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"Experientia docet" - Experience is the best teacher

An evaluation of the use of blood metabolite concentrations as indicators of nutritional status in free-ranging indigenous goats

  • 2000
  • Issue: 2
  • Volume: 30
R. Pambu-Gollah, P.B. Cronje and N.H. Casey Page: 115 - 120

The aim of this study was to determine whether blood metabolite concentrations in free-ranging indigenous goat are sensitive to expected variations in nutrient supply, and whether they could be used to evaluate different kidding season at two locations subject to…

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Genetic studies on the South African Mutton Merino: growth traits

  • 2000
  • Issue: 3
  • Volume: 30
F.W.C. Neser, G.J. Erasmus and J.B. van Wyk Page: 172 - 177

Genetic parameters were estimated for 36-, 42-, 50-, 100- and 150-day weight in the South African Mutton Merino breed. The direct heritability estimates obtained were 0.270, 0.366, 0.278, 0.185 and 0.115 respectively. The maternal heritability estimates for the respective weights…

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Genetic parameter estimates for type traits in the South African Jersey breed

  • 2000
  • Issue: 3
  • Volume: 30
D.J. van Niekerk, F.W.C. Neser and G.J. Erasmus Page: 186 - 192

Known environmental effects influencing type trait scores in South African Jersey cattle were identified. Variance components and heritabilities were estimated for these traits as well as genetic correlations among them and with production traits. Heritability estimates were generally low to…

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Pre-weaning growth traits of the Hereford breed in a multibreed composite beef cattle population

  • 2000
  • Issue: 3
  • Volume: 30
H. Skrypzeck, S.J. Schoeman, G.F. Jordaan and F.W.C. Neser Page: 220 - 229

Data from a multibreed composite beef cattle population, managed under intensive irrigated grazing conditions, were used to estimate direct additive heritabilities (h2a), maternal heritabilities (h2m) and maternal permanent environmental effects (c2) birth weight (BW) and weaning weight (WW) of the…

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