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  • 1
    Electronic Resource
    Electronic Resource
    Electrophysiological measurements of spectral mechanisms in the retinas of two cervids: white-tailed deer (Odocoileus virginianus) and fallow deer (Dama dama) (1994)
    Springer
    Journal of comparative physiology 174 (1994), S. 551-557 
    Details
    ISSN: 1432-1351
    Keywords: Cone photopigments ; Ungulate ; Deer ; Electroretinogram ; Dichromacy ; Odocoileus virginianus ; Dama dama
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Electroretinogram (ERG) flicker photometry was used to study the spectral mechanisms in the retinas of white-tailed deer (Odocoileus virginianus) and fallow deer (Dama dama). In addition to having a rod pigment with maximum sensitivity (λmax) of about 497 nm, both species appear to have two classes of photopic receptors. They share in common a short-wavelength-sensitive cone mechanism having λmax in the region of 450–460 nm. Each also has a cone having peak sensitivity in the middle wavelengths, but these differ slightly for the two species. In white-tailed deer the λmax of this cone is about 537 nm; for the fallow deer the average λmax value for this mechanism was 542 nm. Deer resemble other ungulates and many other types of mammal in having two classes of cone pigment and, thus, the requisite retinal basis for dichromatic color vision.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217375
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cone monochromacy and a reversed Purkinje shift in the gerbil (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 317-319 
    Details
    ISSN: 1420-9071
    Keywords: Gerbil ; Meriones unguiculatus ; photopigment spectra ; cone monochromacy ; Purkinje shift
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Retinal spectral sensitivity of the gerbil (Meriones unguiculatus) shows that this animal has a unique photoreceptor complement: there is only a single class of cone and the spectrum for these receptors is peak shifted toward the short wavelengths relative to the spectra obtained from rods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01957461
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Spectral sensitivity of cat cones to rapid flicker (1986)
    Springer
    Experimental brain research 62 (1986), S. 446-448 
    Details
    ISSN: 1432-1106
    Keywords: Cat cones ; Spectral mechanisms ; Flicker photometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Records obtained from the flicker photometric electroretinogram indicate that only a single spectral mechanism (λMAX = 555 nm) in the cat eye contributes to the response to 50 Hz flicker. A photopic mechanism (λMAX = 500–510 nm) detected in earlier studies does not respond to high frequency flicker.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238865
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Development of spectral mechanisms in the ground squirrel retina following lid opening (1984)
    Springer
    Experimental brain research 55 (1984), S. 507-514 
    Details
    ISSN: 1432-1106
    Keywords: Visual development ; Ground squirrel ; Electroretinogram ; Spectral mechanisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The retina of the California ground squirrel (Spermophilus beecheyi) contains three classes of photopigments (λmax = 440, 500, 525 nm). From optic nerve recordings it was previously discovered that the effectiveness of signals from the 440 nm cone increase gradually over the weeks following lid opening. In this experiment several features of the electroretinogram (ERG) were examined to assess developmental changes in signals originating in the outer retina. As judged by threshold sensitivity, suprathreshold responsivity, or adaptability, the contribution of the 525 nm mechanism reaches its adult level two to three weeks after lid opening. The 500 nm mechanism appears to have a similar developental time course. The development of the 440 nm mechanism was tracked using a chromatic adaptation measure. So indexed, the time required for this mechanism to reach its adult status was much greater than that for the other two mechanisms (70–80 days vs 40–45 days of age). The relatively slow development of effectiveness of the 440 spectral mechanism appears to reflect events occurring in the outer retina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00235281
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    Paper (German National Licenses)
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