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Air Contact and the pH of Extended Porcine Semen
Artificial insemination is a routine procedure in sows. But what happens if the porcine semen is exposed to air? There are lots of effects, e.g. on the sperm motility parameters. A brandnew and very interesting and important study from Belgium.

In this study, the pH-rise during storage of extended porcine semen was examined.

This pH-rise was found to be caused by CO2-loss from the buffering system in the extender and was more pronounced with increasing air volume in the recipient.

An influence on sperm motility parameters was observed between semen samples stored in the presence of different amounts of ambient air in the recipient.

Velocity parameters and percentage motile spermatozoa were significantly lower for semen stored in recipients with higher air volume and elevated pH.

Adjusting extender preparation by avoiding air contact in commercial AI-centres may minimize the pH-rise and its influence on sperm motility.



Source: P Vyt, D Maes, SU Sys, T Rijsselaere, A Van Soom (2007): Air Contact Influences the pH of Extended Porcine Semen. In: Reproduction in Domestic Animals 42 (2), 218–220.


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SWINE PRACTICE

Beta hydroxy beta methyl butyrate and the muscle fibre composition in growing pigsmembers
The aim of this recently online published study was to investigate the effects of excess leucine (Leu) vs. its metabolites α‐ketoisocaproate (KIC) and β‐hydroxy‐β‐methyl butyrate (HMB) on Leu metabolism, muscle fibre composition and muscle growth in growing pigs. Thirty‐two pigs with a similar initial weight (9.55 ± 0.19 kg) were fed 1 of 4 diets for 45 days: basal diet, basal diet + 1.25% L‐Leu, basal diet + 1.25% KIC‐Ca, basal diet + 0.62% HMB‐Ca. The results are very promising!

  • L-carnitine as a feed additive in pigs and poultrymembers
  • PCV-3 in pig serum samples from Spainmembers
  • Oral fluid and plasma oxytetracycline concentrations after i.m. administration in pigsmembers
  • Novel highly pathogenic porcine reproductive and respiratory syndrome virus in Chinamembers
  • Calibration of the TonoVet and Tono-Pen Vet tonometers in pigs´ eyesmembers
  • Measurement of serum cobalamin and folate concentrations in pigs with commercially assaysmembers
  • Commercially available immunoassays for serum cobalamin and folate in pigsmembers
  • Ultrasound-guided vessel catheterization in adult pigsmembers
  • Association between porcine cytomegalovirus infection and PMWSmembers
  • Suitable antibiotic therapy to treat swine brucellosismembers
  • Pancuronium versus vecuronium in pigs members
  • Haemodynamic effects of pancuronium and vecuronium in pigsmembers


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