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      Costly sexual signals: are carotenoids rare, risky or required?

      1 ,
      Trends in ecology & evolution
      Elsevier BV

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          Abstract

          Theories of animal signalling emphasize the importance of costliness-to be effective, signals must be dependable; to be dependable, signals must carry costs-and carotenoid-based signals are a favoured example. The traditional view that carotenoids are costly because they are scarce still carries weight. However, biomedical research has led to alternative views on costliness, mainly related to beneficial, but also to detrimental, effects of carotenoids. Recent improvements in our understanding of carotenoids suggest that the relative importance of these mechanisms will soon be determined, leading to a fresh outlook on cost-based signalling.

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          Author and article information

          Journal
          Trends Ecol Evol
          Trends in ecology & evolution
          Elsevier BV
          0169-5347
          0169-5347
          Dec 01 1998
          : 13
          : 12
          Affiliations
          [1 ] Dept of Zoology, University of Queensland, St Lucia 4072, Queensland, Australia.
          Article
          S0169-5347(98)01484-0
          10.1016/s0169-5347(98)01484-0
          21238418
          3835c1d6-bedf-498e-8168-5a745de6b29e
          History

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