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  E-mail Message: I thought you might be interested in this item at http://www.worldcat.org/oclc/116143363 Title: Phototactic responses of anuran amphibians to monochromatic stimuli of equal quantum intensity. Publisher: ISBN/ISSN: 0003-3472 OCLC:116143363

  
  

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Phototactic responses of anuran amphibians to monochromatic stimuli of equal quantum intensity.

Author:	JP Hailman; RG Jaeger
Edition/Format:	Article : English
Publication:	Animal behaviour, 1978 Feb; 26(1): 274-81
Database:	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Summary:	The phototactic responses of anuran amphibians to narrow-band monochromatic stimuli of equal quantum intensity were measured for the first time in eight new experiments. The unimodal spectral response, obtained from dark-adapted American toads (Bufo americanus), peaks near 626 THz of frequency (480 nm wavelength). The bimodal, U-shaped spectral response, obtained from dark-adapted tailed frogs (Ascaphus truei), has the anti-mode at about 589 THz (510 nm) and is not merely the spectral mirror-image of the unimodal response. Absolute level of the spectral stimuli of equal quantum intensity did not affect the spectral response of dark-adapted toads, but light-adaptation enhanced a component that has the same spectral peak as the visual pigment absorption spectrum of principal and single cones of the frog's retina.  Read more...
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