| Photic induction of locomotor activity is correlated with photic habitat in Anolis lizards. | |
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MedLine Citation:
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PMID: 22089083 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A variety of ecologically important behaviors, including circadian rhythms and seasonal reproduction, are influenced by non-visual responses to light, yet very little is known about the relationship between photic habitat and non-visual photoreception. Puerto Rican Anolis lizards have diverged into multiple photic niches, making them a good model for non-visual photosensory ecology. We investigated the photic induction of locomotor activity, a non-visual response to light, in four species of Anolis comprising two pairs of closely related, ecomorphologically similar species whose microhabitats differ in solar irradiance. We developed a device for continuous, automated detection and recording of anole locomotor activity, and used it to characterize activity under 12:12 h light-dark cycles. Next, we administered a series of 2-h light pulses during the dark period of the light-dark cycle and measured the increase in locomotor activity relative to baseline dark activity. Five different irradiances (ranging from very dim to daytime levels) were given to each individual lizard on separate nights. As expected, light caused an irradiance-dependent increase in locomotor activity in all four species. The responses at the highest irradiances were significantly greater in species occupying relatively more shaded habitats, suggesting that non-visual photoreception may be adapted to habitat light in Anolis lizards. |
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Authors:
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Ashli F Moore; Masashi Kawasaki; Michael Menaker |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-17 |
Journal Detail:
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Title: Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology Volume: - ISSN: 1432-1351 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-17 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: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Biology, University of Virginia, PO Box 400328, Charlottesville, VA, 22904-4328, USA. |
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