Análise morfofuncional do testículo da onça-pintada (Panthera onca) adulta

• Autor(a) principal: Azevedo, Maria Helena Ferreira de
• Data de Publicação: 2004
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5115
• topic: Onça pintada; Espermatogênese; Testículos; Reprodução; Panthera onca; Jaguar; Spermatogenesis; Testis; Reproduction; Panthera onca; CNPQ::CIENCIAS BIOLOGICAS::MORFOLOGIA

The present work proposed evaluating the organization of the components of the testes, the seminiferous epithelium cycle, the intrinsic yield of each fase of spermatogenic process, the testicular sperm reserve, as well as the correlations of these items with corporal and testicular biometric parameters.The medium corporal weight of the jaguar in the present experiment was 78,5 kg, of which about 0,034% are located in the testicular mass, and 0,022% specifically in the seminiferous tubules, which represented about 77,7% of the testicular parenchyma. The average diameter of seminiferous tubules in jaguars was 257 µm, and the average thickness of the seminiferous epithelium was about 90m. Jaguars have about 12,2 meters of seminiferous tubules by testicle gram. The general spermatogenic yield of the jaguar was about 23,4 cells and each Sertoli cell was able to sustain and to keep about 19,2 germ cells, 11 of which were round spermatides. In each seminiferous epithelium cycle about 166 million of spermatozoids were produced by testicle gram. In the jaguar the Leydig cells occupy an average 0,0036% of the corporeal weight and its average number by testicle gram is within the scope for most mammals: between 20 and 40 million. The obtained data supplied pertinent information about the spermatogenic process of this feline of the brazilian fauna, for subsidy to projects of conservation and protection of the wild life that involve reproduction programs.