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"Experientia docet" - Experience is the best teacher

Direct and maternal variance component estimates for clean fleece weight, body weight and mean fibre diameter in the Grootfontei

  • 1994
  • Issue: 4
  • Volume: 24
J.J. Olivier, G.J. Erasmus, J.B. van Wyk and K.V. Konstantinov Page: 122 - 124

Direct and maternal variance components and resulting heritabilities were estimated by DFREML-procedures for clean fleece weight (CFW), body weight (BW) and mean fibre diameter (MFD) in the Grootfontein Merino stud. Direct heritabilities were estimated as 0.381, 0.289 and 0.626 for…

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Effect of melatonin implants, flushing and teasing on the reproductive performance of spring-mated Dohne Merino ewes

  • 1994
  • Issue: 1
  • Volume: 24
C.B. Nowers, W.A. Coetzer and J.C. Morgenthal Page: 22 - 26

The effect of melatonin implants, flushing and teaser rams on the reproductive performance of spring-mated Dohne Merino ewes was investigated. The ewes (n = 534) were randomly allotted to four treatments, namely (1) no treatment (control), (2) melatonin implants (melatonin),…

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Synchronization of oestrus in sheep: Use of different doses of progestagen outside the normal breeding season (Short communicati

  • 1994
  • Issue: 1
  • Volume: 24
J.P.C. Greyling, W.F. Kotzé, G.J. Taylor, W.J. Hagendijk and F. Cloete Page: 33 - 37

One hundred and thirty Merino ewes were used to test the efficiency of different doses of medroxyprogesterone acetate (MAP) progestagen to synchronize oestrus outside the breeding season. Three treatments, consisting of intravaginal progestagen doses (60 mg, 40 mg, and halved…

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Genetic relationship between growth traits in Bonsmara heifer and bull calves on different nutritional regimes

  • 1994
  • Issue: 2
  • Volume: 24
H.E. Theron, M.M. Scholtz and C.Z. Roux Page: 67 - 70

A system of feeder–breeder dimorphism (large, fast growing offspring in feedlots obtained from small, low mainten¬ance cows on natural pastures) would be profitable in South Africa. The possibility of a genetic basis for feeder–breeder dimorphism was estimated by calculating genetic…

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