From water to edible fish. Transfer of metals and metalloids in the SanRoque Reservoir (Córdoba, Argentina). Implications associated withfish consumption

MAGDALENA MONFERRAN; PAOLA GARNERO; MARIA DE LOS ANGELES BISTONI; ARIEL ANBAR; GWYNETH GORDON; DANIEL WUNDERLIN

ECOLOGICAL INDICATORS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2015 vol. 63 p. 48 - 48

1470-160X

he concentration of Mn, Fe, Zn, Cu, Cd, Cr, Ni, Ag, Mo, Nd, Al, Ce, As, Sr, Pb, Pt and Hg was analysedin water, sediments, and aquatic organisms from the San Roque Reservoir (Córdoba-Argentina), sam-pled during the wet and dry season, to evaluate their transfer through the food web. Stable nitrogen(15N) isotopes were used to investigate trophic interactions. According to this, samples were dividedinto three trophic groups: plankton, shrimp (Palaemonetes argentinus) and fish (Silverside, Odontesthesbonariensis). Liver and gills are the main heavy metal storage tissues in fish. Hg and As concentrationsin the muscle of O. bonariensis exceed the Oral Reference doses for metals established by USEPA (2009).Trophic magnification factors (TMFs) for each element were determined from the slope of the regressionbetween trace element concentrations and 15N. Calculated TMFs showed fundamental differences inthe trophodynamics of the studied elements during the wet and dry season in the San Roque Re