Abstract
In a past issue of Polar Biology, Meyer-Rochow andShimoyama (2008) conclude their article with “unless evi-dence can be provided in favour of, Wrstly, UV sensitiveretinal receptors in penguins and, secondly, a behaviouralrole for a UV pattern of a penguin, we would regard UVreXectivity in penguins as a biologically unimportant phe-nomenon, associated with optical properties of a structureat a particular stage of growth and development.” Here, weexpress our dissent from this statement and provide furtherevidence strongly suggesting the signi Wcance of UV signalsin intraspeciWc penguin communication.First, Bowmaker and Martin (1985) found that the conetypes of Humboldt penguins
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