The Assessment of Different Dietary Selenium Resources on Reproductive Performance, Spawning Indicators, and Larval Production of Red Tilapia (Oreochromis mossambicus × O. niloticus) Broodfish

Figure 2

Cross-sections of tissues micrographic of ovary from female brooder fishes revealed four treated groups: (a) (CTR) control group fed basal diet, (b) (Na₂SeO₃) fish group fed selenite supplemented diets, (c) (NPSe) fish group received nanoselenium supplemented diet, and (d) (Na₂SeO₃ + NPSe) fish group fed a mixture of selenite and nanoselenium group. The vitellogenic oocyte (V), stroma (ST), previtellogenic oocyte phase (PR), postvitellogenic oocyte phase (PO), and empty follicle (E) (H&E and scale bar: 50 µm).