Abstract
The Deepwater Horizon oil spill in 2010 overlapped with the spawning of many pelagic fish species in the Gulf of Mexico, including mahi-mahi (Coryphaena hippurus). PAH released during the spill have been shown to cause photo-induced toxicity under UV radiation. To verify this, mahi-mahi embryos were exposed to high-energy water accommodated fractions of source and naturally weathered oils for up to 48 h. The co-exposure timing with UV radiation varied between an early development exposure for 8 hr or a late development exposure for 8 hr. The UV co-exposure had a photo-induced toxic effect on hatching success for all oil types and exposure scenarios. A more sensitive developmental window to photo-induced toxicity was observed when UV exposure occurred late in development. Source Oil B was over six-fold more toxic, and Massachusetts source oil was 1.6-fold more toxic when the embryos were co-exposed to UV light late in development. Weathered oil from the surface co-exposure with UV late in development resulted in bradycardia in the mahi-mahi.
Original language | English (US) |
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Pages (from-to) | 1592-1598 |
Number of pages | 7 |
Journal | Environmental Toxicology and Chemistry |
Volume | 36 |
Issue number | 6 |
DOIs | |
State | Published - Jun 1 2017 |
Keywords
- Oil spills
- Photo-induced toxicity
- Polycyclic aromatic hydrocarbons (PAHs)
ASJC Scopus subject areas
- Environmental Chemistry
- Health, Toxicology and Mutagenesis