Subacute ruminal acidosis reduces sperm quality in beef bulls

Journal of Animal Science
M J CallaghanV E A Perry

Abstract

Breeding bulls are commonly fed high-energy diets, which may induce subacute ruminal acidosis (SARA). In this experiment, 8 Santa Gertrudis bulls (age 20 ± 6 mo) were used to evaluate the extent and duration of effects of SARA on semen quality and the associated changes in circulating hormones and metabolites. The bulls were relocated and fed in yards with unrestricted access to hay and daily individual concentrate feeding for 125 d before SARA challenge. Semen was collected and assessed at 14-d intervals before the challenge to ensure acclimatization and the attainment of a stable spermiogram. The challenge treatments consisted of either a single oral dose of oligofructose (OFF; 6.5 g/kg BW) or an equivalent sham dose of water (Control). Locomotion, behavior, respiratory rate, and cardiovascular and gastrointestinal function were intensively monitored during the 24-h challenge period. Rumen fluid samples were retained for VFA, ammonia, and lactate analysis. After the challenge, semen was then collected every third day for a period of 7 wk and then once weekly until 12 wk, with associated blood collection for FSH, testosterone, inhibin, and cortisol assay. Percent normal sperm decreased in bulls dosed with OFF after the challen...Continue Reading

References

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Citations

Mar 21, 2018·Animal : an International Journal of Animal Bioscience·D A Kenny, C J Byrne
Nov 16, 2017·Reproduction, Fertility, and Development·K J CoppingV E A Perry
Jul 24, 2018·Veterinary World·Abhishek Kumar MishraRajesh Nigam

Related Concepts

Metabolic Acidosis
Metazoa
Animal Feed (Substance)
Bos indicus
Cattle Diseases
Diet
Hydrogen-Ion Concentration
Y-Chromosome-Bearing Sperm
Stomach Diseases
Semen Quality

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