Animal Signals (Oxford Series in Ecology and Evolution) by John Maynard-Smith, David Harper

By John Maynard-Smith, David Harper

Why are animal indications trustworthy? this is often the critical challenge for evolutionary biologists drawn to signs. after all, now not all indications are trustworthy; yet such a lot are, differently receivers of indications could forget about them. a couple of theoretical solutions were proposed and empirical experiences made, yet there nonetheless continues to be a large amount of confusion. The authors, one a theoretician the opposite a fieldworker, introduce a feeling of order to this chaos. an important explanation for confusion has been the tendency for various researchers to exploit both a similar time period with assorted meanings, or various phrases with a similar that means. The authors try to make clear those alterations. A moment reason behind 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 numerous methods, suitable in numerous conditions, and that biologists needs to discover ways to distinguish among them. during this ebook they clarify the several theories, provide examples of signalling platforms to which one or one other thought applies, and aspect to the numerous components the place additional paintings, either theoretical and empirical, is needed.

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Well-done natural history studies can be the foundation on which theoretical research can be based.  101). It is useful here, we think, to end with an extensive observation by Greene on the value of natural history studies: Good natural history is a source of timeless, priceless information for the biological sciences. It inspires theory as well as provides crucial data for answers to comprehensive, synthetic problems in ecology, ethology, evolution, and conservation biology. Despite this fact, natural history costs relatively little compared to the resultant benefits.

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The deep sea also hosts stalked barnacles of Heteralepas, which have an almost naked capitulum. At deep-sea hydrothermal vents, the basal energy of the food chain is derived from chemosynthetic bacteria. Barnacles endemic to these habitats appear to rely on the chemosynthetic bacteria for food, and at least Leucolepas longa can directly garden them on their cirri (Southward and Jones 2003). From molecular analysis (Pérez-Losada et al. 2008), it is known that all pedunculated and asymmetric barnacles endemic to vent and seep habitats (Ashinkailepas, Leucolepas, Volcanolepas, and Neoverruca) form a monophyletic unit and may therefore have invaded these environments during a single evolutionary event.

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