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Project Information

Title: Marine Bird and Sea Otter Population Abundance of PWS: Trends Following EVOS

Project Year and Number: 1993: 93045

Other Fiscal Years and Numbers for this Project: 2011: 10100751, 2010: 10100751, 2008: 080751, 2007: 070751, 2006: 050751, 2005: 050751, 2004: 040159, 2002: 02159, 2001: 01159, 2000: 00159, 1999: 99159, 1998: 98159, 1997: 97159-CLO, 1996: 96159, 1994: 94159

Principal Investigator (PI): Bev Agler, DOI

Assisting Personnel: David Irons, Steve Kendall, Pam Seiser

Research Location: Prince William Sound

Restoration Category: Monitoring

Injured Resources Addressed: Bald Eagles , Black Oystercatchers , Common Loons , Common Murres , Cormorants , Harlequin Ducks , Kittlitz's Murrelets , Marbled Murrelets , Pigeon Guillemot , Sea Otters

Abstract: About 35,000 birds and 1,000 sea otters were recovered following the spill. Based on modeling studies using carcass, search effort, and population data, the total number of marine birds killed by the spill was between 300,000 and 645,000 birds, with the best approximation between 375,000 and 435,000 birds. The majority of birds killed were murres. The total number of sea otters killed by the spill in Prince William Sound was estimated to be between 3,500 and 5,000 otters. These estimates reflect direct mortality occurring in the first five months after the spill and do not include chronic effects or loss of reproductive output.

Restoration of marine bird and sea otter populations will require population estimates to determine whether recovery is occurring or if declines are continuing. This project will benefit marine birds and sea otters by revealing species that show continuing injury due to the Exxon Valdez oil spill; this information is necessary to plan meaningful restoration actions.

This project will also provide valuable information on the distribution and habitat use of these species. Survey data from this project have been used for these purposes by investigators of harlequin ducks, marbled murrelets, black oystercatchers and sea otters. Survey methods are flexible enough to provide for collection of more detailed information (such as age class data) if such information is requested by investigators of those species.


Geographic Regions Prince William Sound
Species Marine Mammals - Sea Otters
Fields of Expertise Ecology

Proposal: PDF Not Available

Funding Recommendations: View

Funding Detail For: 1993

Quarterly Project Tasks For: 1993

Annual Report: 1993: Not Applicable

Final Report: View

Publications from this Project: None Available

More information may be available for this project under other years:

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Project Number Proposal Annual Reports Final Report Data
2011: 10100751 View (PDF) 2011: View (PDF)
2010: View (PDF)
View No datasets
2008: 080751 View (PDF) 2008: Due 09/01/2008
View No datasets
2007: 070751 View (PDF) 2007: View (PDF)
See Project 080751 See Project 080751
2006: 050751 View (PDF) 2006: Not Applicable
2005: Not Applicable
View No datasets
2004: 040159 View (PDF) 2004: View (PDF)
See Project 050751 See Project 050751
2002: 02159 View (PDF) 2002: Not Available
See Project 050751 See Project 050751
2001: 01159 View (PDF) 2001: Not Available
See Project 050751 See Project 050751
2000: 00159 Not Available 2000: View (PDF)
See Project 050751 See Project 050751
1999: 99159 Not Available 1999: Not Available
See Project 050751 See Project 050751
1998: 98159 Not Available 1998: View (PDF)
See Project 050751 See Project 050751
1997: 97159-CLO Not Available 1997: Not Available
See Project 96159 See Project 96159
1996: 96159 Not Available 1996: Not Available
View No datasets
1994: 94159 Not Available 1994: Not Available
View No datasets