1. Department of Molecular and Applied Bioscience Graduate School of Biosphere Sciences, Hiroshima University, 1–4–4 Kagamiyama, Higashi-hiroshima, Hiroshima 739–8528, Japan
2. Takahashigawa Fisheries Cooperative Association, 52 Teppouchou, Takahashi, Okayama 716–1146, Japan