Fig. 4
Fig. 4. Histological sections of adult zebrafish gonads in AB and Nadia strains. Testes of AB males, NAZW neomales and NAZZ males and ovaries of AB and NAZW females exposed to 28 °C (control) and 36 °C (high temperature) during sex differentiation. Abbreviations for males: type A undifferentiated spermatogonia (Aund), differentiated spermatogonia (Adiff), type B spermatogonia (B), spermatocytes (Spc), spermatids (Spd) and spermatozoa (Spz); for females: primary growth oocytes (PG), cortical alveolar oocytes (CA), vitellogenic oocytes (Vtg), postovulatory follicles (Pofs) and atretic oocytes (A). Staining: Hematoxylin and Eosin. Scale bar = 500 μm. Note: high temperature resulted in 100% males in NA, so no NAZW females were available for analysis.