1. Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964
2. Alaska Department of Fish and Game, Fairbanks 99701
3. Lamont-Doherty Geological Observatory of Columbia University
4. Department of Physiology and Biophysics, University of Illinois, Urbana 61801
5. Department of Oceanography, University of Maine, Walpole 04573