1. Civil Engineering Research Institute for Cold Region, National Research Institute and Development Agency, Sapporo, Japan;
2. National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Kanagawa, Japan;
3. National Research Institute of Aquaculture, Fisheries Research and Education Agency, Mie, Japan;
4. Tohoku National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Miyagi, Japan;
5. Department of Agriculture Forestry and Fisheries, Kumamoto Prefectural Government, Kumamoto, Japan;
6. Kumamoto Prefectural Fisheries Research Center, Kumamoto, Japan;
7. Plankton Laboratory, Graduate School of Fisheries Sciences, Hokkaido University, Hokkaido, Japan