Licht-im-Terrarium: Literaturdatenbank
Licht-im-Terrarium: Literaturdatenbank |
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Jacobs, G. H., Fenwick, J. A., Crognale, M. A., & Deegan, J. F. (1992). The all-cone retina of the garter snake: spectral mechanisms and photopigment. Journal of Comparative Physiology A, 170(6), 701–707. Added by: Sarina (2009-01-21 16:12:40) Last edited by: Sarina (2009-04-06 11:35:30) |
| Resource type: Journal Article DOI: 10.1007/BF00198980 BibTeX citation key: Jacobs1992a View all bibliographic details  |
Categories: Englisch = English Keywords: Schlangen = Snakes, Sehvermögen = Visual Perception Creators: Crognale, Deegan, Fenwick, Jacobs Collection: Journal of Comparative Physiology A |
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| Abstract |
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The retina of the garter snake contains 3 morphologically distinct classes of cone photoreceptor. The spectral mechanisms in the retinas of garter snakes (Thamnophis sirtalis and T. marcianus) were studied by recording a retinal gross potential, the electroretinogram, using a flicker photometric procedure. Spectral sensitivity functions recorded with stimuli presented at high temporal frequency (62.5 Hz) are broadly peaked in the region of 550–570 nm. These functions remain spectrally invariant (a) in the face of significant changes in stimulus pulse rate (8–62.5 Hz), (b) whether the eye is light or dark adapted, and (c) under conditions of intense chromatic adaptation. It is concluded that the garter snake has only a single class of cone pigment. The results from a curve fitting analysis suggests that this pigment has peak absorbance at about 556 nm. Key words Garter snake - Thamnophis - Spectral mechanisms - Cone photopigment - All-cone retina - Electroretinogram Added by: Sarina Last edited by: Sarina |