RT journal article
T1 Assessment of metal and organic pollutants in combination with stable isotope analysis in tunas from the Gulf of Cadiz (east Atlantic)
A1 Pintado Herrera, Marina Guadalupe
A1 López López, José Antonio
A1 Lara Martín, Pablo Antonio
A1 Medina, Antonio
A1 Cadenas, Irene
A1 Giansiracusa, Sara
A1 Corada Fernández, Carmen
A1 Varela Fuentes, José Luis
A2 Química Analítica
A2 Química Física
K1 Heavy metals
K1 Organic pollutants
K1 Stable isotopes
K1 δ15N
K1 δ13C
K1 Thunnus thynnus
K1 Sarda sarda
K1 Katsuwonus pelamis
AB Bioaccumulation patterns of heavy metals (Pb, Cd, Cr, Ni, Fe and Cu) and organic (priority and emerging) pollutants, in combination with stable isotope analysis (SIA), were assessed in muscle and liver of three tuna species from the Gulf of Cadiz (Atlantic bluefin tuna, Thunnus thynnus; Atlantic bonito, Sarda sarda, and skipjack tuna, Katsuwonus pelamis). SIA and contaminant (heavy metal and organic) profiles separately discriminated between species. There was no significant overlap between the trophic niches estimated from isotopic data, suggesting that there are diet differences which may determine differential bioaccumulation patterns. The levels of heavy metals and persistent organic pollutants in muscle of all the individuals analyzed were below the allowable limits established by the current legislation. Concentrations of most contaminants were higher in liver than in muscle, underlining the powerful detoxifying capacity of the liver in tunas. In addition to diet, other factors such as size and age (exposure time to environmental chemicals) explain differences in pollutant accumulation patterns in tissues between species, each with varying degrees of involvement depending on the pollutant class. Our results show that combining contaminant profile data with trophic features based on SIA may help understand pollutant bioaccumulation patterns in upper levels of marine food webs.
SN 1879-0291
YR 2024
FD 2024-03-03
LK http://hdl.handle.net/10498/32775
UL http://hdl.handle.net/10498/32775
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026