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Fig. 17. Frequency of quivering and attending behaviors in the sham-operated, castrated, and castrated + testosterone (T) 500 μg/fish-treated 1+ precocious male masu salmon. Differences in mean frequencies of quivering and attending behaviors among experimental groups were analyzed by one-way analysis of variance (ANOVA) followed by Fisher's PLSD. Differing letters represent significant differences at P < 0.05 among all groups. Reprinted with permission from Fish. Sci., 68, Munakata et al., Sex steroids control migration of masu salmon, 49–52, Fig. 3, © 2002, The Japanese Society of Fisheries Science.

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