Data/hora: 08/06/2024 00:58:22

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 09/04/1996
Data da última atualização: | 03/04/2017
Autoria: | RISCO, C. A.; CHENOWETH, P. J.; LARSEN, R. E.; VELEZ, J.; SHAW, N.; TRAN, T.; CHASE JUNIOR, C. C.
Título: | The effect of gossypol in cottonseed meal on performance and on hematological and semen traits in postpubertal Brahman bulls.
Ano de publicação: | 1993
Fonte/Imprenta: | Theriogenology, v.40, n.3, p.629-642, 1993.
Idioma: | Inglês
Conteúdo: | The effects of a cottonseed meal diet containing high levels of free gossypol on hematological traits, including erythrocyte osmotic fragility and semen characteristics, were examined during an 11-week period. Eigh Brahman bulls were randomly assigned to 1 of 2 groups. The control group (n=4) was fed a mixture of soybean meal and corn. The treated group (n=4) was fed a mixture of cottonseed meal and corn. Both groups were allowed hay free choice. The treated group consumed 8.2 g of free gossypol per bull per day. Th percentage of normal spermatozoa was lower (P<0.01) in the treated than in the control group from Weeks 5 (49+-9.8 vs 83+-3.2%), which was primarily influenced by changes in mid piece morphology in the treated bulls. Erythrocyte osmotic fragility was higher (P<0.001) in the treated than in the control group over the entire study period, althrought group values diverged more acutely from Week 7 of treatment. Sperm motility was lower (P=0.04) in treated bulls than in control bulls at Week 9 (52+-9.8 vs 82+-6.2%). These data suggested that concurrent discernable changes in bull erythrocyte osmotic fragility and in semen characteristics can occur following commencement of a diet containing 8.2g of free gossypol per day.
Palavras-Chave: | Bull.
Thesagro: | Animal; Reprodução; Sêmen; Touro.
Thesaurus Nal: | reproduction.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (31476-1) - ADD - SP - PP - SP14772 -  - 14772 - DIS