Relationship between valve activity, microalgae concentration in the water and toxin accumulation in the digestive gland of the Pacific oyster Crassostrea gigas exposed to Alexandrium minutum
Type | Article | ||||||||||||
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Date | 2011-06 | ||||||||||||
Language | English | ||||||||||||
Author(s) | Haberkorn Hansy1, Tran Damien2, Massabuau Jean-Charles2, Ciret Pierre2, Savar Veronique3, Soudant Philippe1 | ||||||||||||
Affiliation(s) | 1 : Univ Bretagne Occidentale, Lab Sci Environm Marin, Inst Univ Europeen Mer, F-29280 Plouzane, France 2 : Univ Bordeaux 1, CNRS, UMR EPOC 5805, F-33120 Arcachon, France 3 : IFREMER Ctr Nantes, Lab Phycotoxines, F-44311 Nantes, France |
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Source | Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2011-06 , Vol. 62 , N. 6 , P. 1191-1197 | ||||||||||||
DOI | 10.1016/j.marpolbul.2011.03.034 | ||||||||||||
WOS© Times Cited | 38 | ||||||||||||
Keyword(s) | Harmful algae, Oysters, Behavioral responses, Algae concentration, Toxin accumulation | ||||||||||||
Abstract | The complexity of the relationships between Alexandrium minutum (Am.) concentration in the water ([A.m.](w)), Paralytic Shellfish Poisoning contamination in the digestive gland ([PSP](dg)) and valve behavior was explored in oysters Crassostrea gigas. Two experiments were conducted, during which oysters' valve behaviour were analyzed. Oysters, first acclimated for 10-days with the non harmful microalgae Heterocapsa triquetra (H.t.), were exposed to four microalgae mixtures at constant total concentrations of 10 x 10(3) cells ml(-1) (experiment-1) and 5 x 10(3) cells ml(-1) (experiment-2): 100% Am.; 50% A.m.-50% H.t.; 25% A.m.-75% H.t.; 100% H.t. At the end of experiment-2, [PSP](dg) were measured. At 10 x 103 cells ml(-1), the microalgal ingestion decreased (p < 0.05) with increasing [A.m.](w) but not at 5 x 10(3) cells ml(-1) (p > 0.05). The frequency of microclosures specifically increased with [A.m.](w) (p < 0.05) and the opening duration with [PSP](dg) (p < 0.0001). Oysters exhibiting the maximum increase in opening duration also exhibited the highest [PSP](dg). The results are discussed in terms of oyster physiology and origin of the behavioral response. (C) 2011 Elsevier Ltd. All rights reserved. | ||||||||||||
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