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2014 | 59 | 4 |
Tytuł artykułu

Total mercury and selenium concentrations in Sarpa salpa and Balistes capriscus and in their respective Digenean endoparasites Robphildollfusium fractum and Neoapocreadium chabaudi from Tunisia

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The present study reports the levels of mercury and selenium in Sarpa salpa and Balistes capriscus collected along the coast of Mahdia and Sfax (Tunisia). The systems constituted by S. salpa and Robphildollfusium fractum and by B. capriscus and Neoapocreadium chabaudi were tested as potential bioindicators to monitor environmental Hg pollution in marine ecosystems. Mercury and selenium concentrations were assessed in kidney, liver and muscle of 51 S. salpa and of 45 B. capriscus as well as in their respective endoparasites R. fractum and N. chabaudi. The Se:Hg molar ratios were evaluated for both species across the study areas. Surprisingly, the Se:Hg molar ratio in B. capriscus muscle from Mahdia is significantly lower than in Sfax. Our results indicate that some parasites may also be implicated in the amount of Se and Hg available in tissues and therefore contribute to oscillations of the Se:Hg molar ratios. In the model involving the carnivorous species (B. capriscus), the 5.1-times higher levels of mercury in N. chabaudi than in B. capriscus muscle in Sfax enable this fluke to be a sensitive biomonitoring tool for Hg pollution. The present results confirm that the habitual consumption of S. salpa should not suppose any potential health risk for Tunisian people. On the other hand, the consumption of B. capriscus may be of concern and further monitoring is advisable, since the Hg average concentration in Mahdia was above the maximum allowed Hg concentration in the edible portion of fish fixed by the European Union.
Wydawca
-
Czasopismo
Rocznik
Tom
59
Numer
4
Opis fizyczny
p.580-585,ref.
Twórcy
autor
  • Departament de Microbiologia i Parasitologia Sanitaries, Facultat de Farmacia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028 Barcelona, Spain
autor
  • Laboratoire de Biodiversite et Ecosystemes Aquatiques, Departement des Sciences de la Vie, Faculte des Sciences de Sfax, 3000 Sfax, Tunisia
autor
  • Departamento de Biologia, Universidade de Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal
autor
  • Laboratoire de Biodiversite et Ecosystemes Aquatiques, Departement des Sciences de la Vie, Faculte des Sciences de Sfax, 3000 Sfax, Tunisia
autor
  • Departament de Microbiologia i Parasitologia Sanitaries, Facultat de Farmacia, Universitat de Barcelona, Av. Joan XXIII, sn, 08028 Barcelona, Spain
Bibliografia
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Bibliografia
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