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Test diameter (mm) of juvenile sea urchins, Lytechinus variegatus, fed one of three semi-purified, formulated diets (190, 260, or 380 g kg-1 carbohydrate and 310 g kg-1 protein). Values represent means ± SEM (N = 16 sea urchins treatment-1). Test diameter was significantly higher in those fed 190 g kg-1 carbohydrate than fed 380 g kg-1 carbohydrate (P < 0.05), but not different from those fed 260 g kg-1 carbohydrate (P > 0.05).
