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Browsing Natural and Agricultural Sciences by Supervisor "Webb, E.C. (Edward Cottington)"
Now showing items 21-40 of 76
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(University of Pretoria, 2012-06-06)In this study, 20 young steers received no beta-adrenergic agonist (C), 100 animals all received zilpaterol hydrochloride, with 1 group only receiving zilpaterol (Z) while the other 4 groups received zilpaterol and vitamin ...
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(University of Pretoria, 2012-08-03)The last 50 years was characterized by a dramatic decrease in free-roaming cheetah populations and consequently the cheetah now appears on the IUCN Red List for Threatened Species. In order to save cheetahs from extinction, ...
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(University of Pretoria, 2015)The purpose of this research was to investigate the effect of zilpaterol hydrochloride (ZH) in combination with a non-steroidal growth implant on growth and carcass characteristics of feedlot lambs. The use of ZH is common ...
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(University of Pretoria, 2022-12-15)The aim of this study was to evaluate the possible effects of two different zilpaterol hydrochloride (ZH) beta-agonists - with further focus being placed on the viability of the generic Grofactor® product when compared ...
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(University of Pretoria, 2017)This study investigated the effects of electrical stimulation and delayed chilling on carcass and meat quality of indigenous and Boer goats in South Africa. Ten goats per breed were randomly selected from typical indigenous ...
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(University of Pretoria, 2017)This study formed part of a greater departmental research project on methane mitigation strategies in livestock, fed poor quality feeds or kept under extensive grazing conditions. Globally, livestock represents a large ...
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(University of Pretoria, 2019-11-18)This study investigated the effects of electrical stimulation (ES), age and weight at slaughter, breed type, post-freezing ageing, and the proteolytic extract of Solanum dubium (Gubbain) seeds on the carcass and meat quality ...
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(University of Pretoria, 2016)Cheetah are endangered for various reasons. As a result, captive care and breeding of cheetah has been done in an effort to help the survival of the species, however, captive survival rates are low. It is known that cheetah ...
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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, 2014)The purpose of this study was to provide baseline data on the mineral status of impala and to investigate the possibility of using impala as sentinel species for monitoring important elements that may affect livestock ...
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(University of Pretoria, 2018)The aim of this study was to investigate the effects of muscle energy metabolism and calpain proteolytic system on meat colour and tenderness in different Southern African ecotypes. A total of sixty-five (65) goats ...
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(University of Pretoria, 2012-06-07)The aim of this study was to develop and examine the validity of using a phenotype scoring system (PTS), a new concept, in evaluating milk yield and constituents in different goat genotypes (Indigenous, British Alpines, ...
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(University of Pretoria, 2018)This study was based on measurements taken from the milk recording scheme of the Agricultural research Council (ARC). In this study the effects of milk urea nitrogen (MUN) on reproduction parameters of dairy cows in South ...
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(University of Pretoria, 2019)For years indigenous cattle breeds in communal areas have been and still are managed in adverse production environments. As a result, their growth and reproduction efficiency have been affected. Poor management, high ...
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(University of Pretoria, 2012-08-01)This study was part of a larger study to develop an animal production model to obtain the optimum beef tenderness. There is a variety of different beef production systems being used in South Africa. The production systems ...
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(University of Pretoria, 2012-09-14)This research project consisted of five experiments. The main objective of this study was to determine the effects of restricted feeding and season on growth, carcass characteristics, meat chemical composition, reproduction ...
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(University of Pretoria, 2019)The exploitation of crocodilians in the 1950s-1970s resulted in their being listed under the CITES protection appendices. Farming of crocodilians began in South Africa in the 1970s, and has since become an international ...
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(University of Pretoria, 2015)The effects of three commercial flukicidal products on the growth and body mass change of beef cows and heifers were investigated due to the concerns of farmers that these substances may have adverse effects on the performance ...
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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. ...
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(University of Pretoria, 2009-04-16)The aim of the present study was to determine if the breeding potential of 25-month old, extensively kept, Bonsmara beef bulls can be predicted from production data, spermatozoal characteristics and/or blood hormone ...
Now showing items 21-40 of 76