Abstract
Oocyte maturation and emission, planktonic stages and recruitment of juveniles for Nephtys hombergii (Annelida:Polychaeta, Nephtyidae) were studied in several locations of Arcachon Bay, France. At each station, several oocyte emissions could be distinguished, even though they were not synchronized. The decrease in size of oocytes may involve oocyte resorption rather than an actual emission of gametes. Accordingly, two larval cohorts were observed which could be linked to oocyte emission. Post-larvae settled directly in the intertidal area and again two distinct waves of recruitment were observed. It is concluded that in Arcachon Bay Nephtys hombergii, despite a continuous presence of oocytes during breeding, showed a discontinuity of emission.
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