Larviphagy in native bivalves and an introduced oyster

Introduced Pacific oysters Crassostrea gigas have expanded rapidly in the Dutch Oosterschelde estuary, while stocks of native bivalves declined slightly. As a consequence, total filtration pressure increased significantly, which may affect the mortality of bivalve larvae. Better escape abilities in...

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Bibliographic Details
Published in:Journal of Sea Research
Main Authors: Troost, Karin, Kamermans, Pauline, Wolff, Wim J.
Format: Article in Journal/Newspaper
Language:English
Published: 2008
Subjects:
Adult-Larvae Interactions
Filtration Rates
Ingestion
Predation
Suspension Feeding
Veliger Larvae
SUSPENSION-FEEDING BIVALVES
MYTILUS-EDULIS-L
MARINE INVERTEBRATE LARVAE
CRASSOSTREA-GIGAS
OXYGEN-CONSUMPTION
CERASTODERMA-EDULE
SWIMMING BEHAVIOR
PACIFIC OYSTER
MUSSEL LARVAE
Pacific
Crassostrea gigas
Pacific oyster
Online Access:https://hdl.handle.net/11370/58f5a468-f682-40d9-a4c8-5caace16c328
https://research.rug.nl/en/publications/58f5a468-f682-40d9-a4c8-5caace16c328
https://doi.org/10.1016/j.seares.2008.04.006
Description
Summary:Introduced Pacific oysters Crassostrea gigas have expanded rapidly in the Dutch Oosterschelde estuary, while stocks of native bivalves declined slightly. As a consequence, total filtration pressure increased significantly, which may affect the mortality of bivalve larvae. Better escape abilities in Pacific oyster larvae might be a contributing factor to their rapid geographic expansion. To study whether C gigas larvae are filtered less than larvae of native bivalves, we investigated filtration and ingestion of the larvae of the native Mytilus edulis and introduced C. gigas by the adults of C gigas and M. edulis as well as the native Cerastoderma edule. We measured filtration rates of C gigas and M. edulis larvae by the adult bivalves (C gigas, M. edulis and C. edule), and compared these to filtration rates of algae. Additionally, we studied the fate of filtered larvae. All three adult species filtered both C gigas and M. edulis larvae. M. edulis larvae were filtered by all three bivalve species with the same filtration rates as algae, whereas filtration rates of C gigas larvae were roughly 50% lower than filtration rates of algae. This suggests that C. gigas larvae can somehow reduce their filtration risk, whereas larvae of M. edulis cannot. The majority of filtered C. gigas and M. edulis larvae were ingested. (C) 2008 Elsevier B.V. All rights reserved.

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