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Oil droplet ingestion and oil fouling in the copepod Calanus finmarchicus exposed to mechanically and chemically dispersed crude oil.
Nordtug, Trond; Olsen, Anders J; Salaberria, Iurgi; Øverjordet, Ida B; Altin, Dag; Størdal, Ingvild F; Hansen, Bjørn Henrik.
Afiliação
  • Nordtug T; SINTEF Materials and Chemistry, Environmental Technology, Trondheim, Norway.
  • Olsen AJ; Norwegian University of Science and Technology, Department of Biology, Trondheim, Norway.
  • Salaberria I; Norwegian University of Science and Technology, Department of Biology, Trondheim, Norway.
  • Øverjordet IB; SINTEF Materials and Chemistry, Environmental Technology, Trondheim, Norway.
  • Altin D; BioTrix, Trondheim, Norway.
  • Størdal IF; Norwegian University of Science and Technology, Department of Biology, Trondheim, Norway.
  • Hansen BH; SINTEF Materials and Chemistry, Environmental Technology, Trondheim, Norway.
Environ Toxicol Chem ; 34(8): 1899-906, 2015 Aug.
Article em En | MEDLINE | ID: mdl-25855587
The rates of ingestion of oil microdroplets and oil fouling were investigated in the zooplankton filter-feeder Calanus finmarchicus (Gunnerus, 1770) at 3 concentrations of oil dispersions ranging from 0.25 mg/L to 5.6 mg/L. To compare responses to mechanically and chemically dispersed oil, the copepods were exposed to comparable dispersions of micron-sized oil droplets made with and without the use of a chemical dispersant (similar oil droplet size range and oil concentrations) together with a constant supply of microalgae for a period of 4 d. The filtration rates as well as accumulation of oil droplets decreased with increasing exposure concentration. Thus the estimated total amount of oil associated with the copepod biomass for the 2 lowest exposures in the range 11 mL/kg to 17 mL/kg was significantly higher than the approximately 6 mL/kg found in the highest exposure. For the 2 lowest concentrations the filtration rates were significantly higher in the presence of chemical dispersant. Furthermore, a significant increase in the amount of accumulated oil in the presence of dispersant was observed in the low exposure group.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Tensoativos / Poluentes Químicos da Água / Petróleo / Copépodes Idioma: En Ano de publicação: 2015 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Tensoativos / Poluentes Químicos da Água / Petróleo / Copépodes Idioma: En Ano de publicação: 2015 Tipo de documento: Article