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.