Mercury Concentrations in Tuna (Thunnus albacares and Thunnus obesus) from the Brazilian Equatorial Atlantic Ocean
| Autor: | Moises Fernandes Bezerra, Guelson Batista da Silva, F Goyanna, Luiz Drude de Lacerda |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Health Toxicology and Mutagenesis Zoology chemistry.chemical_element 010501 environmental sciences Biology Toxicology 01 natural sciences Predatory fish Ecotoxicology Animals Humans Atlantic Ocean 0105 earth and related environmental sciences Geography Tuna 010604 marine biology & hydrobiology Muscles General Medicine Mercury Pollution Deep water Mercury (element) Fishery chemistry Total hg Fish weight Positive relationship Brazil Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Bulletin of environmental contamination and toxicology. 98(2) |
| ISSN: | 1432-0800 |
| Popis: | Average total Hg concentrations measured in muscle of two species of tuna (Thunnus obesus and T. albacares) captured in the Brazilian Equatorial Atlantic Ocean varied from 95 to 1748 ng.g−1 wet weight in T. obesus and 48 to 500 ng.g−1 wet weight in T. albacares. Higher concentrations in T. obesus are probably related to foraging on deep water carnivorous fish. Smaller individuals of both species showed the lowest concentrations, but a significant positive relationship between fish weight and length and Hg concentrations was found for T. obesus, but not for T. albacares. Largest individuals (>30 kg) of T. obesus showed Hg concentrations ≥1000 ng.g−1, surpassing the legal limits for human consumption, although the average concentration for this species was much lower (545 ng.g−1). Concentrations in T. albacares from the Brazilian Equatorial were lower than those found in the African and in the North Atlantic. No comparison could be made for T. obesus due to few studies for this species in the Atlantic Ocean. |
| Databáze: | OpenAIRE |
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