Differences in Response Kinetics and Absolute Sensitivity between Red-, Blue- and Ultraviolet-Sensitive Cones of the Tiger Salamander

  • R. J. Perry
  • A. J. Craig
  • P. A. McNaughton
Part of the NATO ASI Series book series (NSSA, volume 194)


Three cone types have been identified in the retina of the tiger salamander, using the suction electrode technique. Their spectral sensitivity functions peak at 605nm (“red-sensitive” cone), 440nm (“blue-sensitive” cone) and below 400nm (“ultraviolet-sensitive” cone). The estimated absolute sensitivity of red-sensitive cones is 3.7 fA photons−1 μm2 and of blue-sensitive cones is 41.9 fA photons −1 μm2. The time-to-peak and the overall duration of the current response to a dim flash are longer in blue-sensitive cones than in red- or ultraviolet-sensitive cones.


Spectral Sensitivity Visual Pigment Cone Type Absolute Sensitivity Tiger Salamander 
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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • R. J. Perry
    • 1
  • A. J. Craig
    • 1
  • P. A. McNaughton
    • 1
  1. 1.Physiological LaboratoryUniversity of CambridgeCambridgeUK

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