title: Total mercury levels in commercial fish species from Italian fishery and aquaculture.
abstract: Total mercury levels were measured in 42 commercial fish species caught off the Central Adriatic and Tyrrhenian coasts of Italy and in 6 aquaculture species. The study on wild fish covered species differing in living habitat and trophic level. The study on farmed fish covered marine and freshwater species from intensive and extensive aquaculture and their feed. Mercury levels were analysed by thermal decomposition-amalgamation-atomic absorption spectrophotometry. Total mercury concentrations in the muscle of wild fish showed a high variability among species (0.025-2.20 mg kg-1wet weight). The lowest levels were detected in low trophic-level demersal and pelagic-neritic fish and in young individuals of high trophic-level species. Levels exceeding the European Commission limits were found in large-size specimens of high trophic-level pelagic and demersal species. Fish from intensive farming showed low levels of total mercury (0.008-0.251 mg kg-1). Fish from extensive rearing showed variable contamination levels, depending on the area of provenience. An estimation of the human intake of mercury associated to the consumption of the studied fish and its comparison with the tolerable weekly intake is provided.
authors.affiliation: a Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) , Centro di Ricerca Alimenti Nutrizione , Rome , Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Di Lena
authors.affiliation: a Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) , Centro di Ricerca Alimenti Nutrizione , Rome , Italy.
authors.forename: Irene
authors.initials: I
authors.lastname: Casini
authors.affiliation: a Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) , Centro di Ricerca Alimenti Nutrizione , Rome , Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Caproni
authors.affiliation: b A.Ge.I. Agricoltura Gestione Ittica S.c.r.l ., Rome , Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Fusari
authors.affiliation: a Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) , Centro di Ricerca Alimenti Nutrizione , Rome , Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Orban
mesh_terms: D000818:Animals; D017756:Aquaculture; D004032:Diet; D005398:Fisheries; D005399:Fishes / Q000378:metabolism; D005506:Food Contamination / Q000032:analysis*; D005618:Fresh Water; D006801:Humans; D007558:Italy; D008628:Mercury / Q000032:analysis*; D012307:Risk Factors; D017747:Seafood / Q000032:analysis*; D013045:Species Specificity
chemical_list: D008628:Mercury
keywords: Central Adriatic Sea; Central Tyrrhenian Sea; Food analysis; aquaculture; demersal fish; fish; fishery; food safety; pelagic fish; total mercury