Stages and duration of the cycle of the seminiferous epithelium in oncilla (Leopardus tigrinus, Schreber, 1775)

Six adult Leopardus tigrinus (oncilla) were studied to characterize stages of the seminiferous epithelium cycle and its relative frequency and duration, as well as morphometric parameters of the testes. Testicular fragments were obtained (incisional biopsy), embedded (glycol methacrylate), and histo...

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Bibliographic Details
Published in:Theriogenology 2012-03, Vol.77 (5), p.873-880
Main Authors: Balarini, Maytê Koch, de Paula, Tarcízio Antônio Rego, Matta, S.L. Pinto da, Peixoto, J. Vogas, Guião-Leite, F. Lima, Júnior, J.L. Rossi, Junior, A.C. Czermak, Walker, N.J.
Format: Article
Language:English
Subjects:
Animals
Body Weight
Brazil
Felidae - anatomy & histology
Felidae - physiology
Feral cats
Male
Organ Size
Seminiferous Epithelium - cytology
Seminiferous Epithelium - physiology
Seminiferous epithelium cycle
Seminiferous Tubules - anatomy & histology
Seminiferous Tubules - physiology
Sertoli Cells - ultrastructure
Spermatids - ultrastructure
Spermatocytes - ultrastructure
Spermatogenesis
Spermatogonia - ultrastructure
Spermatozoa - ultrastructure
Testis
Testis - anatomy & histology
Testis - chemistry
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Summary:Six adult Leopardus tigrinus (oncilla) were studied to characterize stages of the seminiferous epithelium cycle and its relative frequency and duration, as well as morphometric parameters of the testes. Testicular fragments were obtained (incisional biopsy), embedded (glycol methacrylate), and histologic sections examined with light microscopy. The cycle of the seminiferous epithelium was categorized into eight stages (based on the tubular morphology method). The duration of one seminiferous epithelium cycle was 9.19 d, and approximately 41.37 d were required for development of sperm from spermatogonia. On average, diameter of the seminiferous tubules was 228.29 μm, epithelium height was 78.86 μm, and there were 16.99 m of testicular tubules per gram of testis. Body weight averaged 2.589 kg, of which 0.06 and 0.04% were attributed to the testis and seminiferous tubules, respectively. In conclusion, there were eight distinct stages in the seminiferous epithelium, the length of the seminiferous epithelium cycle was close to that in domestic cats and cougars, and testicular and somatic indexes were similar to those of other carnivores of similar size.
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2011.09.011