Bijdrage tot de kennis der mariene fauna van de Belgische kust (III). Waarnemingen aangaande het voorkomen, de voortplanting, de settling en de groei van Crepidula fornicata (L.)

1. For the first time, Crepidula fornicata was observed in Belgium on 28-9-1911; in 1959, it became an oyster pest. 2. It was first introduced into Belgium with seed oysters from Great Britain. Later on, with seed oysters from the Netherlands. 3. Probably, the geographical spreading is caused by the adult animals attached to oysters. Larval propagation is responsible for local extension. 4. In the sluice-dock at Ostend, larvae occur from the middle of May till the end of November; they swim freely for a period of about 12 days. The first massive emission of larvae is observed during May and Ju... Mehr ...