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"Experientia docet" - Experience is the best teacher

Effects of production stage and fertility traits on milk production of pasture-grazed Holstein and Jersey cows in a Mediterranean-type climate region

  • 2022
  • Issue: 4
  • Volume: 52
N.M. Bangani, C.J.C. Muller, K. Dzama, C.W.C Cruywagen & V.E. Imbayarwo-Chikosi Page: 552 - 562

The aim of this study was to compare the milk production of Holstein and Jersey cows on pasture as affected by parity, lactation stage, calving season, age at first calving, and calving interval. Test-day lactation records of 122 Holstein and…

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Comparative changes in monthly blood urea nitrogen, total protein concentrations, and body condition scores of Nguni cows and heifers raised on sweetveld

  • 2015
  • Issue: 1
  • Volume: 45
L. Mapfumo & V. Muchenje Page: 96 - 103

The objective of this study was to determine the comparative changes in the monthly blood urea nitrogen (BUN) concentration, total protein (TP) concentration in blood serum and the body condition score of Nguni cows and heifers raised on sweetveld. Twenty-four…

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Variation in individual piglet birth weights in a Large White × Landrace sow herd (Short communication)

  • 2014
  • Issue: 1
  • Volume: 44
T.J. Zindove, E.F. Dzomba, A.T. Kanengoni & M. Chimonyo Page: 80 - 84

Within-litter birth weight variation in pigs is increasingly becoming important in influencing the profitability of pig enterprises. The objective of the study was to characterize within-litter birth weight variation in piglets from Large White × Landrace sows. The study was…

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Animal factors affecting fatty acid composition of cow milk fat: A review

  • 2012
  • Issue: 2
  • Volume: 42
E. Samková, J. Špička, M. Pešek, T. Pelikánová & O. Hanuš Page: 83 - 100

The review summarizes literature dealing with the effects of animal factors (breed, cow individuality, parity and stage of lactation) on fatty acid (FA) composition of milk fat. Genetic parameters affecting the composition of the FAs in milk are reviewed and…

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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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