| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
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
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| Autores: |
Haberkorn, Hansy
Tran, Damien
Massabuau, Jean-charles
Ciret, Pierre
Savar, Veronique
Soudant, Philippe
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| Data: |
2011-06
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| Ano: |
2011
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| Palavras-chave: |
Harmful algae
Oysters
Behavioral responses
Algae concentration
Toxin accumulation
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| Resumo: |
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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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00041/15195/12617.pdf
DOI:10.1016/j.marpolbul.2011.03.034
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| Editor: |
Pergamon-elsevier Science Ltd
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| Relação: |
http://archimer.ifremer.fr/doc/00041/15195/
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| Formato: |
application/pdf
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| Fonte: |
Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2011-06 , Vol. 62 , N. 6 , P. 1191-1197
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| Direitos: |
2011 Elsevier Ltd All rights reserved.
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