| Polarization sensitivity and retinal topography of the striped pyjama squid (Sepioloidea lineolata - Quoy/Gaimard 1832). | |
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MedLine Citation:
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PMID: 20833931 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Coleoid cephalopods (octopus, cuttlefish and squid) potentially possess polarization sensitivity (PS) based on photoreceptor structure, but this idea has rarely been tested behaviourally. Here, we use a polarized, striped optokinetic stimulus to demonstrate PS in the striped pyjama squid, Sepioloidea lineolata. This species displayed strong, consistent optokinetic nystagmic eye movements in response to a drum with stripes producing e-vectors set to 0 deg, 45 deg, 90 deg and 135 deg that would only be visible to an animal with PS. This is the first behavioural demonstration of a polarized optokinetic response in any species of cephalopod. This species, which typically sits beneath the substrate surface looking upwards for potential predators and prey, possesses a dorsally shifted horizontal pupil slit. Accordingly, it was found to possess a horizontal strip of high-density photoreceptors shifted ventrally in the retina, suggesting modifications such as a change in sensitivity or resolution to the dorsal visual field. |
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Authors:
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Christopher M Talbot; Justin Marshall |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of experimental biology Volume: 213 ISSN: 1477-9145 ISO Abbreviation: J. Exp. Biol. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-13 Completed Date: 2011-01-12 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: 3371-7 Citation Subset: IM |
Affiliation:
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The Sensory Neurobiology Group, Queensland Brain Institute, and the School of Biomedical Sciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia. chris.talbot@uq.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Decapodiformes / anatomy & histology, physiology* Eye Movements / physiology Nystagmus, Optokinetic / physiology Photic Stimulation Photoreceptor Cells, Invertebrate / cytology, physiology Retina / anatomy & histology, physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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