1. Chair of Marine Chemical Resource Development, Graduate School of Fisheries Sciences; Hokkaido University; Hakodate Japan
2. Laboratory of Aquaculture Biology, Faculty of Fisheries Sciences; Hokkaido University; Hakodate Japan
3. Laboratory of Humans and the Ocean, Faculty of Fisheries Sciences; Hokkaido University; Hakodate Japan
4. Laboratory of Marine Chemical Resource Development, Faculty of Fisheries Sciences; Hokkaido University; Hakodate Japan