Bull. Jpn. Soc. Fish. Oceanogr. 71(3), Page 175-182, 2007   Variation in migration patterns of pond smelt, Hypomesus nipponensis, in Japan determined by otolith microchemical analysis Satoshi Katayama1†, Toshiro Saruwatari2, Kazuhiko Kimura3, Motohito Yamaguchi4, Tsuyoshi Sasaki5, Mitsuru Torao6, Takashi Fujioka7 and Nozomi Okada8 1