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"Experientia docet" - Experience is the best teacher

Somatotropin physiology — a review

  • 1994
  • Issue: 1
  • Volume: 24
J.G. van der Walt Page: 1 - 9

The continuing search for improved efficiency has led to the introduction of exogenous growth and lactation promotants to enhance traditional animal production systems. Various species-limited somatotropins have been synthesized by means of recombinant gene technology, thereby allowing milk production in…

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Heritability estimates for different Kleiber ratios obtained from growth performance data in a Hereford herd (Short Communicatio

  • 1994
  • Issue: 2
  • Volume: 24
E. Koster, J. van der Westhuizen and G.J. Erasmus Page: 71 - 72

Heritability estimates for Kleiber ratios associated with growth were obtained for a Hereford stud, subjected to selection for growth over an 11-year-period. Heritability estimates obtained indicate that growth efficiency in terms of the Kleiber ratio is moderately heritable.

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Effect of shade on various parameters of Friesian cows in a Mediterranean climate in South Africa. 2. Physiological responses

  • 1994
  • Issue: 2
  • Volume: 24
C.J.C. Muller, J.A. Botha, W.A. Coetzer and W.A. Smith Page: 56 - 60

The effect of a shade structure on some physiological parameters of lactating Dutch-type Friesian cows was determined over three consecutive summer periods. Plasma cortisol concentration of no-shade cows was significantly (P < 0.05) higher than that of shade cows during…

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The effect of the malignant hyperthermia gene on carcass characteristics of commercial crossbred pigs in the Western Cape (Short

  • 1994
  • Issue: 3
  • Volume: 24
P. Fisher, L. Purves, R. Rubenstein and F.D. Mellett Page: 111 - 112

Malignant hyperthermia (MH) genotype, as expressed by the halothane genotype, was determined on a random sample of 100 pigs originating from the Western Cape. The pigs were slaughtered to investigate the effect of MH genotype on certain carcass characteristics and…

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