Title: LTM Program - Evaluating Chronic Exposure of Harlequin Ducks to Lingering Exxon Valdez Oil
Project Year and Number: 2014: 14120114-Q
Other Fiscal Years and Numbers for this Project: None
Principal Investigator (PI): Dan Esler
Assisting Personnel: None
Restoration Category: Research
Injured Resources Addressed: Not Specified
Abstract: This Lingering Oil project is associated with Gulf Watch Alaska, the integrated Long-term Monitoring of Marine Conditions and Injured Resources and Services funded by the EVOSTC. Harlequin duck populations in PWS were injured as a result of the Exxon Valdez oil spill, with evidence for both immediate acute mortality and longer term injury from chronic exposure to oil spilled in 1989. A series of EVOSTC projects have examined exposure of harlequin ducks to lingering oil as a factor constraining recovery, using the cytochrome P4501A biomarker, CYP1A. Harlequin ducks showed elevated CYP1A in oiled areas from 1998 through 2011 relative to unoiled areas, which was interpreted to indicate continued exposure to residual oil over that period. Data from March 2013 indicated that CYP1A induction was similar between oiled and unoiled areas, suggesting that exposure to lingering oil had ceased by that time, 24 years after the spill. As recommended in previous iterations of this body of work, we propose to re-sample harlequin duck CYP1A in March 2014 to confirm 2013 findings and substantiate our conclusion that exposure to lingering oil has abated. This work contributes to understanding of the timeline and process of recovery of injured species, as well as the nearshore ecosystem, generally.
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Proposal: View PDF (76 KB)
Funding Recommendations: View
Funding Detail For: Not Available
Quarterly Project Tasks For: Not Available
Annual Reports: Not Available
Final Report: View
Publications from this Project: None Available