Supplementary Methods and Results from Visual adaptation and microhabitat choice in Lake Victoria cichlid fish

1.Supplementary Methods: fish groups used for preference trials (Table S1); normalized light conditions at Python Islands and in the laboratory (Figure S1); experimental tank with the two light environments (Figure S2); estimated proportion of incident light captured by the three main photopigments of Pundamilia (Figure S3). 2.Supplementary Results: fitted model for shallow light preference (Tables S2), preference for the rearing environment (Table S3) and preference strength (Table S4); analysis in 15-minute blocks (Figure S5), and correlations between fish activity and preference (Figure S6).