1. Graduate School of Fisheries Sciences, Hokkaido University
2. Department of Applied Biosciences, Toyo University
3. Hokkaido Seabird Conservation Group
4. Faculty of Life and Environmental Sciences, University of Tsukuba
5. Fisheries Stock Assessment Center, Fisheries Resource Institute, Japan Fisheries Research and Education Agency
6. The Atmosphere and Ocean Research Institute, The University of Tokyo
7. Doto Research Branch, Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization
8. Port and Airport Research Institute