Absolute visual threshold and scotopic spectral sensitivity in the tawny owl Strix aluco

@article{Martin1977AbsoluteVT,
  title={Absolute visual threshold and scotopic spectral sensitivity in the tawny owl Strix aluco},
  author={Graham R. Martin},
  journal={Nature},
  year={1977},
  volume={268},
  pages={636-638}
}
  • G. Martin
  • Published 18 August 1977
  • Biology, Medicine
  • Nature
IT has long been assumed from considerations of the behaviour of owls that the vision of these species is much more sensitive than that of man. Experimental determinations of the absolute visual sensitivity of these birds have provided evidence in support of this view, suggesting that visual sensitivity in owls is of the order of 10 to 100 times (+1.0 log10 to +2.0 log10 units) that of man1,2. Owing to calibration problems, however, these values were probably inaccurate by at least a factor of… Expand
Sensory capacities and the nocturnal habit of owls (Strigiformes)
Behavioural studies show that in the eye of the Tawny Owl Strix aluco both absolute visual sensitivity and maximum spatial resolution at low light levels are close to the theoretical limit dictatedExpand
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  • Journal of comparative physiology
  • 2004
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The schematic eye ofrix aluco, a nocturnal owl species, is described and it is concluded that the essentially ‘nocturnal’ feature of the owl eye does not lie in either its light gathering power or the sensitivity of individual rod receptors. Expand
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In conclusion, eye shape and retinal topography in owls vary among species and this variation is associated with different activity patterns and habitat preferences, thereby supporting similar observations in other vertebrates. Expand
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  • Medicine, Physics
  • Vision Research
  • 1984
TLDR
The uniocular retinal field of Strix aluco is highly asymmetrical and the significance of the owl eye's tubular shape, its nasad asymmetry, and the possible factors influencing binocular field width are discussed. Expand
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What is presently known about the eyes as well as the visual abilities of these birds, and what is known about visual pathways, are summarized. Expand
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Orientation based saliency was demonstrated in a visual-search experiment, and higher cognitive abilities were shown when the owl’s were able to use illusory contours for object discrimination. Expand
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The anatomy of bird eyes has often been described in near eulogistic terms. Polyak (1957, p. 852), for example, reported that the eyes of swallows (Hirundo rustica) exhibit “extraordinaryExpand
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The Visual Ecology of Avian Photoreceptors
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  • Medicine, Biology
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TLDR
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This chapter describes how birds acquire visual information, and in particular general principles in physiological optics, and image coding by the photoreceptors, and the way in which signals from the different types of photoreceptor are used in visual behavior. Expand
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