6533b85dfe1ef96bd12bdf9a

RESEARCH PRODUCT

Comparison of stable isotope composition and inorganic and organic contaminant levels in wild and farmed bluefin tuna, Thunnus thynnus, in the Mediterranean Sea

Antonio MazzolaCecilia Doriana TramatiSalvatrice Vizzini

subject

Settore BIO/07 - EcologiaEnvironmental EngineeringDichlorodiphenyl DichloroethyleneHealth Toxicology and MutagenesisFish farmingAquaculturechemistry.chemical_compoundAquacultureMetals HeavyPCBs HCB pp’-DDE heavy metals stable isotopes tuna farmingHexachlorobenzeneHydrocarbons ChlorinatedMediterranean SeaAnimalsEnvironmental ChemistryPollutantCarbon IsotopesNitrogen IsotopesbiologyTunabusiness.industryChemistryStable isotope ratioPublic Health Environmental and Occupational Healthfood and beveragesGeneral MedicineGeneral ChemistryHexachlorobenzeneContaminationbiology.organism_classificationPolychlorinated BiphenylsPollutionLiverEnvironmental chemistryMultivariate AnalysisbusinessTunahuman activitiesWater Pollutants ChemicalThunnusEnvironmental Monitoring

description

Abstract Stable isotope composition (δ13C and δ15N) and persistent pollutants, including heavy metals (Hg, Cd, Pb, As, Cu, Zn) and organochlorine compounds (PCBs, HCB and p,p′-DDE), were measured in muscle and liver tissues of wild and farmed bluefin tunas to investigate the changes occurring during the farming period and to assess the quality, in terms of contaminants, of the final product. At the end of farming, the food supplied was clearly integrated into the tuna tissues as derived from stable isotope signatures, and, contrarily to the literature findings obtained for other species, farmed tunas showed slight variations in persistent elements and chemical compounds in comparison with wild fish. The low tissue turnover of long-lived adult tunas together with the short farming period appeared to act to preserve the initial low contamination levels in the absence of new, elevated contamination sources (feed and environment), determining an acceptable quality of the final aquaculture product.

yearjournalcountryeditionlanguage
2009-07-24Chemosphere
https://doi.org/10.1016/j.chemosphere.2009.12.041