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"Experientia docet" - Experience is the best teacher

Carcass characteristics of immunocastrated steers finished on diets with different energy patterns

  • 2021
  • Issue: 1
  • Volume: 51
A.F. de Moura, D.C.A. Filho, I.L. Brondani, L.B. Pereira, G. Joner, A.P.M. Martini, R.F. Pacheco, A.R. Mayer, M.B. da Silva & D. Borchate Page: 113 - 119

The aim of this study was to evaluate the effects of various dietary energy levels on the carcass and meat characteristics of feedlot-finished steers. A total of 27 purebred and crossbred Charolais and Nellore steers were used, with a mean…

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Carcass and meat quality attributes of Malawi Zebu steers fed Vachellia polyacantha leaves or Adansonia digitata seed as alternative protein sources to Glycine max

  • 2019
  • Issue: 2
  • Volume: 49
G. Chingala, E. Raffrenato, K. Dzama, L.C. Hoffman & C. Mapiye Page: 395 - 402

To enhance smallholder beef farmers’ capacity to cope with animal feed shortages, especially dietary protein induced by climate change, it is important to evaluate the feeding value of low-cost protein sources naturally available in the environment. The aim of the…

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Effects of protein sources on performance, carcass composition, blood parameters and meat quality in Charolais heifers

  • 2018
  • Issue: 4
  • Volume: 48
M. Ragni, M.A. Colonna, A. Lestingi, S. Tarricone, F. Giannico, G. Marsico & A.M. Facciolongo Page: 683 - 694

The aim of the present study was to evaluate the effects of feeding faba bean and sweet lupin as alternative protein sources to soybean on productive performance, blood parameters, carcass composition, and chemical-physical characteristics of meat and its fatty acid…

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Influence of bioregion and environmental factors on the growth, size and reproduction of Bonsmara cows

  • 2017
  • Issue: 4
  • Volume: 47
E.C. Webb, P.C. Visagie, J. van der Westhuizen & H.A. Snyman Page: 542 - 552

A better understanding of the influences of the bioregion (production environment) and environmental factors on the productivity of beef cows is vital in the pursuit of improving beef production. The influence of bioregion and important environmental factors in South Africa…

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Genome-wide identification of breed-informative single-nucleotide polymorphisms in three South African indigenous cattle breeds

  • 2016
  • Issue: 3
  • Volume: 46
A.A. Zwane, A. Maiwashe, M.L. Makgahlela, A. Choudhury, J.F. Taylor & E. van Marle-Köster Page: 302 - 312

Access to genotyping assays enables the identification of informative markers that discriminate between cattle breeds. Identification of these markers can assist in breed assignment, improvement and conservation. The objective of this study was to identify breed informative markers to discriminate…

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Reproduction performance of beef cattle mated naturally following synchronization in the Central Bushveld bioregion of South Africa

  • 2014
  • Issue: 5
  • Volume: 44
S.M. Grobler, M.M. Scholtz, J.P.C. Greyling & F.W.C. Neser Page: 70 - 74

The estimated calving percentage of beef cattle is 62% in the commercial sector of South Africa.  Fertility is regarded as the main component influencing total herd efficiency in beef cattle. If the long calving seasons can be shortened and the…

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The profitability and production of a beef herd on transitional Cymbopogon- Themeda veld, receiving three different levels of lick supplementation – Preliminary results

  • 2014
  • Issue: 5
  • Volume: 44
L.A. Foster, P.J. Fourie & F.W.C. Neser Page: 31 - 35

The importance of containing costs through the optimal utilization of feed emphasizes the need to optimize, rather than maximize, the rate of reproduction. It is, however, unknown which lick supplementation regimen, provided to an extensive beef herd on mixed veld,…

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Estimates of lactation curve parameters for Bonsmara and Nguni cattle using the weigh-suckle-weigh technique

  • 2013
  • Issue: 5
  • Volume: 43
A. Maiwashe, N.B. Nengovhela, K.A. Nephawe, J. Sebei, T. Netshilema, H.D. Mashaba, L. Nesengani & D. Norris Page: 12 - 16

Milk production accounts for about 60% of the variation in weaning weight and is therefore considered an economically important trait in beef production. However, milk production data is not routinely available in beef improvement programmes and therefore weaning weight is…

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Genetic parameter estimates for live animal ultrasound measures of carcass traits in South African Angus cattle

  • 2011
  • Issue: 3
  • Volume: 41
M.M. Seroba, A. Maiwashe, K.A. Nephawe & D. Norris Page: 243 - 249

Genetic parameters were estimated for body weight at scanning (SCW) and live animal ultrasound measures of rump fat thickness (P8FT), rib fat thickness (RBFT), rib eye-muscle area (REA) and intramuscular fat percentage (IMF) for South African Angus beef cattle. A…

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Ruminal acidosis: A review with detailed reference to the controlling agent Megasphaera elsdenii NCIMB 41125 (Review)

  • 2010
  • Issue: 2
  • Volume: 40
H.H. Meissner, P.H. Henning, C.H. Horn, K-J. Leeuw, F.M. Hagg and G. Fouché Page: 79 - 100

Ruminal acidosis is discussed with reference to causes and economic and health implications. Distinction is made between the acute form which with proper adaptation to high energy diets is seldom encountered and the more problematic chronic or sub-acute form, commonly…

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Effect of Megasphaera elsdenii NCIMB 41125 drenching on health and performance of steers fed high and low roughage diets in the

  • 2009
  • Issue: 4
  • Volume: 39
K-J. Leeuw, F.K. Siebrits, P.H. Henning and H.H. Meissner Page: 337 - 348

Lactate utilising bacteria (LUB) assist in reducing the risk of ruminal lactate acidosis when high concentrate diets are fed to feedlot cattle. Ruminal lactate acidosis can lead to lower animal performance and morbidity. Preliminary studies suggested that the strain,Megasphaera elsdenii…

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Genetic parameter estimates for tick resistance in Bonsmara cattle

  • 2009
  • Issue: 4
  • Volume: 39
M.A. Budeli, K.A. Nephawe, D. Norris, N.W. Selapa, L. Bergh and A. Maiwashe Page: 321 - 327

The objectives of the study were to estimate genetic parameters for tick resistance and to evaluate the effect of the level of tick infestation on the estimates of genetic parameters for South African Bonsmara cattle. Field data of repeated tick…

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Invloed van geboortemassa op die voorkoms van distokie in die Noord-Transvaalse Bosveld (Kort mededeling)

  • 1988
  • Issue: 4
  • Volume: 18
A. Smith, D.A. Pauw & P.I. Wilke Page: 168 - 171

Influence of birth mass on incidence of dystocia in the Northern Transvaal Bushveld.  Seven cow herds (Afrikaner, Hereford, Bonsmara, Simmentaler, Hereford x Afrikaner, Simmentaler x Afrikaner, Simmentaler x Hereford x Afrikaner), consisting of 40 animals each, were investigated from 1979…

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