Fig. 8 in Reproductive cycle of the Neotropical cichlid yellow peacock bass Cichla kelberi: A novel pattern of testicular development

Fig. 8. Testicular morphological characteristics of the Regression phase in C. kelberi. (a) Testicular proximal region, highlighting the big volume of melano-macrophage centers (mmc). (b) Gonad in restructuration with details to the Sertoli cells phagocytizing (Sp) the residual sperm (rSz), and the apoptotic cells (double arrow). (c) Transversal section along the testis in Regression. (d) Testicular periphery (dorsal region) highlighting the intense proliferation of primary spermatogonia in this region (Sg). primary spermatogonial cluster (dotted line); I - interstitial tissue; Sp - Sertoli cell in phagocytosis; Sc1 - primary spermatocysts; Sg1 - primary spermatogonia; Sg2 - secondary spermatogonia. H.E. stain.