Journal
CHEMOSPHERE
Volume 208, Issue -, Pages 682-690Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.06.034
Keywords
Aplysia spp.; Food delicacy; Trace elements; Fatty acids; Desaturase; Elongase
Categories
Funding
- National Funds (FCT/MEC, Fundacao para a Ciencia e Tecnologia/Ministerio da Educacao e Ciencia) [UID/QUI/50006/2013]
- European Union (FEDER)
- FCT PhD Programme in Medicines and Pharmaceutical Innovation (i3DU) [PD/BD/113565/2015]
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The profile of essential and non-essential elements was traced in the edible sea hares Aplysia depilans Gmelin, Aplysia fasciata Poiret and Aplysia punctata Cuvier. Manganese (Mn), iron (Fe), zinc (Zn), copper (Cu) and selenium (Se) were identified as the major essential elements. Risk assessment evidenced that the levels of cadmium (Cd) and lead (Pb) did not exceed the maximum limit value established by the European Regulation, the contents of chromium (Cr), nickel (Ni) and arsenic (As) being also below the levels established by the FDA guide. A correlation between trace elements levels and desaturation-elongation indexes of fatty acids was found. While Cd, Se and molybdenum (Mo) seem to promote the desaturation-elongation process involved on the production of C20:4n-6c, Ni, Cr and Fe may potentiate the conversion of C18:3n-3c to C20:5n-3c. Furthermore, cobalt (Co), Ni and Cu appear to decrease Delta 9 desaturation index. Besides the suggested biosynthetic switch modulated by trace elements, the nutritional value of the species is further strengthened. (C) 2018 Elsevier Ltd. All rights reserved.
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