Data/hora: 07/06/2024 07:23:54

Provedor de dados: 	5	
País: 	France	
Título: 	Dosage par C.L.H.P. des toxines paralysantes de coquillages contaminés par Alexandrium minutum en rivières de Morlaix et de la Penzé en 1994	
Autores: 	Masselin, Pierre; Le Saux, Jean-claude; Le Gal, Dominique; Lassus, Patrick.	
Data: 	1996-07	
Ano: 	1996	
Resumo: 	PSP toxin levels in cultivated mussels and oysters were monitored over a one year period (1994) in two keys areas, the Morlaix and la Penzé estuaries (Northern Brittany, France).Toxins were detected by IP-HPLC and results compared to those given by the bioassay routinely used by IFREMER Coastal Laboratories. Shellfish contamination seems closely related to A. minutum occurences (the minimum concentration of cells resulting in toxin detection in mussels was 400 cells/I). Toxins were depurated rapidly initially, and subsequently at a slower rate, such that residual toxin levels were detected in mussel digestive glands three months later. Maximum toxin levels were lower than the quarantine treshold level in Morlaix river, but exceeded this level (maximum: 290 µg STX eq./100 g meat) in la Penzé river over a 15 day period. This discrepancy is explained by the differing maximum concentrations of A. minutum at each site (1.44 106 cells/l in Morlaix river, 7.98 106 cells/l in la Penzé). During winter no shellfish contamination was recorded, which suggests that potentially toxic resting stages had no effect. GTX2 and GTX3, the two predominant toxins found in A. minutum, were also detected in shellfish meat, with highest concentrations recorded in the digestive glands in inverse proportions to those found in the phytoplankton cells. In contrast with previous experimented results, no saxitoxin (STX) production was observed. Finally, the correlation between HPLC and the mouse test was not good (R2 = 0.59) due to the low toxicity levels in contaminated shellfish and too few samples.	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/00119/23016/20846.pdf	
Relação: 	http://archimer.ifremer.fr/doc/00119/23016/	
Formato: 	application/pdf