Download Animal Camouflage: Mechanisms and Function by Martin Stevens, Sami Merilaita PDF

By Martin Stevens, Sami Merilaita

Within the final decade, learn at the formerly dormant box of camouflage has complex quickly, with a number of reports tough conventional thoughts, investigating formerly untested theories and incorporating a better appreciation of the visible and cognitive platforms of the observer. utilizing experiences of either actual animals and synthetic platforms, this booklet synthesises the present nation of play in camouflage learn and figuring out. It introduces the different sorts of camouflage and the way they paintings, together with history matching, disruptive colour and obliterative shading. It additionally demonstrates the methodologies used to review them and discusses how camouflage pertains to different topics, fairly in regards to what it could let us know approximately visible belief. the combination of basic study and experiences indicates scholars and researchers the place the sector presently stands and the place interesting and demanding difficulties stay to be solved, illustrating how the examine of camouflage is probably going to development sooner or later.

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Functional architecture of the macaque visual cortex. Proceedings of the Royal Society, Series B, 198, 1–59. Kelber A, Vorobyev, M. & Osorio, D. 2003. Animal colour vision: behavioural tests and physiological concepts. Biological Reviews, 78, 81–118. Kiltie, R. A. & Laine, A. F. 1992. Visual textures, machine vision and animal camouflage. Trends in Ecology and Evolution, 7, 163–166. Kiltie, R. , Fan, J. & Laine, A. F. 1995. A wavelet-based metric for visual discrimination with applications in evolutionary ecology.

Merilaita, published by Cambridge University Press. C Cambridge University Press 2011. 18 S. Merilaita & M. 1 In background matching the coloration of an animal resembles the visual background of the animal. This adaptation decreases the risk of the animal being detected. For example, the grayling (Hipparchia semele) is a butterfly that appears to match its background (a lichencovered rock) well. However, which aspects of potential concealment are necessary and which are less important to produce a background-matching colour pattern that effectively deceives predator perception?

Another way, instead of comparing different species, is to use a colour-changing species as did Shohet et al. (2007). They photographed cuttlefish on different backgrounds and used pattern analysis to identify those parts of the animal’s body that changed significantly when a given background pattern was present. Pattern analysis in comparative studies could be used, for example, to identify those aspects of patterning that are important to match closely to achieve successful pattern matching. Another pattern analysis approach is to focus on spatial frequency.

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