Document Detail

Spectral sensitivity of the two-spotted goby Gobiusculus flavescens (Fabricius): a physiological and behavioural study.
MedLine Citation:
PMID:  16709906     Owner:  NLM     Status:  MEDLINE    
Microspectrophotometry of Gobiusculus flavescens photoreceptors revealed a single rod visual pigment (lambdamaxat 508 nm) and the three cone pigments (lambdamax 456, 531 and 553 nm). The cone population was dominated by identical double cones containing the middle-wave-sensitive (MWS) pigment, but with a small number of non-identical MWS/LWS (long-wave-sensitive) and identical LWS double cones. Small populations of large single cones also contained either the MWS or LWS pigment. The short-wave-sensitive (SWS) pigment was found in small single cones. Lens transmission was great reduced below 410 nm. The spectral sensitivity of the behaviourally determined reaction distance (RD) to prey at a high irradiance level (0.5 micromol m-2 s-1) correlated with the maximum sensitivity of the MWS cones, both peaking around 530 nm. However, at a lower irradiance level (0.015 micromol m-2 s-1) such a correlation was not so apparent. The RD was greatly reduced, though still maintaining a peak around 530-550 nm, but with a relatively smaller reduction in RD at shorter wavelengths. Optomotor behaviour displayed a somewhat similar spectral sensitivity to the RD responses at the higher light intensity. However, the peak was at slightly longer wavelengths at 550 nm, suggesting a greater input from LWS cones to the optomotor response.
Anne C Utne-Palm; James K Bowmaker
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  209     ISSN:  0022-0949     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-05-19     Completed Date:  2006-08-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2034-41     Citation Subset:  IM    
Department of Biology, University of Bergen, PO Box 7800, N-5020 Bergen, Norway.
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MeSH Terms
Lens, Crystalline / physiology,  radiation effects
Perciformes / physiology*
Predatory Behavior / physiology*
Retina / physiology*,  radiation effects*
Retinal Pigments / physiology,  radiation effects
Reg. No./Substance:
0/Retinal Pigments

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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