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 Vol. 77; no. 5; pp. 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:	Journal Article
Language:	English
Published:	United States Elsevier Inc 15-03-2012
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 Brazil Testis Seminiferous epithelium cycle Feral cats Spermatogenesis
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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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0093-691X 1879-3231
DOI:	10.1016/j.theriogenology.2011.09.011