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Project Information

Title: Effects of Harbor Seal Metabolism on Stable Isotope Ratio Tracers

Project Year and Number: 2001: 01371-CLO

Other Fiscal Years and Numbers for this Project: 2000: 00371, 1999: 99371

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

Assisting Personnel: None

Research Location: Prince William Sound, Gulf of Alaska

Restoration Category: Research

Injured Resources Addressed: Harbor Seals

Abstract: A major concern when using stable isotope tracers in ecosystem studies is the fidelity with which isotope ratios are transferred up food chains. Use of specific habitats or prey cannot be assessed because geographic gradients in isotope ratios confound trophic effects and/or prey switching. To remove these problems, this project developed complex analytical protocols to isolate amino acids from harbor seals which were pulse-labeled with 15N-amino acids. Subsequent samples of blood plasma and red blood cells over time allowed for estimation of nitrogen incorporation rates. The goals of the final year are to identify pathways of rapid versus slower turnover and to investigate determination of habitat biomarkers.

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Proposal: View PDF (88 KB)

Funding Recommendations: View

Funding Detail For: 2001

Quarterly Project Tasks For: 2001

Annual Report: 2001: Not Available

Final Report: In Review Prior to Publication - For More Information Please Contact Us

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
2000: 00371 Not Available 2000: Not Available
See Project 01371-CLO See Project 01371-CLO
1999: 99371 Not Available 1999: View (PDF)
See Project 01371-CLO See Project 01371-CLO