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"Experientia docet" - Experience is the best teacher

Genetic parameters for growth traits in South African Limousin cattle

  • 2006
  • Issue: 5
  • Volume: 36
M. van Niekerk and F.W.C. Neser Page: 6 - 9

Accurate genetic parameters are vital for genetic prediction, selection on breeding values and creation of selection objectives. Consequently, records for birth weight (BW), 200 (WW), 400 (YW) and 600 (FW) day weight were analyzed to obtain heritability estimates. These records…

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A developing country perspective on recent developments in

  • 2006
  • Issue: 5
  • Volume: 36
M.M. Scholtz and J. Mamabolo Page: 22 - 25

Animal breeding and genetics have changed markedly, resembling those that have already taken place in the plant sector. These changes are going to be larger with sequenced genomes, transgenic livestock and cloned animals. Animal scientists have now started to protect…

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Effects of vitrification and post-thawing interval on the cytoskeleton and subsequent fertilization rate of in vitro derived bov

  • 2006
  • Issue: 5
  • Volume: 36
T.L. Nedambale, F. Du, J. Xu, X.C. Tian and X. Yang Page: 42 - 45

Vitrification may alter the cytoskeleton (microtubule, meiotic spindle, microfilament, etc.) and the subsequent fertilization rate of in vitro derived bovine oocytes. This study was conducted to evaluate the effect of vitrification and post-thawing incubation periods on the cytoskeleton and fertilization…

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Effect of different grazing pressure by lambs grazing Lolium perenne and Dactylis glomerata pastures during spring on: 1. Diet q

  • 2006
  • Issue: 5
  • Volume: 36
W.A. van Niekerk, Abubeker Hassen, N.H. Casey and R.J. Coertze Page: 46 - 49

This study was undertaken to determine the influence of three grazing pressures [high (HGP), medium (MGP) and low (LGP), corresponding to 30, 50 and 75 g available DM/kg BW/day, respectively] on the quality of herbage consumed by lambs grazing Lolium…

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Effect of different grazing pressures by lambs grazing Lolium perenne and Dactylis glomerata pastures during spring on: 2. Intak

  • 2006
  • Issue: 5
  • Volume: 36
W.A. van Niekerk, Abubeker Hassen, N.H. Casey and R.J. Coertze Page: 50 - 53

This study was undertaken to determine the influence of three grazing pressures [high (HGP), medium (MGP) and low (LGP), corresponding to 30, 50 and 75 g available DM/kg BW/day, respectively] on the performance of lambs grazing Lolium perenne and Dactylis…

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Ruminal degradation and in vitro gas production characteristics of foliage from Atriplex species and Cassia sturtii

  • 2006
  • Issue: 5
  • Volume: 36
W.A. van Niekerk, Abubeker Hassen, P.J. Vermaak, N.F.G. Rethman and R.J. Coertze Page: 54 - 58

This study was undertaken to determine the degradation characteristics and in vitro gas production kinetics of drought tolerant shrubs (Cassia sturtii, Atriplex nummularia and three Atriplex canescens cultivars, viz. Santa Rita, Field Reserve 1 and Rincon) growing under South African…

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Growth performance of indigenous chickens under intensive management conditions in Northwest Ethiopia

  • 2006
  • Issue: 5
  • Volume: 36
Halima Hassen, F.W.C. Neser, A. de Kock and E. Van Marle-Köster Page: 71 - 73

A study was conducted to evaluate the growth performance of indigenous and Rhode Island Red (RIR) chickens under intensive management conditions for 22 weeks using standard commercial diets. Eggs from seven indigenous chicken lines were collected from the respective administrative…

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In vitro digestibility and in situ degradability of avocado meal and macadamia waste products in sheep

  • 2006
  • Issue: 5
  • Volume: 36
A Skenjana, J.B.J. van Ryssen and W.A. van Niekerk Page: 78 - 81

Waste products from the avocado (avocado meal, AM) and macadamia (macadamia oilcake, MOC and macadamia chips, MCH) processing industries have the potential to be included in animal diets, depending on their nutritive value. Avocado meal consisted of oil-extracted avocados unsuitable…

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