Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Corticosterone facilitates begging and affects resource allocation in the black-legged kittiwake
Autore:
Kitaysky, AS; Wingfield, JC; Piatt, JF;
Indirizzi:
Univ Washington, Dept Zool, Seattle, WA 98195 USA Univ Washington SeattleWA USA 98195 on, Dept Zool, Seattle, WA 98195 USA US Geol Survey, Alaska Biol Serv Ctr, Anchorage, AK 99503 USA US Geol Survey Anchorage AK USA 99503 l Serv Ctr, Anchorage, AK 99503 USA
Titolo Testata:
BEHAVIORAL ECOLOGY
fascicolo: 5, volume: 12, anno: 2001,
pagine: 619 - 625
SICI:
1045-2249(200109/10)12:5<619:CFBAAR>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARENT-OFFSPRING CONFLICT; SIBLING COMPETITION; RISSA-TRIDACTYLA; PELAGIC SEABIRD; STRESS-RESPONSE; PIED FLYCATCHER; FORAGING TRIPS; ENERGETIC COST; BODY CONDITION; BEHAVIOR;
Keywords:
begging; corticosterone; food stress; kittiwakes; parent-offspring conflict; Rissa tridactyla; seabirds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Kitaysky, AS Univ Washington, Dept Zool, 24 Kincaid Hall,Box 351800, Seattle, WA 98195 USA Univ Washington 24 Kincaid Hall,Box 351800 Seattle WA USA 98195
Citazione:
A.S. Kitaysky et al., "Corticosterone facilitates begging and affects resource allocation in the black-legged kittiwake", BEH ECOLOGY, 12(5), 2001, pp. 619-625

Abstract

Parent black-legged kittiwakes (Rissa tridactyla) and their dependent chicks respond to food shortages by increasing circulating levels of corticosterone. To examine the behavioral significance of corticosterone release, we experimentally increased levels of circulating corticosterone in parents and chicks up to the levels observed during food shortages. We found that corticosterone-implanted chicks begged more frequently than sham-implanted controls. Corticosterone-implanted chicks in broods of two begged more frequently than singletons. Parent kittiwakes then responded to the increase in corticosterone levels in their chicks by increasing chick-feeding rates. However, feeding rates were not different among corticosterone-implanted chicksin broods of two and singletons. We also found that corticosterone-implanted parents spent more time away from the nest-perhaps foraging-and less time brooding/guarding chicks than sham-implanted controls. Untreated mates ofthe corticosterone-implanted bird did not compensate for the change in their partner's behavior; consequently, chicks were left unattended about 20% of the time compared to 1% at the control nests. However, corticosterone-implanted parents did not decrease their chick-feeding rates. Our findings suggest two functional implications of the increased corticosterone secretionduring food shortages in the black-legged kittiwake: it facilitates begging in chicks, and it affects time allocated by parents to guarding young at the nest. Thus, release of corticosterone might provide a mechanistic link between physiological condition and behavioral interactions among adults and their young.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/04/20 alle ore 00:57:13