6] eggs in 5 mo, and, due to high fertilization rates, a similar amount of endotrophic larvae is expected.
Fatty acid nutritional quality of sea urchin Paracentrotus lividus (Lamarck 1816) eggs and endotrophic larvae: relevance for feeding of marine larval fish.
The larval esophagus and intestine regressed in turn, and the larva then entered an endotrophic period, being deprived of both mouth and anus.
The brief endotrophic period during the first days following fertilization and the faster development of the feeding organs during this time also occurs in other echinoderms (McEdward, 1984; Chia and Walker, 1991; Pearse and Cameron, 1991).
In echinoids the perimetamorphic period starts at larval competence, includes metamorphosis and the endotrophic postlarval development, and stops at the acquisition of juvenile exotrophy.