Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
State-dependent sentinels: an experimental study in the Arabian babbler
Autore:
Wright, J; Maklakov, AA; Khazin, V;
Indirizzi:
Univ Wales, Sch Biol Sci, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales LL57 2UW Bangor LL57 2UW, Gwynedd, Wales Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitriani Dept Desert Ecol, IL-84990 Sede Boqer, Israel Ben Gurion Univ Negev Sede Boqer Israel IL-84990 4990 Sede Boqer, Israel Tel Aviv Univ, Dept Zool, IL-69978 Tel Aviv, Israel Tel Aviv Univ Tel Aviv Israel IL-69978 t Zool, IL-69978 Tel Aviv, Israel
Titolo Testata:
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1469, volume: 268, anno: 2001,
pagine: 821 - 826
SICI:
0962-8452(20010422)268:1469<821:SSAESI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELFISH SENTINELS; DWARF MONGOOSE; BEHAVIOR; COSTS; VIGILANCE;
Keywords:
sentinel; stare dependent; anti-predation; vigilance; cooperation; Arabian babbler;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Wright, J Univ Wales, Sch Biol Sci, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales LL57 2UW 57 2UW, Gwynedd, Wales
Citazione:
J. Wright et al., "State-dependent sentinels: an experimental study in the Arabian babbler", P ROY SOC B, 268(1469), 2001, pp. 821-826

Abstract

Natural patterns of cooperative sentinel behaviour in Arabian babblers. Turdoides squamiceps have proven consistent with state-dependent models of individually selfish anti-predator strategies. Here we demonstrate experimentally that sentinel effort within groups is determined simply hy individual state. The two highest-ranking males in eight groups were separately fed a supplement of mealworms each for one day at a time. Control days before andafter each treatment confirmed that Ilo carry-over effects occurred, and that most normal sentinel activity was carried our by alpha males, then betamales and then by. the rest of the group. When supplemented. both alpha and beta males exhibited similar marked increases in sentinel activity relative to control days. Unsupplemented males and the rest of the group incompletely compensated for these increases with reductions in sentinel effort. Differences in individual bod! mass within groups reflected natural and experimental variation in sentinel effort. Alpha and beta males weighed more than other group members, and gained mass only when supplementally fed. There was no evidence either for competitive sentinel behaviour, nor for an); increased interference between malts during the supplementation treatments. These results therefore provide strong evidence in support of the state-dependent approach to cooperative sentinel behaviour.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 02:49:08