Figure 2.

Residuals of (a) eye volume and (b) total AM mass on HL are shown for different trophic categories. The four categories displayed for each trait are P, piscivores; A, algivores; I, insectivores; and Pk, planktivores. Each category included here had more than five species and species names are given in table 1. Piscivores tended to have small eyes and larger AMs when compared with planktivores that exhibit larger eyes and somewhat smaller AMs although the variation makes comparative conclusions difficult. The variation in each diet category is substantial and no statistics are done on the data shown because there is no enough power to test these patterns with phylogenetically controlled tests.