Center for Sustainable Agriculture and Forestry Faculty of Agriculture Niigata University 94-2 Koda Sado Niigata 952-2206 Japan;
Aomori Prefectural Asamushi Aquarium 1-25 Babayama Asamushi Aomori Aomori 039-3501 Japan;
Faculty of Agriculture Niigata University 8050 Ikarashi-ninocho Nishi-ku Niigata 950-2181 Japan;