FIGURE 2 in Comparative analysis of the reproductive activity of Leporinus piau (Characiformes: Anostomidae) in lentic and lotic environments

FIGURE 2 | Histological sections of testes of Leporinus piau in different stages of gonadal maturation stained by HE. (A) At rest (M1), containing only spermatogonia (SPG) and lumen of closed seminiferous tubules. (B) Initiation of maturation with a small number of spermatozoa (SPZ) in the lumen of the seminiferous tubules. (C) Maturation/mature (M2), with seminiferous tubules filled with spermatozoa (SPZ). (D) Spent (M3), with the lumen of the seminiferous tubules open and an appreciable amount of spermatozoa. Bars: A and D = 40µm; B and C = 200µm.