Log in

Relevant bibliographies by topics / Animal populations – South Africa / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Animal populations – South Africa.

Dissertations / Theses on the topic 'Animal populations – South Africa'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Animal populations – South Africa.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Laubscher, Sarah-Jane. "A study of sex/age ratios in wild ungulate populations : an approach to designing an appropriate sampling strategy for estimating the structure of wild ungulate populations on Rooipoort Nature Reserve." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51627.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: This thesis investigates the population structure of a number of ungulate species occurring within Rooipoort private reserve. Specifically the study serves to make estimates of the ratio of males to females and calves to cows within each species population under observation, based on the data collected. Data were also analysed to ascertain the distribution patterns of the species in question, in relation to vegetation type and habitat. Distribution data were additionally compared to distribution data collected at an earlie

APA, Harvard, Vancouver, ISO, and other styles

2

Osmers, Karl Benjamin. "Genetic structuring between gemsbok (oryx gazella) populations and the impact of the founder effect on isolated populations." Thesis, University of Limpopo (Turfloop Campus), 2012. http://hdl.handle.net/10386/746.

Full text

Abstract:

Thesis (M.Sc. (Zoology)) --University of Limpopo, 2012<br>A microsatellite-based study was performed on five populations of Gemsbok (Oryx gazella). This study was aimed at estimating genetic diversity in introduced South African gemsbok populations (an opportunity that arose when additional animals from the same source were imported into South Africa), and determine genetic structure. Population sizes at the time of sampling were: Namibia (n = 6500), Cohen (n = 70), Tempelhof (n = 55), STS Kalahari Game Ranch (n = 1000) and Elias (n = 35). The purpose of the study was to determine the genetic

APA, Harvard, Vancouver, ISO, and other styles

3

Colyn, Robin. "Optimising camera trap density and position to determine medium and large mammal species richness and occupancy on the Cape Peninsula, South Africa." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2433.

Full text

Abstract:

Thesis (MTech (Nature Conservation))--Cape Peninsula University of Technology, 2016.<br>Largely due to anthropogenic causes, biodiversity and particularly species diversity is changing at an extraordinary rate, with declines in species abundance, community composition and extinction risk being of crucial concern. Monitoring of state variables of biodiversity such as species richness and occupancy are of significant importance in determining the severity of threats placed on species, populations and communities. As a non-invasive monitoring method camera traps are noted as being an effective, a

APA, Harvard, Vancouver, ISO, and other styles

4

Daniels, Savel R. (Savel Regan). "Systematics and population genetics of the South African freshwater crab fauna (Decapoda: Potamonautidae: Potamonautes)." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53078.

Full text

Abstract:

Thesis (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: In the present study, the systematic status, aspects of the evolutionary biology and phylogenetic relationships among species of the African freshwater crab genus Potamonautes in South Africa are examined. Systematic research between allopatric populations of P. brincki, using allozyme and morphometric data has revealed the existence of a new undescribed freshwater crab species occurring in mountain streams of the Cape Peninsula. This species is described in the present study. In addition, the diagnostic value of carapa

APA, Harvard, Vancouver, ISO, and other styles

5

Parker, Daniel Matthew. "The effects of elephants at low densities and after short occupation time on the ecosystems of the Eastern Cape Province, South Africa." Thesis, Rhodes University, 2008. http://eprints.ru.ac.za/1330/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Gough, Katie F. "Relatedness, social behaviour, and population dynamics of the elephants (Loxodonta africana) of Addo Elephant National Park, South Africa." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/3569.

Full text

Abstract:

This study presents an investigation into the population dynamics and social structure of a small, closed elephant population. Specifically, it examined population growth rates for evidence of density-dependent regulation. It also quantified the association patterns of female elephants groups, and male elephants groups. Social structure was examined using Hamilton’s kinship theories of inclusive fitness, and age. Male-female patterns of association were also examined for inbreeding avoidance behaviours. The study population was located in Addo Elephant National Park, South Africa. Density-depe

APA, Harvard, Vancouver, ISO, and other styles

7

Smith, Emma Ruth. "An assessment of caracal population density and human-predator conflict in the Winterberg, Eastern Cape, South Africa." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005326.

Full text

Abstract:

Human-wildlife conflict frequently involves carnivores, mainly because of their large home ranges and dietary requirements. As such, carnivores tend to be the first animals to be lost in human-dominated ecosystems. This is significant because the removal of carnivores can alter the functionality of ecosystems. However, the conservation of carnivores depends as much on the socio-political and socio-economic landscapes as it does on the ecological one. The consolidation of vast, un-fragmented conservation areas in Africa and the world is unlikely. Thus, unravelling the factors (both biological a

APA, Harvard, Vancouver, ISO, and other styles

8

Teske, Peter R. (Peter Rodja). "Population genetics and phylogenetic placement of the endangered Knysna seahorse, Hippocampus capensis." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53553.

