Are introduced oysters (Crassostrea gigas) hampering the recruitment of indigenous bivalve filter feeders? ...

• Main Authors: Troost, Karin, Kamermans, Pauline, Stamhuis, Eize J., Wolff, Wim J.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2004 - K - Theme session 2024
• Subjects: Fisheries and aquaculture; Technologies and data; The sea and human culture and societies; Crassostrea gigas
• Online Access: https://dx.doi.org/10.17895/ices.pub.25349386; https://ices-library.figshare.com/articles/conference_contribution/Are_introduced_oysters_Crassostrea_gigas_hampering_the_recruitment_of_indigenous_bivalve_filter_feeders_/25349386

No abstracts are to be cited without prior reference to the author.Since their first introduction in 1964, Japanese oysters (Crassostrea gigas) are spreading rapidly throughout Dutch estuaries. They may affect Dutch ecosystems profoundly. One way in which they might affect indigenous filter-feeding bivalves is by filtering their pelagic larvae, thereby hampering their recruitment. We studied the ability of adult oysters to filter bivalve veliger larvae of different species. Inhalant feeding current velocities of Japanese oysters and blue mussels (Mytilus edulis) were assessed using Digital Particle Image Velocimetry. These velocities were compared with average swimming speeds of bivalve veligers from literature. Inhalant feeding current velocities of both oysters and mussels were higher than swimming speeds of bivalve veligers, indicating that both species might be able to filter large amounts of veliger larvae. However, fluid deformation rate profiles revealed inhalant oyster feeding currents to be more ...