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"Experientia docet" - Experience is the best teacher

Effects of non-steroidal growth implant and dietary zilpaterol hydrochloride on growth and carcass characteristics of feedlot lambs

  • 2018
  • Issue: 4
  • Volume: 48
E.C Webb, J. Allen & S.D. Morris Page: 601 - 608

The effects of steroidal growth implants alone or in combination with β-adrenergic agonist feed additives have not been studied thoroughly in mutton sheep in South African feedlot conditions. This study investigated the effects of a non-steroidal growth implant zeranol (Ralgro®),…

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Effects of grape pomace and vitamin E on performance, antioxidant status, immune response, gut morphology and histopathological responses in broiler chickens

  • 2018
  • Issue: 2
  • Volume: 48
S. K. Ebrahimzadeh, B. Navidshad, P. Farhoomand & F. Mirzaei Aghjehgheshlagh Page: 324 - 336

We investigated the effects of grape pomace (GP) and vitamin E on the performance, antioxidant status, immune response, gut morphology and histopathological responses in broiler chickens. Two hundred and fifty male broiler chickens (Ross 308) were allocated to five dietary…

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Gene expression and maturation evaluation of sheep oocytes cultured in medium supplemented with natural antioxidant source

  • 2018
  • Issue: 2
  • Volume: 48
I. A. H. Barakat, R. A. Alajmi, K. M. A. Zoheir, L. M. Salem & A. R. Al-Hemidiy Page: 261 - 270

Any improvements in assisted reproduction techniques at experimental level are important in in vitro production of large animal and human embryos. The in vitro embryo production system includes three major steps, namely in vitro maturation of the primary oocytes, in…

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Castration of male livestock and the potential of immunocastration to improve animal welfare and production traits: Invited Review

  • 2017
  • Issue: 6
  • Volume: 47
T. Needham, H. Lambrechts & L.C. Hoffman Page: 731 - 742

Growing consumer awareness about animal welfare has led to the assessment of the impact of common farming practices, such as physical castration, on animal well-being under production conditions. Physical castration is used in livestock industries to prevent indiscriminate breeding, control…

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Effects of feeding corn silage, pelleted, ensiled, or pelleted and ensiled alfalfa on growth and carcass characteristics of lamb

  • 2017
  • Issue: 5
  • Volume: 47
F.L. Fluharty, H.N. Zerby, G.D. Lowe, D. D. Clevenger & A.E. Relling Page: 704 - 711

Two experiments were conducted to evaluate the effects of corn silage (CS) and alfalfa (pelleted (AP), haylage (AH), or combination (APH)) on lamb growth and carcass characteristics. The objective of Experiment 1 (Exp. 1) was to compare AH to CS…

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Effect of days in feedlot on growth performance and carcass characteristics of Merino, South African Mutton Merino and Dorper lambs

  • 2017
  • Issue: 1
  • Volume: 47
T.S. Brand, E.J. van der Westhuizen, D.A. van der Merwe & L.C. Hoffman Page: 26 - 33

This study investigated the effect of feedlot production on lamb growth characteristics of three common South African breeds: Merino, South African Mutton Merino (SAMM) and Dorper. Lambs were supplied with a balanced diet (16% crude protein, 9.41 MJ ME/kg feed)…

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Ovulatory response and embryo quality in Katahdin ewes supplemented with palm oil

  • 2016
  • Issue: 3
  • Volume: 46
S. Torres-Zapata, C. Luna-Palomera, J.A. Aguilar-Cabrales, J.A. Peralta-Torres, J.R. Aké-López, F. Sánchez-Dávila & J. Abad-Zavaleta Page: 261 - 268

The aims of this study were to evaluate the superovulatory response (SR), embryo quality and embryonic development in Katahdin ewes that received a dietary supplement of palm oil (PO). Ten ewes were assigned to receive 35 g palm oil (n…

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Direct greenhouse gas emissions of the South African small stock sectors

  • 2013
  • Issue: 3
  • Volume: 43
C.J.L. du Toit, W.A. van Niekerk & H.H. Meissner Page: 340 - 361

There are increasing concerns about the impact of agriculture and livestock production on the environment. As a result, it is important to have accurate estimations of greenhouse gas (GHG) emissions if reduction measures are to be established. In this study…

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Productive and reproductive performance of Dorper and its crossbreds under a Romanian semi-intensive management system

  • 2013
  • Issue: 2
  • Volume: 43
D. Gavojdian, L.T. Cziszter, N. Pacala & M. Sauer Page: 219 - 228

The overall objectives of the research were to evaluate the effect of cross-breeding Dorper (DO) rams with Turcana (TA) ewes on growth and reproductive performances of F1 DOxTA and R1 DOx(DOxTA) crossbred lambs reared under a semi-intensive management system; to…

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Carcass composition of Namaqua Afrikaner, Dorper and SA Mutton Merino ram lambs reared under extensive conditions

  • 2013
  • Issue: 5
  • Volume: 43
A. Burger, L.C. Hoffman, J.J.E. Cloete, M. Muller & S.W.P. Cloete Page: 27 - 32

This study evaluated the differences in the muscle-fat-bone yield of Namaqua Afrikaner (NA), Dorper (D) and SA Mutton Merino (SAMM) ram lambs. The breeds constituted an indigenous, hardy and late maturing, fat-tailed breed (NA), an early maturing, commercial meat breed…

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The PRNP gene polymorphism in Rough-coated Pomeranian Landrace sheep

  • 2013
  • Issue: 2
  • Volume: 43
W.S. Proskura, R. Pilarczyk, S. Borkowska, A. Marciniak, I. Szatkowska, J. Wójcik & A. Dybus Page: 174 - 180

Prion protein (PrP) is a membrane glycoprotein whose abnormal form is believed to cause a group of disorders known as transmissible spongiform encephalopathies (TSEs), which affect the brain and nervous system of both human beings and animals. The most familiar…

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The effect of age and gender on the fat distribution in Merino lambs

  • 2010
  • Issue: 5
  • Volume: 40
E.J. van der Westhuizen, T.S. Brand, L.C. Hoffman and B.B. Aucamp Page: 459 - 461

The goal of this study was to determine the effect of gender on visceral and subcutaneous fat distribution of Merino lambs finished off under feedlot conditions. The diet (16% protein, 10MJ ME/kg feed) was fed ad libitum and animals had…

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Feeding of whole cottonseed on performance, carcass characteristics and intestinal morphology of Zandi lambs

  • 2011
  • Issue: 3
  • Volume: 41
M. Absalan, A. Afzalzade, M. Mirzaee, S.D. Sharifi, M. Khorvash & M. Kazemi-Benchenari Page: 309 - 317

The present study was conducted to determine the effect of including different levels of whole cottonseed (WCS) in the finishing diet of lambs on their dry matter intake (DMI), live weight gain, feed conversion ratio (FCR, kg feed/kg gain), carcass…

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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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