SPERMATIC MORPHOLOGY ALTERATIONS IN BEEF BULLS SUPPLEMENTED OR NOT WITH ZINC IN MINERAL SALT
DOI:
https://doi.org/10.5216/cab.v10i4.3882Keywords:
Animal ReproductionAbstract
Seminal characteristics of bulls without Zn in the mineral supplementation (ZN-0, n=4, 0mg/Zn/kg/dia) were compared with bulls contemporary with appropriate mineral supplementation (ZN-60FI, n=4, 60mg/Zn/kg/dia). The semen was evaluated biweekly, between 17 and 29 months of age. The prevalence of abnormal chromatin and morphometric profile (length, superior and inferior width (µm) and area (µm2) of the sperm head were included in the analysis. ZN-0 bulls presented reduction of normal sperms in relation to ZN-60FI (63.3 ±2.88 x 74.5 ±2.83%), higher abnormal chromatin (16.7 ±2.05 x 9.3 ±0.81%) and abnormal intermediate piece (9.3 ±0.81 x 3.2 ±0.80%), respectively. Abnormalities of intermediate piece were characterized by irregularities in the mitochondrial organization and rupture of the external dense fibers in electronic microscopy. The area of head sperm of ZN-60 bulls was lower (25.0 ±3.8 x 27.9 ±4.6, p <0.01) in relationship to ZN-0, respectively. We concluded that bulls born and maintained in the field conditions coming of herds with subclinic deficiency of Zn in the basal diet, are subject the reduction of the seminal quality and present larger frequency of intermediary piece abnormalities, sperm chromatin and variations on morphometrics measurements of head sperms.KEY WORDS: Bovine, chromatin, nutrition, semen quality, sperm morphometry, zinc.
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Published
2009-12-17
How to Cite
FERNANDES, C. E.; OLIVEIRA, A. R.; MIRANDA, P. de A. B.; LOPES, S. da C. P.; MORAES, S. da S.; MORAIS, M. da G.; ABREU, U. G. P. de; LANDIM-ALVARENGA, F. da C. SPERMATIC MORPHOLOGY ALTERATIONS IN BEEF BULLS SUPPLEMENTED OR NOT WITH ZINC IN MINERAL SALT. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 4, p. 1074–1083, 2009. DOI: 10.5216/cab.v10i4.3882. Disponível em: https://revistas.ufg.br/vet/article/view/3882. Acesso em: 28 nov. 2024.
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Animal Production
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