title: Trace elements in two marine fish species during estuarine residency: non-essential versus essential.
abstract: Trace element levels in fish are of particular interest, owing the potential risk to human health. In accordance, juveniles of Dicentrarchus labrax and of Liza aurata were sampled and arsenic, cadmium, chromium, selenium and zinc were determined in the muscle. The levels of trace elements in muscle demonstrated to be similar for both species and sites, with the exception of selenium levels at reference, which seemed to be higher in D. labrax. Moreover, apart from arsenic levels in muscle, all elements were in conformity with the existent regulatory guidelines for fish consumption. The dietary intake of each element was also calculated, with arsenic and selenium showing intakes above the recommended dietary allowances. Nevertheless, no arsenic speciation was carried out and thus no accurate risk evaluation could be established. Additionally, selenium levels never exceeded the dietary allowances more than five times, which are considered safe.
authors.affiliation: Chemistry Department of the University of Aveiro & CESAM, 3810-193 Aveiro, Portugal. cmieiro@ua.pt
authors.forename: C L
authors.initials: CL
authors.lastname: Mieiro
authors.forename: J P
authors.initials: JP
authors.lastname: Coelho
authors.forename: M
authors.initials: M
authors.lastname: Pacheco
authors.forename: A C
authors.initials: AC
authors.lastname: Duarte
authors.forename: M E
authors.initials: ME
authors.lastname: Pereira
mesh_terms: D000818:Animals; D001151:Arsenic / Q000378:metabolism; D002104:Cadmium / Q000378:metabolism; D002857:Chromium / Q000378:metabolism; D004032:Diet / Q000706:statistics & numerical data; D004784:Environmental Monitoring; D063366:Estuaries; D005399:Fishes / Q000378:metabolism*; D006801:Humans; D018570:Risk Assessment; D012643:Selenium / Q000378:metabolism; D014131:Trace Elements / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism
chemical_list: D014131:Trace Elements; D014874:Water Pollutants, Chemical; D002104:Cadmium; D002857:Chromium; D012643:Selenium; D015032:Zinc; D001151:Arsenic