Publications by authors named "Vera Fernanda Martins Hossepian de Lima"

Article Synopsis
  • The study investigated the effects of long-term supplementation of young Nellore bulls with rumen-protected polyunsaturated fatty acids (PUFAs) and the addition of catalase to semen extenders on semen quality and embryonic development.
  • Results showed that PUFA supplementation negatively impacted total sperm motility and increased plasma membrane damage in frozen/thawed semen, but these effects did not persist after freezing.
  • While the paternal diet influenced the lipid content in the resulting embryos, it did not affect the overall in vitro fertilizing ability of the sperm.
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Ultrasonography can provide information about the integrity of organs; however, rarely is applied to the reproductive organ evaluation of bulls. The objective of the present study was to characterize and compare values for variables and ultrasonographic characteristics of the testes, epididymis and accessory sex glands, as well as spectral Doppler indices of the testicular and internal iliac arteries, between peri- and post-pubertal Nelore and Caracu bulls. Nelore (n = 203) and Caracu (n = 79) bulls were assigned by age class: peri-pubertal (12-15 months) and post-pubertal (> 22 months).

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The aim of this study was to evaluate the effects of breed and season on semen quality parameters of zebu bulls. Data (1,632 registers) of semen production from Gir (n = 4) and Nelore (n = 15) bulls were collected between October 2005 and November 2009. The ejaculates were collected twice a week during various seasons (summer, fall, winter, and spring) and evaluated for the following semen parameters: ejaculate volume, sperm concentration, sperm motility, forward progressive motility (FPM), and sperm morphology.

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The aims of this study were to assess in vivo fertility and in vitro sperm characteristics of different sires and to identify sperm variables important for the prediction of conception rate. Multiparous Nelore cows (n = 191) from a commercial farm underwent the same timed artificial insemination (timed-AI) protocol. Three batches of frozen semen from three Angus bulls were used (n = 9).

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