FN Archimer Export Format
PT J
TI Ecophysiological response of the cupped oyster Crassostrea gigas exposed to the green dinoflagellate Lepidodinium chlorophorum
BT 
AF Roux, Pauline
   García-Corona, José Luis
   Ragueneau, Stacy
   Schapira, Mathilde
   Siano, Raffaele
   Pernet, Fabrice
   Queau, Isabelle
   Malestroit, Pascale
   Tallec, Kevin
   Fleury, Elodie
AS 1:1,2;2:6;3:3,4;4:2;5:5;6:3;7:3;8:5;9:3;10:3;
FF 1:PDG-ODE-LITTORAL-LERMPL;2:;3:;4:PDG-ODE-LITTORAL-LERMPL;5:PDG-ODE-DYNECO-PELAGOS;6:PDG-RBE-PHYTNESS;7:PDG-RBE-PHYTNESS;8:PDG-ODE-DYNECO-PELAGOS;9:PDG-RBE-PFOM-LPI;10:PDG-RBE-PHYTNESS;
C1 Nantes Université, Institut des Substances et Organismes de la Mer, ISOMer, UR 2160, F-44000 Nantes, France
   Ifremer LITTORAL, Rue de l'Ile d'Yeu 44311, Nantes, France
   Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
   Aix Marseille Univ, CNRS, Centrale Marseille, M2P2, Equipe Procédés Membranaires (EPM), Marseille, France
   Ifremer, DYNECO, F-29280 Plouzané, France
   Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
C2 UNIV NANTES, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV AIX MARSEILLE, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
SI NANTES
   BREST
SE PDG-ODE-LITTORAL-LERMPL
   PDG-ODE-DYNECO-PELAGOS
   PDG-RBE-PHYTNESS
   PDG-RBE-PFOM-LPI
UM LEMAR
IN WOS Ifremer UPR
   WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 4.5
TC 0
UR https://archimer.ifremer.fr/doc/00876/98754/108375.pdf
   https://archimer.ifremer.fr/doc/00876/98754/108376.docx
LA English
DT Article
DE ;Harmful algae blooms;Dinoflagellate Lepidodinium chlorophorum;Oysters Crassostrea gigas;Ecophysiological impairment
AB Green seawater discolorations caused by the marine dinoflagellate Lepidodinium chlorophorum are frequently observed during the summer along the southern coast of Brittany, France. Although there is no evidence that L. chlorophorum produces toxins, green seawater discolorations are related to mortalities of filter feeding animals. Here, we investigate the ecophysiological response of the Pacific oyster Crassostrea gigas exposed to L. chlorophorum. Oysters were exposed for 48 h to a low concentration (500 cells mL−1) and a bloom concentration (7500 cells mL−1) of L. chlorophorum and compared to controls fed with the haptophyte Tisochrysis lutea. The direct consequences of L. chlorophorum exposure were assessed through semiquantitative histochemical analysis. Thereafter, a 24 h-recovery phase with a diet based on T. lutea was studied using an individual ecophysiological measurement system. We found that oysters successfully filtered L. chlorophorum cells with increased mucus secretion in all tissues analyzed. Animals previously exposed to a bloom concentration of L. chlorophorum exhibited significantly lower clearance rates shortly after the exposition, probably reflecting the effect of exopolymer particles produced by L. chlorophorum cells, and the subsequent production of mucus in the mantle and gills. However, their absorption efficiency was two-fold higher than control oysters exposed to T. lutea. The increase in absorption efficiency during the recovery phase could be a compensation for a decrease of clearance rate occurred during the exposure phase, interpreted as physiological depletion of C. gigas during green seawater discolorations. For the first time, laboratory experiments showed how high concentrations of L. chlorophorum can affect oyster physiology. 
PY 2024
PD APR
SO Aquaculture
SN 0044-8486
PU Elsevier BV
VL 584
UT 001187663700001
DI 10.1016/j.aquaculture.2024.740644
ID 98754
ER

EF