Growth anomalies in Pecten maximus from coastal waters (Bay of Brest, France): relationship with diatom blooms
|Author(s)||Lorrain Anne, Paulet Yves-Marie, Chauvaud Laurent, Savoye Nicolas, Nezan Elisabeth, Guerin Laurent|
|Affiliation(s)||Technopole Brest Iroise, IUEM, UBO, CNRS,UMR 6539, F-29280 Plouzane, France.
IFREMER, F-29900 Concarneau, France.
Technopole Brest Iroise, IUEM, UBO, CNRS,UMR 6554, F-29280 Plouzane, France.
|Source||Journal of the Marine Biological Association of the United Kingdom (0025-3154) (Cambridge University Press), 2000-08 , Vol. 80 , N. 4 , P. 667-673|
|WOS© Times Cited||52|
|Keyword(s)||Biscay bay, Limiting factors, Primary production, Phytoplankton cnoncentration, Pecten maximus, Growth rate|
|Abstract||The aim of this study was to characterize the daily shell growth of Pecten maximus from early 1998 to late spring 1999 in the Bay of Brest with a careful qualitative and quantitative description of the pelagic primary production. Our results, in accordance with previous studies, demonstrate that there are episodic declines in the growth rate. Concurrent events of low growth rate and large bottom-concentrations of algae following diatom blooms (Cerataulina pelagica or Rhizosolenia delicatula), suggests that this high concentration of phytoplankton on the bottom layer may affect food intake or respiratory activity of the scallops by gill clogging or oxygen depletion. In this study, silicic acid or phosphorus are inferred to be limiting factors responsible for the collapse of the spring bloom. Further, we suggest that, in an N-enriched ecosystem, Si or P-limitation and the changing sinking velocities of phytoplankton, could affect the biology of benthic suspension-feeders.|