Experimental treatments testing the predation effects of two intertidal crab species on Crassostrea virginica.

†Indicates no cage.Treatment codes shown: +/− indicates species inclusion/exclusion; Blue crab C. sapidus; Mud crab P. herbstii; Control − uncaged treatment. Crab species were included at densities typical of the region (C. sapidus - 1 per cage; P. herbstii – 4 per cage) (A.M. Knights, pers. obs. and [32]).