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"Experientia docet" - Experience is the best teacher

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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Adjustment of heterogeneous variances and a calving year effect in test-day models for national genetic evaluation of dairy catt

  • 2006
  • Issue: 3
  • Volume: 36
B.E. Mostert, H.E. Theron, F.H.J. Kanfer and E. van Marle-Köster Page: 165 - 174

South Africa implemented test-day models for genetic evaluations of production traits, using a Fixed Regression Test-Day Model (FRTDM), which assumes equal variances of the response variable at different days in milk, the explanatory variable. Data at the beginning and at…

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Polymorphism of the pig pre-implantation protein 3 (prei3) gene and its association with litter size traits

  • 2006
  • Issue: 3
  • Volume: 36
B.Y. Niu, Y.Z. Xiong, F.E. Li, C.Y. Deng, S.W. Jiang, L.Z. Ye, J. Wang, S.H. Ding and W.H. Guo Page: 209 - 214

The pre-implantation protein 3 (prei3), which might play a role in pre-implantation embryogenesis, is one of the promising candidate genes for litter size traits in pigs. In this study, a single nucleotide polymorphism (SNP: T802G) in intron 6 of the…

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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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Correlation between an oestrogen receptor gene and reproductive traits in purebred and crossbred pig populations (Short communic

  • 2006
  • Issue: 4
  • Volume: 36
F.E. Li., C.Y. Deng, S.W. Jiang, M.G. Lei, B. Zuo, R. Zheng, J.L. Li, D.Q. Xu and Y.Z. Xiong Page: 243 - 247

The relationship between an oestrogen receptor (ESR) gene and reproductive traits in 11 Large White (LW), 19 Landrace (L), 22 Meishan (MS), 22 Meishan x Large White (MS x LW) F1, 26 Large White x Meishan (LW x MS) F1, 16 Landrace x Large White…

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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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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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