Effect of gonadal steroids on gonadotropin subunit genes expression in male red seabream (Pagrus major)

SONOKO YAMAGUCHI1*, KOICHIRO GEN2, KOICHI OKUZAWA2, MICHIYA MATSUYAMA1,AND HIROHIKO KAGAWA3 1 Faculty of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 812-8581, Japan (syamagu@fra.affrc.go.jp), 2 Inland Station, National Research Institute of Aquaculture, Fisheries Research Agency, Tamaki, Mie 519-0423, Japan, 3 National Research Institute of Aquaculture, Fisheries Research Agency, Nansei, Mie 516-0196, Japan