Table 1.
Biometry, morphometry and stereology of the testicular components of Sturnina lilium, during dry and rainy seasons.
Figure 1.
Sturnira lilium testis submitted to TUNEL technique.
Brown nuclei are positive to the TUNEL assay. a) Dry season. ST: Seminiferous tubule. Bar: 30 µm. Inset: pachytene spermatocyte going throw apoptosis. Bar: 10 µm. b) Rainy season. Arrow: Pachytene spermatocytes undergoing apoptosis. Bar: 20 µm. c) Negative control. Bar: 30 µm. d) Positive control. Bar: 30 µm.
Figure 2.
Light microscopy of seminiferous tubules cross-sections in the beginning (a) and in the end (b) of stage 1 of seminiferous epithelium cycle in Sturnira lilium.
a) Dry season. PL/L: Preleptotene/Leptotene spermatocytes; PC: Pachytene spermatocyte; RS: Round spermatid; SC: Sertoli cell's nucleus. Bar: 30 µm. b) Rainy season. A: Type-A spermatogonia; ZG: Zygotene spermatocyte; PC: Pachytene spermatocyte; RS: Round spermatid. Bar: 20 µm.
Table 2.
Corrected germ cell populations in stage 1 of the seminiferous epithelium cycle and sperm production indexes of the bat Sturnira lilium, during dry and rainy seasons.
Figure 3.
Ultrastructure of the germ cells in stage 1 of the seminiferous epithelium cycle in Sturnira lilium.
a) Dry season. PL/L: Preleptotene/Leptotene spermatocytes connected by cytoplasmic bridge; →: Basal lamina; I: Interstitium. Inset: Cytoplasmic bridge. Bars: 3 µm. b) Dry season. SC: Sertoli cell's nucleus; *: Sertoli cell's nucleolus; →: Basal lamina; I: Interstitium. Bar: 2 µm. c) Rainy season. →: Linear chromatin regions inside the nucleus of a leptotene primary spermatocyte. Bar: 2 µm. d) Rainy season. RS: Round spermatid nucleus; Ac: Acrosome. Bar: 5 µm.