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      Begging the question: are offspring solicitation behaviours signals of need?

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      Trends in Ecology & Evolution
      Elsevier BV

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          Biological signals as handicaps.

          An ESS model of Zahavi's handicap principle is constructed. This allows a formal exposition of how the handicap principle works, and shows that its essential elements are strategic. The handicap model is about signalling, and it is proved under fairly general conditions that if the handicap principle's conditions are met, then an evolutionarily stable signalling equilibrium exists in a biological signalling system, and that any signalling equilibrium satisfies the conditions of the handicap principle. Zahavi's major claims for the handicap principle are thus vindicated. The place of cheating is discussed in view of the honesty that follows from the handicap principle. Parallel signalling models in economics are discussed. Interpretations of the handicap principle are compared. The models are not fully explicit about how females use information about male quality, and, less seriously, have no genetics. A companion paper remedies both defects in a model of the handicap principle at work in sexual selection.
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            Why have birds got multiple sexual ornaments?

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              Signalling of need by offspring to their parents

              H. Godfray (1991)
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                Author and article information

                Journal
                Trends in Ecology & Evolution
                Trends in Ecology & Evolution
                Elsevier BV
                01695347
                January 1997
                January 1997
                : 12
                : 1
                : 11-15
                Article
                10.1016/S0169-5347(96)10061-6
                30b8c37f-7c27-4a06-9df7-fa4ce2efebd9
                © 1997

                http://www.elsevier.com/tdm/userlicense/1.0/

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