Full text

Abstract:

Thesis (PhD)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: The aims of this study were to investigate genetic issues pertaining to the conservation of the Knysna seahorse, Hippocampus capensis, and to determine the phylogenetic placement of this endangered estuarine species among marine seahorses. This was accomplished by focusing on three aspects of the taxonomy: the interspecific level; the inter-population level; and the intra-population level. To determine which species are closely related to H. capensis, and how the evolutionary history of this lineage relates to that of oth

APA, Harvard, Vancouver, ISO, and other styles

9

Nhleko, Zoliswa Nombulelo. "The demography, spatial ecology and reproductive success of the black rhinoceros, Diceros bicornis, in Hluhluwe-iMfolozi Park, Kwazulu-Natal, South Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1011825.

Full text

Abstract:

Black rhinoceroses (Diceros bicornis) are endangered; there are only ~5000 individuals remaining worldwide. Consequently, black rhinos are managed as a metapopulation in southern Africa. This means that even though several sub-populations of black rhinos are geographically separated, they are managed as a single population. This is achieved by interchanging genetic material between the sub-populations. The main aim of the metapopulation management approach is to increase black rhino numbers in the sub-region. The Rhino Management Group (RMG), formed in 1989, was tasked with setting scientifica

APA, Harvard, Vancouver, ISO, and other styles

10

Ellis, Amanda Morgan. "An assessment of density estimation methods for forest ungulates." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1007830.

Full text

Abstract:

The development of conservation and management programs for an animal population relies on a knowledge of the number of individuals in an area. In order to achieve reliable estimates, precise and accurate techniques for estimating population densities are needed. This study compared the use of direct and indirect methods of estimating kudu (Trage/aphus strepsiceras), bush buck (Trage/aphus scriptus), common duiker (Sy/vicapra grimmia), and blue duiker (Philantamba manticala) densities on Shamwari Game Reserve in the Eastern Cape Province, South Africa. These species prefer habitats of dense fo

APA, Harvard, Vancouver, ISO, and other styles

11

Beukes, Barend Otto. "Demographic characteristics of lion (Panthera leo) in the Kalahari Gemsbok National Park." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2346.

Full text

Abstract:

Thesis (MTech (Nature Conservation))--Cape Peninsula University of Technology, 2016.<br>Lions are threatened across their natural range. The Kgalagadi Transfrontier Park (KTP), comprising the Kalahari Gemsbok National Park (KGNP; South Africa) and Gemsbok National Park (GNP; Botswana), is a stronghold for the species. Population size and demography of lions in the KGNP has been addressed in four historic studies. Studies in mid-1970 and 1990 reported a female biased population whereas in 2010 the sex structure was skewed towards males (56%). The bias in sex ratios towards males was first obser

APA, Harvard, Vancouver, ISO, and other styles

12

Mann, Gareth. "Aspects of the ecology of leopards (Panthera Pardus) in the Little Karoo, South Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1012241.

Full text

Abstract:

Leopards (Panthera pardus) are the most common large predators, free roaming outside of protected areas across most of South Africa. Leopard persistence is attributed to their tolerance of rugged terrain that is subject to less development pressure, as well as their cryptic behaviour. Nevertheless, existing leopard populations are threatened indirectly by ongoing transformation of natural habitat and directly through hunting and conflict with livestock farmers. Together these threats may further isolate leopards to fragmented areas of core natural habitat. I studied leopard habitat preferences

APA, Harvard, Vancouver, ISO, and other styles

13

Watermeyer, Jessica Patricia. "Anthropogenic threats to resident and dispersing African wild dogs west and south of the Kruger National Park, South Africa." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005318.

Full text

Abstract:

African wild dog Lycaon pictus populations are declining and the species is listed as Endangered by the IUCN. The Kruger National Park (KNP) is home to the only viable population of wild dogs in South Africa, but census results reveal consistently low numbers since the late 1990s. Wild dogs display wide-ranging behaviour and it is possible that the species might frequently use unprotected lands adjacent to the KNP. However, very little is known about wild dog movements beyond the boundaries of the KNP, and whether or not adjacent land owners are tolerant of the species. Significantly, threats

APA, Harvard, Vancouver, ISO, and other styles

14

Dyer, Siobhan Margaret. "Population size, demography and spatial ecology of cheetahs in the Timbavati Private Nature Reserve, South Africa." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002058.

Full text

Abstract:

The cheetah (Acinonyx jubatus) has experienced a drastic decline in numbers over the last 20 years globally and is currently listed as vulnerable by the International Union for the Conservation of Nature (IUCN). In South Africa, there are only an estimated 763 free-ranging cheetahs and conflict with humans is arguably the most significant reason for this low number. The aim of my study was to determine the population size and demographic characteristics of the cheetah population within the Timbavati Private Nature Reserve (TPNR), South Africa, and to contribute to a better understanding of che

APA, Harvard, Vancouver, ISO, and other styles

15

Blake, Justin David. "The ichthyofauna and piscivorous avifauna in a small temporarily open/closed Eastern Cape estuary, South Africa." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005395.

