Histometria e forma testiculares associadas à qualidade seminal em machos nelore (Bos taurus indicus) criados extensivamente no sudoeste de Goiás
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2014
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This study was developed to verify the associations between the shape of the testicles, the histological changes in testicular parenchyma and seminal quality. Forty two animals, between 30 and 36 months of age who were castrated for termination, had the semen collected. Samples of three portions (proximal, middle, and distal) of the testes were harvested and fixed. It was do breading soundness evaluation of these animals and preparation of slides for histological evaluation of testicular parenchyma. Were evaluated: testicular form; grass movement (MMAS); spermatic vigor (VIG); individual progressive motility (MOT); sperm concentration (CONC); major (DEFMAI), lower (DEFMEN) and total (DEFTOT) sperm defects; average distance between the seminiferous tubules (DISTMED); the average thickness of the seminiferous epithelium (ESPMED); and average percentage of interstitial collagen (COLMED). Animals with testicular classified as long had lower DISTMED, higher ESPMED, lower COLMED, and higher values regarding physical and morphological semen. The DISTMED was lower and ESPMED was higher in the distal portion of the testis. The correlations of DISTMED, ESPMED and COLMED with DEFTOT were respectively 0.51; -0.39; and 0.29. Thus, one can conclude that: elongated testes suffer less tissue damage in the testicular parenchyma, with higher production and better semen quality; the most distal portions of the testis show less tissue damage sperm; and the smallest distances between the seminiferous tubules, the greater thickness of the seminiferous epithelium and the lowest concentration of interstitial collagen in the testis are related to the improvement of sperm quality..
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Andrologia, Bovino, Reprodução, Sêmen, Zebuíno, Andrology, Bovine, Reproduction, Semen, Zebuine
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FERRAZ, Henrique Trevizoli; VIU, Marco Antônio de Oliveira; OLIVEIRA FILHO, Benedito Dias de; LOPES, Dyomar Toledo; VIU, Alessandra Feijó Marcondes; GAMBARINI, Maria Lúcia. Histometria e forma testiculares associadas à qualidade seminal em machos Nelore (Bos taurus indicus) criados extensivamente no sudoeste de Goiás. Archives of Veterinary Science, Curitiba, v. 19, n. 3, p. 73-80, 2014.