期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：s
页码：4634-4641
出版社：University of Mohammed Premier Oujda
摘要：This study of Gymnodinium catenatum was conducted across two sampling stations; M'diqbay and Oued Laou estuary during the period from July 2007 to May 2009. Gymnodiniumcatenatum blooms occurred after a rainfall event in autumn and early winter. Staticallyanalyses showed a positive correlation with rainfall. During January 2008, the G.catenatum bloom resulted in contamination of tuberculate cockles and sweet clam byParalytic Shellfish Poisoning (PSP) toxins. In the Oued Laou estuary, the levels of thesetoxins in shellfish went beyond the normative threshold for consumption of shellfish, (80μg SXTeq. /100g of meat) and reached (710 ± 82.07) and (198 ± 6.56) μg SXTeq. /100g ofmeat in cockles and sweet clam respectively. In M'diq bay, concentrations of PSP toxins inthe meat of these two shellfish were lower (256.57 ± 12.22 μg SXTeq. /100g and 80.66 ±8.14 μg SXTeq. /100g of meat in tuberculate cockles and sweet clam respectively. Anexperimental test of depuration of tuberculate cockles and sweet clam contaminated by thePSP toxins was conducted in laboratory conditions in the first week of January 2008. Theresults showed partial and progressive elimination of PSP toxins in two shellfish speciesover time. In the tuberculate cockle, the elimination of PSP appears to be slower comparedwith the sweet clam; it took 120 days to reach levels of 80 μg SXTeq. /100g of meat, onthe other hand only 3 days were needed to reach this safe concentration in the sweet clam.
