4.6 Article

Duration of spermatogenesis and daily sperm production in the jaguar (Panthera onca)

Journal

THERIOGENOLOGY
Volume 70, Issue 7, Pages 1136-1146

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.theriogenology.2008.06.035

Keywords

testis morphometry; spermatogenic efficiency; spermatogenic cycle length; jaguar

Funding

  1. Minas Gerais State Foundation (FAPE-MIG)
  2. Minas Gerais State Foundation (FAPEMIG)
  3. Brazilian National Council for Research (CNPq)

Ask authors/readers for more resources

The jaguar, like most wild felids, is an endangered species. Since there Lire few data regarding reproductive biology for this species, our main goal was to investigate basic aspects of the testis and spermatogenesis. Four adult male jaguars were utilized to determine the duration of spermatogenesis. two animals, received an intratesticular injection of H-3-thymidine. Mean (+/- SEM) testis weight and the gonadosomatic index were 17.7 +/- 2.2 g and 0.05 +/- 0.01%. respectively, whereas the seminiferous tubules and the Leydig cells volume density were 74.7 +/- 3.8 and 16.7 +/- 1.6%. Eight stages of spermatogenesis were characterized, according to the tubular morphology system and acrosome development. Each spermatogenic cycle and the entire spermatogenic process (based on 4.5 cycles) lasted approximately 12.8 +/- 0.01 and 57.7 +/- 0.07 d. The number of Sertoli and Leydig cells per grain of testis was 29 +/- 4 x 10(6) and 107 +/- 12 x 10(6). Based on the number of round spermatids per pachytene spermatocyte (2.8 +/- 0.3: 1: meiotic index) significant cell loss (30%) occurred during the two meiotic divisions. There were approximately eight sperniatids for each Sertoli cell (Sertoli cell efficiency), whereas the daily sperm production per grant of testis was 16.9 +/- 1.2 x 10(6). We expect that in the near future, the knowledge obtained in the present investigation will facilitate. utilizing germ cell transplantation. preservation of the germinal epithelium and the ability to generate sperm front jaguars in testes of domestic cats. (C) 2008 Elsevier Inc. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available