Search for dissertations about: "Dim light vision"
Showing result 1 - 5 of 12 swedish dissertations containing the words Dim light vision.
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1. Celestial Orientation in Dim Light
Abstract : The polarization pattern of skylight offers many animals a reference for visual compass orientation. In those cases when this optical compass is identified, the receptors involved are often confined to a small part of an eye built predominantly for other visual tasks. READ MORE
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2. Neurons against Noise : Neural adaptations for dim light vision in hawkmoths
Abstract : All animals perceive the world through their senses, which form the basis for their decisions and motor actions. However, when these all-important senses reach their limit and cease to provide reliable information, the animal’s survival is threatened. READ MORE
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3. Bird Vision: Spatial acuity and colour discrimination in bright and dim light
Abstract : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. READ MORE
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4. Adaptations for nocturnal vision in insect apposition eyes
Abstract : Due to our own preference for bright light, we tend to forget that many insects are active in very dim light. The reasons for nocturnal activity are most easily seen in tropical areas of the world, where animals face severe competition for food and nocturnal insects are able to forage in a climate of reduced competition and predation. READ MORE
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5. Diversity and Limits of Colour Vision in Terrestrial Vertebrates
Abstract : Most terrestrial vertebrates have colour vision, some perceive a less colourful world and others actually discriminate a wider colour spectrum than humans do. Still, we can all make use of the valuable colour information, which is more rigid than just brightness. READ MORE