| Photosensitivity to different light intensities in blind and sighted rodents. | |
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MedLine Citation:
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PMID: 19915128 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Photoperiod is an important cue regulating biological rhythms in mammals, including 'blind' subterranean and sighted fossorial rodent species. These species may respond differentially to changes in light quality according to their retinal complexity. The effects of increasing light intensity on daily rhythms of urine excretion and urinary output of 6-sulfatoxymelatonin levels were compared in 'blind' mole rats Spalax ehrenbergi and sighted social voles, Microtus socialis. Our results show that the threshold irradiance required to entrain rhythms of voles is three magnitudes greater than that for mole rats. The results suggest that mole rats have an operational photoreceptive pathway with a lower threshold irradiance than voles. Such a low threshold reflects the remarkable capability of this 'blind' species to utilize light signals even under challenging light conditions. |
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Authors:
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A E Zubidat; R J Nelson; A Haim |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of experimental biology Volume: 212 ISSN: 1477-9145 ISO Abbreviation: J. Exp. Biol. Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-11-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 3857-64 Citation Subset: IM |
Affiliation:
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Department of Evolution and Environmental Biology, University of Haifa, Haifa 31905, Israel. zubidat3@013.net.il |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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