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Doctoral Degrees (Animal Sciences)
Recent Submissions
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Studies on genetic responses and genomic characterisation in South African and Australian sheep
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The current scope of small stock breeding in South African (SA) Merinos is constrained. In contrast to Australia (AUS) and New Zealand, no traits indicative of animal resilience or fitness are currently ... -
The application of genomics and transcriptomics for the characterization of the genetic diversity of tick-resistance in Angus, Brahman, Nguni, and Santa Gertrudis cattle artificially infested with Rhipicephalus microplus and Rhipicephalus decoloratus
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Tick resistance is a complex polygenic trait that is governed by immuno-genetic mechanisms that are currently not fully understood. It is, however, currently accepted that the Bos indicus, Zebu and Sanga ... -
Development of a livestock management database system towards sustainable smallholder farming systems in South Africa
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The commercialisation of smallholder farmers has taken the lead on the development agenda of many developing countries. Invariably, the majority of smallholder livestock producers are less productive ... -
The refinement of an artificial insemination protocol in ostriches
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: This study refined artificial insemination (AI) in ostriches by conducting several studies that covered a range of topics. The first of these determined seasonal effects on male traits and suggested ... -
The search for biomarkers in the growth prediction of the West Coast Rock Lobster, Jasus lalandii
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The West Coast rock lobster (WCRL) Jasus lalandii is a key ecological species and an important fisheries resource in South Africa. The resource is heavily depleted to 1.8% of pristine levels. The fishery ... -
Black Soldier Fly (Hermetia illucens) larvae as an alternative ingredient in processed meat
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Black soldier fly (Hermetia illucens) larvae (BSFL) (Diptera: Stratiomyidae), primarily used as an animal feed ingredient, is beginning to show promise as a sustainable ingredient for human consumption. ... -
Interventions to enhance the quality of South African chevon
(Stellenbosch : Stellenbosch University, 2021-04)ENGLISH ABSTRACT: Goat meat is not readily available commercially in South Africa, probable as preferences of the post-Apartheid new upcoming middle-class consumer is not yet taken into consideration. Historically, little ... -
Exploring the potential health benefits from Hermetia illucens and Chrysomya chloropyga larvae meal in poultry diets
(Stellenbosch : Stellenbosch University, 2021-04)ENGLISH ABSTRACT: The unaffordability and scarcity of good quality protein sources are especially severe for small scale farmers in rural areas of Africa. For this reason, the monogastric animal feed industry is in urgent ... -
Genetics studies of cichlid Oreochromis shiranus towards sustainable aquaculture and fisheries management in Malawi
(2020-12)ENGLISH ABSTRACT: Oreochromis shiranus is an economically important fish species in Malawi, but levels of harvest from the wild have declined due to overexploitation and habitat degradation. There is an urgent need to ... -
Comparing feed use efficiency and enteric gas production of Holstein and Jersey cows in a kikuyu pasture-based system using mathematical models
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Feed use efficiency to synthesise maximum amounts of milk while ensuring responsible use and protection of the environment is of significance for sustainable milk production. The aim of this study was to ... -
Modelling the growth, feed intake and backfat deposition of different South African sheep breed types
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: In order to set up a decision support system which can be applied to the feedlot finishing of lambs, models relating to the growth and production of lambs need to be developed. This dissertation presents ... -
Beef production and biopreservative effects of dietary citrus and winery by-products
(Stellenbosch : Stellenbosch University, 2020-04)ENGLISH ABSTRACT: The overall objective of the current study was to compare citrus pulp and grape pomace as dietary supplements and biopreservative for beef production and quality. Angus steers were fed 150 g/kg of dried ... -
Feed supplement and meat preservative potential of grape pomace (Vitis vinifera) in lamb production
(Stellenbosch : Stellenbosch University, 2019-03)ENGLISH ABSTRACT: The objective of the overall study was to evaluate the potential of grape (Vitis vinifera L.) pomace (GP) as a feed supplement and meat preservative in lamb production. Pomace from two red grape (Pinotage ... -
Modulation of starch digestion for productive performance in dairy cows
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: In this thesis, a series of experiments were conducted to ultimately investigate the effects of modulating site of starch digestion by varying ruminal fermentability of various starch sources on feed ... -
Development of a cost-effective system for ovoviviparous production of Artemia nauplii at low-salinity as live food for the larvae of the African catfish (Clarias gariepinus: Burchell, 1822)
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: The brine shrimp Artemiais a small crustacean used as live food in fish and shell fish culture. Among other live food types which are commonly used in aquaculture, Artemia is widely known and accepted ... -
Genetics of ovine resistance to gastrointestinal nematodes
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: This study consists of various papers on the genetic evaluation of sheep for resistance to gastrointestinal nematodes in South Africa using faecal worm egg count (FWEC) as a proxy. Outcomes from the study ... -
The potential of quercetin to improve growth performance and meat quality in rabbits
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: Flavonoids are naturally-occurring bioactive compounds that may improve livestock production and product quality. Unfortunately, while their antioxidant, antimicrobial and other activities have been ... -
Immunocastration and its application in ram lambs
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: In South Africa, Dohne Merino sheep are farmed extensively for wool and meat production. Ram lambs are typically castrated to enable easier management of mixed-sex flocks by manipulating reproduction and ... -
Beef production and quality of Malawi Zebu steers fed diets containing rangeland-based protein sources under feedlot conditions
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The current study evaluated smallholder farmers perceptions towards climate change, their identification of potential protein sources during drought, the nutrition profile of these protein sources and ... -
Genomics as part of an integrated study of smallholder sheep farming systems in the Western Cape, South Africa
(Stellenbosch : Stellenbosch University, 2017-12)ENGLISH ABSTRACT: The aim of this study was to evaluate the productivity of smallholder sheep farming systems in the Western Cape, South Africa, using an interdisciplinary approach, combining socio-economic factors and ...
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