2016
DOI: 10.1590/1678-4162-8748
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Integrity of the plasma membrane, the acrosomal membrane, and the mitochondrial membrane potential of sperm in Nelore bulls from puberty to sexual maturity

Abstract: This study evaluated the plasma membrane integrity, acrosomal membrane integrity, and mitochondrial membrane potential of Nelore bull sperm from early puberty to early sexual maturity and their associations with sperm motility and vigor, the mass motility of the spermatozoa (wave motion), scrotal circumference, and testosterone. Sixty Nelore bulls aged 18 to 19 months were divided into four lots (n=15 bulls/lot) and evaluated over 280 days. Semen samples, collected every 56 days by electroejaculation, were eva… Show more

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Cited by 12 publications
(8 citation statements)
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“…This trend was also observed for frozen-thawed samples, although the changes were not significant. These results are in agreement with observations from previous research where sperm cell motility in fresh samples were positively correlated with increasing age in Holstein bulls (Devkota et al, 2008;Murphy et al, 2018) and Nelore bulls (Reis et al, 2016). Overall, the results from sperm quality analyses show that sperm cells from NR bulls at 17 months of age displayed higher sperm quality compared to 14 months of age.…”
Section: Discussionsupporting
confidence: 92%
“…This trend was also observed for frozen-thawed samples, although the changes were not significant. These results are in agreement with observations from previous research where sperm cell motility in fresh samples were positively correlated with increasing age in Holstein bulls (Devkota et al, 2008;Murphy et al, 2018) and Nelore bulls (Reis et al, 2016). Overall, the results from sperm quality analyses show that sperm cells from NR bulls at 17 months of age displayed higher sperm quality compared to 14 months of age.…”
Section: Discussionsupporting
confidence: 92%
“…On the other hand, it is conceivable that the higher sperm membrane integrity observed in this work after supplementation of the vegetal extract in turn improved both viability and progressive motility of sperm. Accordingly, it is widely known that maintenance of spermatic plasma membrane is required for both vitality and motility, which are landmarks for male fertility throughout species, as indicated by Fraser et al (2001), Ahmad et al (2015), Reis et al (2016). Thus, conservation of plasma membrane structure, as a consequence of increased antioxidant capacity upon M. oleifera extract addition here, also appears as a requirement for sperm viability and progressive motility in ram semen.…”
Section: Discussionmentioning
confidence: 86%
“…Both low fresh semen (sperm's cell individual motility less than 40%) from nine bulls and good fresh semen quality from three bulls were collected via artificial vagina at two ejaculates/bull/week. Measuring of ejaculate volume, next concentration of sperm was calculated by a Neubauer Haemocytometer counting chamber was used for sperm concentration (28). Low and good semen quality was weekly collected from 12 Holstein bulls (9 for low and 3 for good semen quality) for 16 weeks experimental periods.…”
Section: Methodsmentioning
confidence: 99%