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Effect of long-term exposure to AVT on testicular spermatogenesis and plasma androgen levels in adult zebrafish. (A) Density of spermatozoa (number of cells/mm2) in testis sections from males treated with increasing concentrations of AVT (0, 1, 10, or 100 ng/g body weight). Box plots show median, interquartile range, and individual data points. (B) Plasma 11-ketotestosterone (11-KT) concentrations in the same treatment groups. Bars represent mean ± SEM; individual data points are overlaid. Different letters indicate statistically significant differences between groups (p < 0.05). Dots represent individual data points.
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