Morphometric relationships and annual gonad index of the edible Sea urchin <i>Paracentrotus lividus</i> from North Western Sardinia = Relazioni morfometriche e indice gonadico annuale del riccio di mare commestibile <i>Paracentrotus lividus</i> nel nord ovest Sardegna

Abstract

Weight/diameter, weight/height and height/diameter morphometric relationships were calculated for a shallow rocky Paracentrotus lividus population sampled monthly near Alghero (Italy) from November 2004 to October 2005. Gonad index (GI) of the sea urchins was also evaluated. Statistical analyses showed significant differences of GI between 2 distinct periods of the year: late fall-winter and spring-late summer