1. Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan, Wadsworth Center, New York State Department of Health and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, New York 12201-0509, Ocean Environment System Program, Yosu National University, San 96-1, Dundeok-dong, Yeosu 550-749, Korea, and Faculty of Fishery, Nagasaki University, 1-14 Bunkyo-machi,...