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Project Information

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

Project Year and Number: 1999: 99371

Other Fiscal Years and Numbers for this Project: 2001: 01371-CLO, 2000: 00371

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 with the use of stable isotope tracers in ecosystem studies is the fidelity with which ratios are transferred up food chains. Use of specific habitats or prey cannot be assessed if geographic gradients in isotope ratios are laid on top of trophic effects and/or prey switching. To remove these problems, this project will seek specific conservative biomarkers such as essential amino acids or fatty acids that carry isotope ratios unmodified by metabolism. Amino acids labeled with 15N and 13C will be used to follow transamination and carbon relocation during metabolic processes in the seals at the Alaska SeaLife Center. Specific fatty acid isolation and determination of suitability as habitat biomarkers will follow in years two and three of the project.


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Proposal: PDF Not Available

Funding Recommendations: View

Funding Detail For: 1999

Quarterly Project Tasks For: 1999

Annual Report: 1999: View (274 KB)

Final Report: See Project 476

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
2001: 01371-CLO View (PDF) 2001: Not Available
In Review Prior to Publication - For More Information Please Contact Us No datasets
2000: 00371 Not Available 2000: Not Available
See Project 01371-CLO See Project 01371-CLO