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Figure 8-5. Developmental changes in the gonads of medaka exposed to 17β-estradiol (E2) during the larval period: (A) 33.5 ng/L, 14-dph; (B) 33.5 ng/L, 16-dph; (C) 145 ng/L, 12-dph; (D) 145 ng/L. Arrowheads indicate testis-ova. Scale bar, 100 μm. (Modified from Hirai et al., 2006a.) |