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"Experientia docet" - Experience is the best teacher

Heritability of live weight and condition score in a Holstein herd and correlations with milk traits – preliminary estimates

  • 2006
  • Issue: 2
  • Volume: 36
C.J.C. Muller, S.W.P. Cloete, J.J. Olivier, J.A. Botha and H. de Waal Page: 79 - 88

Genetic and environmental parameters for live weight and condition score have been determined for Holstein cows. Genetic correlations with milk traits were also derived. Monthly records were modelled by cubic splines, while the direct, additive effects of animal and the…

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Genetic parameters for weaning weight of Kenyan Boran cattle accounting for direct-maternal genetic covariances

  • 2006
  • Issue: 4
  • Volume: 36
C.B. Wasike, E.D. Ilatsia, J.M.K. Ojango and A.K. Kahi Page: 275 - 281

Genetic parameters were estimated for weaning weight (WW) in Kenya Boran cattle using animal models that assumed non-zero direct-maternal genetic covariance. In addition to the direct and maternal genetic effects, maternal permanent environmental and sire by herd-year interaction effects were…

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Effect of a dietary essential oil mixture on performance of laying hens

  • 2006
  • Issue: 4
  • Volume: 36
M. Cabuk, M. Bozkurt, A. Alcicek, A.U. Cath and K.H.C. Baser Page: 215 - 221

The experiment was conducted to evaluate the effects of dietary supplements of either an essential oil mixture (EOM) or a mannan oligosaccharide (MOS) as alternatives to an antibiotic feed additive (avilamycin) for layers kept under hot summer conditions. Four hundred…

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Utilisation of synthetic amino acids by broiler breeder hens

  • 2006
  • Issue: 2
  • Volume: 36
M.K. Nonis and R.M. Gous Page: 126 - 134

This study was conducted to examine the response of broiler breeder hens to feeds supplemented with synthetic lysine and methionine when fed once or twice daily during peak production. Replacing intact protein with increasing amounts of free lysine and methionine,…

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A preliminary study on the application of image analysis for the measurement of ostrich eggshell traits (Short communication)

  • 2006
  • Issue: 3
  • Volume: 36
S.W.P. Cloete Jr, A.J. Scholtz, Z. Brand and S.W.P. Cloete Page: 155 - 159

Embryonic mortality in developing ostrich embryos has been linked to water loss in eggs during artificial incubation. Traits possibly related to water loss were assessed on shell samples obtained from 512 hatched ostrich eggs. Moderate to high repeatability estimates (0.43…

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Excretal Near Infrared Reflectance Spectrometry to monitor the nutrient content of diets of grazing young ostriches (Struthio ca

  • 2006
  • Issue: 4
  • Volume: 36
S. Landau, R. Nitzan, D. Barkai and L. Dvash Page: 248 - 256

Feeding systems in which young ostriches feed on pasture but have access to concentrates provide better welfare than confined systems but are sustainable only if nutrition is carefully controlled. This study was conducted to evaluate the potential of "excretal NIRS",…

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