Brood Defence in Great Tit (Parus Major) Pairs and the Concorde Fallacy
Theory predicts that an animal’s decision of how much to invest into an ongoing project should depend only on future benefits and not on past costs (Dawkins and Carlisle 1976, Boucher 1977). A Gosleriolation of this rule has become known as the Concorde fallacy. But past costs and future benefits are often closely correlated. This difficulty may be circumvented by uncoupling both, i.e. manipulating future benefits and leaving costs unchanged or vice versa (Robertson and Biermann 1979, Weatherhead 1982, Curio 1983, Carlisle 1985, Windt and Curio 1986).
KeywordsClutch Size Risk Index Brood Size Future Benefit Nest Defence
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