Cristin-resultat-ID: 1241325
Sist endret: 23. mars 2017, 16:32
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig artikkel
2015

Unexpected interaction with dispersed crude oil droplets drives severe toxicity in atlantic haddock embryos

Bidragsytere:
  • Elin Sørhus
  • Rolf Edvardsen
  • Ørjan Karlsen
  • Trond Nordtug
  • Terje van der Meeren
  • Anders Thorsen
  • mfl.

Tidsskrift

PLOS ONE
ISSN 1932-6203
e-ISSN 1932-6203
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Volum: 10:e0124376
Hefte: 4
Sider: 1 - 21
Open Access

Importkilder

Scopus-ID: 2-s2.0-84928674979

Beskrivelse Beskrivelse

Tittel

Unexpected interaction with dispersed crude oil droplets drives severe toxicity in atlantic haddock embryos

Sammendrag

The toxicity resulting from exposure to oil droplets in marine fish embryos and larvae is still subject for debate. The most detailed studies have investigated the effects of water-dissolved components of crude oil in water accommodated fractions (WAFs) that lack bulk oil droplets. Although exposure to dissolved petroleum compounds alone is sufficient to cause the characteristic developmental toxicity of crude oil, few studies have addressed whether physical interaction with oil micro-droplets are a relevant exposure pathway for open water marine speices. Here we used controlled delivery of mechanically dispersed crude oil to expose pelagic embryos and larvae of a marine teleost, the Atlantic haddock (Melanogrammus aeglefinus). Haddock embryos were exposed continuously to two different concentrations of dispersed crude oil, high and low, or in pulses. By 24 hours of exposure, micro-droplets of oil were observed adhering and accumulating on the chorion, accompanied by highly elevated levels of cyp1a, a biomarker for exposure to aromatic hydrocarbons. Embryos from all treatment groups showed abnormalities representative of crude oil cardiotoxicity at hatch (5 days of exposure), such as pericardial and yolk sac edema. Compared to other species, the frequency and severity of toxic effects was higher than expected for the waterborne PAH concentrations (e.g., 100% of larvae had edema at the low treatment). These findings suggest an enhanced tissue uptake of PAHs and/or other petroleum compounds from attached oil droplets. These studies highlight a novel property of haddock embryos that leads to greater than expected impact from dispersed crude oil. Given the very limited number of marine species tested in similar exposures, the likelihood of other species with similar properties could be high. This unanticipated result therefore has implications for assessing the ecological impacts of oil spills and the use of methods for dispersing oil in the open sea.

Bidragsytere

Elin Sørhus

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Reproduksjon og utvikl.biologi ved Havforskningsinstituttet
  • Tilknyttet:
    Forfatter
    ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo

Rolf Brudvik Edvardsen

Bidragsyterens navn vises på dette resultatet som Rolf Edvardsen
  • Tilknyttet:
    Forfatter
    ved Reproduksjon og utvikl.biologi ved Havforskningsinstituttet

Ørjan Karlsen

  • Tilknyttet:
    Forfatter
    ved Reproduksjon og utvikl.biologi ved Havforskningsinstituttet

Trond Nordtug

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

Terje van der Meeren

  • Tilknyttet:
    Forfatter
    ved Reproduksjon og utvikl.biologi ved Havforskningsinstituttet
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