| Contrast sensitivity in a harbor seal (Phoca vitulina). | |
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MedLine Citation:
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PMID: 20981455 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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In this study, the contrast sensitivity function (CSF) of one harbor seal was determined behaviorally in a go-/no-go-experiment at an ambient light of 0.9 lx in air. Contrast sensitivity was assessed as the reciprocal value of the threshold contrast for spatial frequencies varying between 0.03 and 1.5 cycles/deg, which were displayed with contrast ranging from 0.02 to 1 on a TFT monitor with a mean luminance of 3.8 cd/m². The CSF of the harbor seal shows the general characteristics described for other species with a peak at an intermediate frequency, a low frequency roll-off and a high frequency cut-off towards the harbor seal's resolution limit determined in a previous study. The position of the CSF's peak lies at approximately 0.5 cycles/deg and adopts an absolute height of 40. These results compare well with the cat's CSF assessed at a comparable adaptation light which might reflect similarities in lifestyle and optics. |
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Authors:
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Frederike D Hanke; Christine Scholtyssek; Wolf Hanke; Guido Dehnhardt |
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Publication Detail:
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Type: Journal Article Date: 2010-10-28 |
Journal Detail:
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Title: Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology Volume: 197 ISSN: 1432-1351 ISO Abbreviation: J. Comp. Physiol. A Neuroethol. Sens. Neural. Behav. Physiol. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101141792 Medline TA: J Comp Physiol A Neuroethol Sens Neural Behav Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 203-10 Citation Subset: IM |
Affiliation:
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Institute for Biosciences, Sensory and Cognitive Ecology, University of Rostock, Albert-Einstein-Strasse 3, 18059, Rostock, Germany, frhanke@yahoo.de. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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