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Project Information

Title: Isotope Ratio Studies of Marine Mammals in PWS

Project Year and Number: 1998: 98170-CLO

Other Fiscal Years and Numbers for this Project: 1997: 97170, 1996: 96170

Principal Investigator (PI): Donald Schell, University of Alaska Fairbanks

Assisting Personnel: Amy Hirons

Research Location: Prince William Sound, Gulf of Alaska

Restoration Category: Research

Injured Resources Addressed: Harbor Seals

Abstract: This project uses natural stable isotope ratios to assess trophic structure and food webs in Prince William Sound and contributes to the studies by Alaska Department of Fish and Game personnel to determine the reasons for the decline of harbor seal populations. Through a mix of captive animal studies and a comparison of isotope ratios in prey species and archived and current marine mammal tissues, insight into environmental changes causing the decline may be possible. Preliminary data point strongly toward a major decline in the carrying capacity of the northern Pacific Ocean in the past two decades. This decline is evident in the abundance and distribution of marine biota and is reflected in the carbon isotope ratios of marine mammals of the region.


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Proposal: PDF Not Available

Funding Recommendations: View

Funding Detail For: 1998

Quarterly Project Tasks For: 1998

Annual Report: 1998: Not Available

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
1997: 97170 Not Available 1997: View (PDF)
See Project 98170-CLO See Project 98170-CLO
1996: 96170 Not Available 1996: View (PDF)
See Project 98170-CLO See Project 98170-CLO