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Titolo:
How to detect a cuckoo egg: A signal-detection theory model for recognition and learning
Autore:
Rodriguez-Girones, MA; Lotem, A;
Indirizzi:
Univ Groningen, Zool Lab, NL-9750 AA Haren, Netherlands Univ Groningen Haren Netherlands NL-9750 AA L-9750 AA Haren, Netherlands Tel Aviv Univ, Fac Life Sci, Dept Zool, IL-69978 Tel Aviv, Israel Tel AvivUniv Tel Aviv Israel IL-69978 t Zool, IL-69978 Tel Aviv, Israel
Titolo Testata:
AMERICAN NATURALIST
fascicolo: 6, volume: 153, anno: 1999,
pagine: 633 - 648
SICI:
0003-0147(199906)153:6<633:HTDACE>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
AVIAN BROOD PARASITISM; CUCULUS-CANORUS; EVOLUTIONARY EQUILIBRIUM; EUROPEAN PASSERINES; PIED FLYCATCHERS; REED WARBLERS; MEADOW PIPITS; HOST DEFENSES; CO-EVOLUTION; DISCRIMINATION;
Keywords:
great reed warblers; brood parasitism; Bayesian learning; signal-detection theory;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Lotem, A Univ Groningen, Zool Lab, POB 14, NL-9750 AA Haren, Netherlands Univ Groningen POB 14 Haren Netherlands NL-9750 AA , Netherlands
Citazione:
M.A. Rodriguez-Girones e A. Lotem, "How to detect a cuckoo egg: A signal-detection theory model for recognition and learning", AM NATURAL, 153(6), 1999, pp. 633-648

Abstract

This article presents a model of egg rejection in cases of brood parasitism. The model is developed in three stages in the framework of signal-detection theory. We first assume that the behavior of host females is adapted tothe relevant parameters concerning the appearance of the eggs they lay. Inthe second stage, we consider the possibility that females make perceptualerrors. In the final stage, females must learn to recognize their own eggsthrough an imprinting process. The model allows us to make a number of predictions concerning the egg types that should be rejected in different circumstances: egg rejection should increase as the parasitism rate increases and egg mimicry deteriorates; host females' erroneous ejection of their own eggs should be expected for intermediate levels of egg mimicry but not for very good or very poor mimicry; host females would benefit most from learning to recognize their own eggs when individual variability in egg characteristics is much lower than the population variability; and, when egg mimicryis poor or individual variability is very low, females should attempt to imprint on the first egg they lay, before they can be parasitized, but, whenmimicry is good and individual variability is relatively high, females must use an extended learning phase. The model provides a framework to study how the enigmatic acceptance of parasitic eggs can be explained by adaptive discrimination mechanisms.

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Documento generato il 08/07/20 alle ore 07:43:21