1. Department of Agriculture, Graduate School of Science and Technology for Innovation, Yamaguchi University, Yoshida, Yamaguchi 753-8515, Japan
2. Faculty of Agriculture, Yamaguchi University, Yoshida, Yamaguchi 753-8515, Japan
3. National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Kanazawa, Yokohama 236-8648, Japan
4. Department of Chemical and Biological Engineering, National Institute of Technology, Ube College, Tokiwadai, Ube, Yamaguchi 755-8555, Japan