2D plot of the principal component analysis for repletion
index, gonadosomatic (gonad) index and calcified Rhodophyta
of the gut contents pooled per seasons in the sea urchins studied.
(CRha) calcified Rhodophyta-autumn; (CRhs) calcified
Rhodophyta-summer; (CRhsp) calcified Rhodophyta-spring;
(CRhw) calcified Rhodophyta-winter; (GIa) gonad index-autumn;
(GIs) gonad index-summer; (GIsp) gonad index-spring;
(GIw) gonad index-winter; (RIa) repletion index-autumn; (RIs)
repletion index-summer; (RIsp) repletion index-spring; (RIw)
repletion index-winter.