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Figure 2


Fig. 2. Group mean {lambda}max ± 2 s.e.m. of rods, middle-wavelength-sensitive (MWS) and long-wavelength-sensitive (LWS) cones from control and treatment groups for Experiments III–V (plotted in numerical order from left to right). Absorbance spectra of individual photoreceptors from the dorsal retina of coho salmon (Oncorhynchus kisutch, Walbaum) were measured using MSP. The group mean {lambda}max is based on the mean of all fish sampled for that group, and the mean {lambda}max for each fish is the mean of ~20 rods, 10 MWS or 8 LWS cones (on average). The control and TH-treated group mean {lambda}max values for rods, MWS and LWS cones were significantly different from one another (P<0.001) in all three experiments.