Variance explained in benthic variables by herbivorous fish in American Samoa.

Model selection results showing the top-ranked models (in bold) of fish biomass and benthic cover in American Samoa. All models contained depth and the functional groups below as fixed effects, in addition to island as a random effect. Null and models with all herbivores and total fish biomass (all herbivore plus all non-herbivore biomass) are also reported. AICc = Akaike information criterion corrected for small sample size, edf = estimated degrees of freedom, dAICc = the difference in AICc relative to the best model, wi = Akaike weight for the set of candidate models, B = browsers, G = grazers/detritivores, L = large excavators/bio-eroders, S = scrapers/small excavators, All herbivores = biomass of all herbivorous fishes, All non-herbivores = total fish biomass.