Effects of El Niño and La Niña Southern Oscillation events on the adrenocortical responses to stress in birds of the Galapagos Islands
| Autor: | J. Patrick Kelley, Brian G. Walker, Peter H. Wrege, John C. Wingfield, Marilyn Ramenofsky, Martin Wikelski, Michaela Hau, Robert Eric Scheibling, L. Michael Romero, Nigella Hillgarth, P. Dee Boersma |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
Restraint Physical 0106 biological sciences Time Factors Rain Southern oscillation Corticosterone Stress response El Niño Southern Oscillation event La Niña Southern Oscillation event Seabirds Land birds Models Biological 010603 evolutionary biology 01 natural sciences Charadriiformes chemistry.chemical_compound Endocrinology Species Specificity Stress Physiological ddc:570 biology.animal Animals El Nino-Southern Oscillation Islands biology Ecology 010604 marine biology & hydrobiology Global warming Temperature Brood La Niña chemistry El Niño Habitat Adrenal Cortex Female Animal Science and Zoology Ecuador Seabird |
| Zdroj: | General and Comparative Endocrinology. 259:20-33 |
| ISSN: | 0016-6480 |
| DOI: | 10.1016/j.ygcen.2017.10.015 |
| Popis: | El Niño Southern Oscillation events (ENSO) and the subsequent opposite weather patterns in the following months and years (La Niña) have major climatic impacts, especially on oceanic habitats, affecting breeding success of both land and sea birds. We assessed corticosterone concentrations from blood samples during standardized protocols of capture, handling and restraint to simulate acute stress from 12 species of Galapagos Island birds during the ENSO year of 1998 and a La Niña year of 1999. Plasma levels of corticosterone were measured in samples collected at capture (to represent non-stressed baseline) and subsequently up to 1 h post-capture to give maximum corticosterone following acute stress, and total amount of corticosterone that the individual was exposed to during the test period (integrated corticosterone). Seabird species that feed largely offshore conformed to the brood value hypothesis whereas inshore feeding species showed less significant changes. Land birds mostly revealed no differences in the adrenocortical responses to acute stress from year to year with the exception of two small species ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect