Fig. 7.

Spectral sensitivity of juvenile rainbow trout under different light-adapting backgrounds derived from electrical recordings of the ONR. A–H: relative spectral sensitivity of ON and OFF responses under UV + short (UV + S; A and B), middle (M; C and D), M + long (M + L; E and F), and L (G and H) cone mechanism(s) isolation. The λ range of the 4 visual pigments (UV, S, M, and L), present in the retina of juvenile rainbow trout of this size, is indicated at the bottom of H. Each point is the mean ± SD of n = 5 (A, B, G, and H) and n = 3 (C–F). Adapted, with permission, from Beaudet (1997).