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Theses and Dissertations (Animal and Wildlife Sciences): Recent submissions
Now showing items 101-120 of 392
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(University of Pretoria, 2019)Heat stress is a cause of great economic loss in poultry production throughout the world. Many methods have been researched to find a solution to alleviate the negative effects of heat stress. Methods include but are not ...
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Effects of feed additives on gut microbial diversity of Clostridium perfringens challenged broilers (University of Pretoria, 2019)The interactions between host and gut microbiota are a rapidly developing field with a plethora of implications. Recent developments in identification and quantification methods of gut microbes allow for a better understanding ...
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(University of Pretoria, 2019)The processing of soya oilcake is important to ensure protein availability and high degradability of the soya proteins. Pig producers in South Africa are concerned about the quality of locally processed soya oilcakes and ...
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(University of Pretoria, 2018)The seven day period post hatching is considered critical as it is thought to account for 8-10% of the final body weight of broilers at 40 days of age. The digestive capacity of newly hatched chicks is quite low, and ...
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(University of Pretoria, 2019)The present study investigated the effects of antioxidants supplementation, freezing extenders, cooling rates and equilibration times on Saanen buck reproductive performance and post-thaw sperm quality. For this reason, ...
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(University of Pretoria, 2019)The effect of zilpaterol hydrochloride (ZH), a β2-adrenergic agonist, on growth, feed intake andcarcass characteristics of broilers were examined. Broilers were raised in an environmentally controlled broiler house for 35 ...
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(University of Pretoria, 2019)Ionophore antibiotic supplementation is standard practice in almost all feedlots in South Africa and many other countries due to its effectiveness in increasing feed efficiency and modulating feed intake. Public concern ...
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(University of Pretoria, 2019)Dietary treatments had a minimal effect on performance parameters in this study, with no response being observed for DM intake, body composition and lactational performance (P < 0.05). The only exception being milk protein ...
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(University of Pretoria, 2019)Four late-lactation Holstein-Friesian cows were utilised in a 4 x 4 Latin square design experiment to evaluate the effect of a calcareous marine algae buffer, Acid Buf 10 (Celtic Sea Minerals), a direct-fed microbial ...
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(University of Pretoria, 2019)Interest in alternative rumen fermentation modifiers has increased significantly since the ban of antibiotic growth promoters in 2006 by the European Union. The use of live yeast in ruminant feed is nothing new, but the ...
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(University of Pretoria, 2019)The pig industry is an important and growing economic sector in South Africa and improvement in efficiency is vital. Reproductive traits have become more important as it has been realised that these entail the main source ...
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(University of Pretoria, 2019)The reduction of antibiotic growth promoter (AGP) use in broiler feed resulted in necrotic enteritis (NE) emerging as a common broiler disease worldwide. In this study, two trials with feed additives and combinations thereof ...
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(University of Pretoria, 2019)Optimum reproduction performance of small ruminants managed under extensive production system can be influenced by the availability of nutrients, especially the mineral content of forages and reproductive management. The ...
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(University of Pretoria, 2019)The search for alternative feed additives for ruminants became essential due to restrictions on the use of antibiotics and synthetic growth promoters in the livestock industry, as well as extensive pressure on the farmers ...
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(University of Pretoria, 2018)Boran cattle are classified as Zebu and have only been recognized as a breed in South Africa since 1995, with the establishment of the Boran Cattle Breeders’ Society of South Africa on 17 May 2003. Although Boran breeders ...
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(University of Pretoria, 2018)Due to the ban of antibiotics across the world there is pressure in finding alternative feed additives that can be used for food animals. The aim of this study was to determine the effect of butyric acid (Novyrate C) and ...
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(University of Pretoria, 2018)In this study 1002 dairy cattle, representing four South African dairy breeds (Ayrshire, Holstein, Jersey and SA Dairy Swiss) were genotyped at the ARC-Biotechnology Platform (Onderstepoort, 0110) with the Infinium Bovine ...
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(University of Pretoria, 2018)A series of in vitro and in vivo experiments was conducted to evaluate the methane-reducing potential of some medicinal plant extracts in order to use them as alternative additives to replace antibiotics such as monensin. ...
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(University of Pretoria, 2018)Globally, dairy producers are employing precision farming practices and incorporating computer software that enables producers to manage large herds at an individual animal level. South African dairy producers have been ...
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(University of Pretoria, 2018)The study was designed to evaluate the effects of timing and duration of low voltage electrical stimulation (LVES) of light and heavy beef carcasses on meat and carcass quality of South African commercial feedlot cattle. ...
Now showing items 101-120 of 392