Document Detail

Testis stereology, seminiferous epithelium cycle length, and daily sperm production in the ocelot (Leopardus pardalis).
MedLine Citation:
PMID:  19853903     Owner:  NLM     Status:  MEDLINE    
Similar to most wild felids, the ocelot (Leopardus pardalis) is an endangered species. However, knowledge regarding reproductive biology of the ocelot is very limited. Germ cell transplantation is an effective technique for investigating spermatogenesis and stem cell biology in mammals, and the morphologic characterization of germ cells and knowledge of cycle length are potential tools for tracking the development of transplanted germ cells. Our goal was to investigate basic aspects related to testis structure, particularly spermatogenesis, in the ocelot. Four adult males were used. After unilateral orchiectomy, testis samples were routinely prepared for histologic, stereologic, and autoradiographic analyses. Testis weight and the gonadosomatic index were 11+/-0.6g and 0.16+/-0.01%, respectively, whereas the volume density of seminiferous tubules and Leydig cells was 83.2+/-1.6% and 9.8+/-1.5%. Based on the acrosomic system, eight stages of spermatogenesis were characterized, and germ cell morphology was very similar to that of domestic cats. Each spermatogenic cycle lasted 12.5+/-0.4 d, and the entire spermatogenic process lasted 56.3+/-1.9 d. Individual Leydig cell volume was 2522mum(3), whereas the number of Leydig and Sertoli cells per gram of testis was 38+/-5x10(6) and 46+/-3x10(6). Approximately 4.5 spermatids were found per Sertoli cell, whereas daily sperm production per gram of testis was 18.3+/-1x10(6), slightly higher than values reported for other felids. The knowledge obtained in this study could be very useful to the preservation of the ocelot using domestic cat testes to generate and propagate the ocelot genome.
R C Silva; G M J Costa; L M Andrade; L R Fran?a
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Theriogenology     Volume:  73     ISSN:  1879-3231     ISO Abbreviation:  Theriogenology     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2009-12-17     Completed Date:  2010-02-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  157-67     Citation Subset:  IM    
Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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MeSH Terms
Felidae / anatomy & histology*
Seminiferous Epithelium / anatomy & histology*
Spermatozoa / cytology
Testis / anatomy & histology*,  cytology,  physiology

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