Navegando por Palavras-chave "sperm quality"

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    Qualidade seminal, morfologia dos testículos e epidídimos de touros submetidos à dieta contendo gossipol
    (Universidade Federal de Minas Gerais, Escola de Veterinária, 2013-08-01) Santos, M.d.; Rodrigues, R.s.; Freitas, S.h.; Costa, D.s.; Ruas, J.r.m.; Miranda, E.j.; Simões, Manuel de Jesus [UNIFESP]; Universidade de Cuiabá Faculdade de Medicina Veterinária; UFMS Faculdade de Medicina Veterinária e Zootecnia; Epamig; Universidade Federal do Mato Grosso; Universidade Federal de São Paulo (UNIFESP)
    The objective was to evaluate the effect of intake of free gossypol on sperm quality and morphology of the testicles and epididymis of Nelore bulls. Twelve bulls were fed diets containing 3.3g of free gossypol/bull/day (cottonseed) (Group 1, n = 6) and a diet free of gossypol (Group 2, n = 6), respectively. Semen samples were collected in the beginning and end of the experiment which lasted 73 days. In the end of the study the testes and epididymis of bulls were removed to study the effect of free gossypol on histological characteristics. The average consumption of 3.3g of free gossypol/bull/day (mean 7.1mg of free gossypol/kg/day) reduced motility and sperm concentration and increased the percentage of major and total sperm defects, as well as the animals showing testes with seminiferous tubules of smaller thickness, fewer layers of spermatogenic lineage cells, smaller epididymal epithelium thickness and smaller number of sperm within the epididymal ducts, compared to animals with a diet free of gossypol (Group 2). The consumption of 3.3g of free gossypol/bull/day led to changes in morphology and morphometry of the testes and epididymis and reduced sperm quality of bulls.