Fig. 8.

Latency of the juvenile rainbow trout ON response under different light-adapting backgrounds. A–D: slope b and latency at threshold and for a fixed stimulus of the ON response in the case of UV + S (A), M (B), M + L (C), and L (D) cone mechanism isolation. For clarity, in each graph, a value of 1 and 2 was added to the latency at threshold and slope b normalized means, respectively, to displace them vertically from the normalized latency means for a fixed stimulus. In each graph, statistical difference between slope b means is indicated by a different number. In A and D, groups of latencies at threshold with statistically different means are assigned different numbers (groups 1 and 2). Statistical difference between latencies at threshold for 4 specific λs (380, 420, 520, and 630 nm) represented in all graphs is shown in Table 2. Each point is the mean ± SD of n = 5 (A and D) and n = 3 (B and C). Adapted, with permission, from Beaudet (1997).