 75,000 authors
Published in the repository
  • How to publish
  • Definitions
  • Copyright
  • Frequent questions
Documents
  • Dating Guide
  • Thesis authorization
  • Document authorization
  • How to prepare a thesis (PDF)
Services
  • Digital library
  • Chilean academic journals portal
  • Latin American Repository Network
  • Latin American theses
  • Chilean theses
Dirección de Servicios de Información y Bibliotecas (SISIB)
Universidad de Chile

© 2020 DSpace
  • Access my account