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| Figure 2. Effect of single immersion in trenbolone acetate (TA) on 12, 13, 14, or 15 days post-fertilization on masculinization of Oreochromis niloticus fry. Figure depicts mean + SE percentage of males in each treatment with n = 18–98 per treatment (pooled triplicates). Fish were immersed for 3 h at a density of 33 fish l-1. Statistically significant differences from controls are represented by asterisks (** P < 0.01). |