Data/hora: 07/06/2024 06:55:35

Provedor de dados: | 5
País: | France
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
Autores: | Haberkorn, Hansy; Tran, Damien; Massabuau, Jean-charles; Ciret, Pierre; Savar, Veronique; Soudant, Philippe.
Data: | 2011-06
Ano: | 2011
Palavras-chave: | Harmful algae; Oysters; Behavioral responses; Algae concentration; Toxin accumulation.
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 &lt; 0.05) with increasing [A.m.](w) but not at 5 x 10(3) cells ml(-1) (p &gt; 0.05). The frequency of microclosures specifically increased with [A.m.](w) (p &lt; 0.05) and the opening duration with [PSP](dg) (p &lt; 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.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00041/15195/12617.pdf

DOI:10.1016/j.marpolbul.2011.03.034

Editor: | Pergamon-elsevier Science Ltd
Relação: | http://archimer.ifremer.fr/doc/00041/15195/
Formato: | application/pdf
Fonte: | Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2011-06 , Vol. 62 , N. 6 , P. 1191-1197
Fonte: | 2011 Elsevier Ltd All rights reserved.