By John Maynard-Smith, David Harper

Why are animal signs trustworthy? this is often the imperative challenge for evolutionary biologists attracted to indications. in fact, now not all signs are trustworthy; yet so much are, in a different way receivers of signs might forget about them. a couple of theoretical solutions were proposed and empirical experiences made, yet there nonetheless is still a large amount of confusion. The authors, one a theoretician the opposite a fieldworker, introduce a feeling of order to this chaos. an important reason for confusion has been the tendency for various researchers to take advantage of both an analogous time period with various meanings, or diverse phrases with an analogous which means. The authors try and make clear those alterations. A moment reason for confusion has arisen simply because many biologists proceed to imagine that there's just one right reason behind sign reliability. The authors argue that the reliability of indications is maintained in different methods, appropriate in numerous conditions, and that biologists needs to discover ways to distinguish among them. during this publication they clarify the several theories, provide examples of signalling structures to which one or one other thought applies, and element to the various parts the place additional paintings, either theoretical and empirical, is needed.

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