Research Article

Revelation of ZnS Nanoparticles Induces Follicular Atresia and Apoptosis in the Ovarian Preovulatory Follicles in the Catfish Mystus tengara (Hamilton, 1822)

Figure 11

The histological section of the ovary of a M. tengara during the late spawning phase (August) showing all of the previtellogenic oocytic stages [Oo: oogonia, Epo: early perinucleolar oocyte, and Lpo: late perinucleolar oocyte] with few apoptotic follicles (af) that are gradually merging with the ovarian stroma when the tissues are treated with ZnS nanoparticles at the concentration of 500 μg/L [IA: Iron-Alum Haematoxylin].