Sur la presence en Mediterranee de la race epitoque de perinereis cultrifera [Polychetes]

ABSTRACT

The reproduction of Nereid Perinereis cultrifera in the English Channel and the Atlantic is of an epitokous type. The same Nereid in the Mediterranean [Bay of Alger] has been described as atokous [Marcel, 1962] and since that tune epitoky in Mediterranean specimens has been considered to be an accidental phenomenon. However, in the present study polychaetes collected at Salambo [near Tunis] show that those P. cultrifera reproduce exclusively by epitoky