Acknowledgements
The authors are grateful to Coordenaç~ao de Aperfeiçoamento de Pessoal de Nível Superior (process n BEX 12866121) and CNPQ for scholarships awarded to A.V.Z. and M.M.S. The authors thank th DGICYT (Project No. CTQ2010-15377) and the Grup de Recerca Consolidat (Project No. SGR2009-1188) for financial help received in support of this study. The authors are grateful to Josep Calderon from the Public Health Agency Laboratory, Barcelona, (ASPB) and to Maria Aparecida B. Espírito Santo and Isabel C. F. Damin from LANAGRO (RS, Brazil) for their kind donation of the seafood samples.