First reported case of yessotoxins in mussels in the Galician Rias during a bloom of Lingulodinium polyedra stein (dodge)
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AuthorsArévalo, F. (Fabiola); Pazos, Y. (Yolanda); Correa, J. (Jorge); Salgado, C. (Covadonga); Moroño, Á. (Ángeles); Paz, B. (Beatriz); Franco, J.M. (José Mariano)
During the summer of 2003, a red tide caused by Lingulodinium polyedrum was detected in the Ría de Ares-Betanzos (NW, Spain) in the oceanographic stations that are monitored weekly. The area, which is dedicated to the intensive culture of mussels (Mytilus galloprovincialis Lmk) in rafts, had already been closed by lipophilic toxins as a result of a previous outbreak of Dinophysis acuminata. LC-MS analyses of mussel samples revealed the presence of yessotoxins (YTX) and okadaic acid (OA). YTX and OA were quantified on mussels by HPLC-FD ranging between 0.9- 1.3 and 1.1-2.9 μg·g-1 of digestive gland, respectively. YTX and Homo-YTX were also detected in net haul samples by LC-MS but they were below the HPLC-FD quantifiable limits. This is the first reported detection of YTX's in shellfish in the Iberian Peninsula.
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