Testicular morphology.

<p>A–B: Rainbow trout testis at 136 days post fertilization (dpf), control fish (1360 degree-days). This picture shows the differentiation status of a control testis, with a dominance of gonocytes (Go, future spermatogonia) surrounded by supporting cell (S, future sertoli cell) organized in cords (C, future tubules). HES. Scale bar A = 100 µm, B = 50 µm. C–D: Rainbow trout testis at 136 dpf, fish exposed chronically to 0.01 µg/L of EE2 for 76 days. HES. Go: gonocyte; S: supporting cell. Scale bar C = 100 µm, D = 50 µm. E–F: <b>Normal ovarian morphology</b>. Rainbow trout early stage ovarian morphology, control fish (1350 degree-days). PG: primary growth oocyte; L: lamellae; ST: stroma. Scale bar E = 100 µm, F = 50 µm.