Full text

Abstract:

The spatial and temporal patterns in selected components of the ichthyofauna and piscivorous avifauna in the small temporarily open/closed Riet River Estuary located on the eastern seaboard of southern Africa was investigated monthly over the period August 2005 to July 2006. The ichthyofauna within the littoral zone of the estuary was sampled using a 5 m seine net (8 stations) while a 30 m seine net (4 stations) was employed to sample the fish in the channel. Bird counts were made along repeat transects along the length of the estuary. Total ichthyofaunal abundances and biomass ranged between

APA, Harvard, Vancouver, ISO, and other styles

16

Kok, Armand du Preez. "Small mammal communities at high altitude within the Sneeuberg Mountain complex, Eastern Cape Province, South Africa." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005454.

Full text

Abstract:

Due to their widespread and specious nature, small mammals are ideal for biogeographical studies. Small mammals also effectively connect various trophic levels by being both consumers and prey items for other animals. The Great Escarpment is the dominant mountain landscape in South Africa. Yet, very little small mammal research has been conducted on the Great Escarpment outside of the Main Drakensberg Mountains. This is surprising given the importance of mountains in shaping regional ecology. In this study, I assessed the diversity and community composition of small mammals at three high altit

APA, Harvard, Vancouver, ISO, and other styles

17

McManus, Jeannine Stephanie. "The spatial ecology and activity patterns of leopards (Panthera pardus) in the Baviaanskloof and Greater Addo Elephant National Park (GAENP), Eastern Cape Province, South Africa." Thesis, Rhodes University, 2009. http://hdl.handle.net/10962/d1007601.

Full text

Abstract:

The conservation of leopards in the Eastern Cape Province requires a holistic approach that considers both predator-human interactions as well as the biology of the carnivore. Numerous studies have been conducted on leopards within protected areas; however more information regarding the species is needed outside these areas to facilitate effective management of predators. The spatial ecology of the leopard (Panthera pardus) were studied in the Baviaanskloof and GAENP in the Eastern Cape. The Baviaanskloof is an extensive area of mountainous terrain (approximately 2665km²) which has a mosaic of

APA, Harvard, Vancouver, ISO, and other styles

18

Smith, Richardt John. "Development of a habitat suitability model to determine the potential distribution of Klipspringer (Oreotragus Oreotragus subsp. Oreotragus) in Table Mountain National Park." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2028.

Full text

Abstract:

Thesis (MTech (Nature Conservation))--Cape Peninsula University of Technology, 2015.<br>The klipspringer (Oreotragus oreotragus subsp. oreotragus) population became extinct on the Cape Peninsula in 1930. Being re-introduced into Table Mountain National Park (TMNP) in 1999 it became one of the species of special conservation concern to monitor in the Park. Most klipspringer territories are known by Park management but the distribution of all potentially suitable habitats for this species in the Park is not known. The main aim of this study is to produce a distribution range map that is represen

APA, Harvard, Vancouver, ISO, and other styles

19

Reilly, Brian Kevin. "The statistics of helicopter total counts of large ungulates in sourish mixed bushveld, northwest arid bushveld and mopane veld, Republic of South Africa." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/52027.

Full text

Abstract:

Dissertation (PhD)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: The use of helicopters has become almost universally accepted as the method of choice in the enumeration of large ungulates in Southern Africa. In most cases decisions affecting management of these populations are made based on a single count result. In all these instances the within technique variance is ignored, often leading to decisions based on type I or type II statistical errors where the within technique variance is misconstrued as the population change. Many studies have investigated the issue of accuracy o

APA, Harvard, Vancouver, ISO, and other styles

20

Solomon, Mariaan. "The relative performance of surrogate measures for viable populations." Diss., Pretoria : [s.n.], 2000. http://upetd.up.ac.za/thesis/available/etd-12062006-130505/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Junkuhn, Kyle Peter. "The role of seasonality, environmental correlates and edge effects on the diversity and abundance of small mammals in Afromontane forest patches, Eastern Cape, South Africa." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018188.

Full text

Abstract:

The Eastern Cape contains the majority of the remaining forested areas in South Africa (95.8 percent Coastal forests and 47.6 percent Afromontane forests), however these occur in fragments. Due to the rapid rise in the human population and its needs, conversion of forests to agricultural land and the extraction of timber increases, natural vegetation are lost and this therefore leads to forests becoming fragmented into small forest patches. One of the main consequences of forest fragmentation is loss of contiguous habitat, which is the dominant threat to species globally as it negatively affec

APA, Harvard, Vancouver, ISO, and other styles

22

Herrmann, Eric. "Modelling the effect of human-caused mortality on a lion sub-population using spreadsheets." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50025.

Full text

Abstract:

Thesis (MScFor)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Free-ranging lions (Panthera leo) in the Kgalagadi Transfrontier Park (KTP) have been subject to persecution by farmers following livestock depredation in adjacent grazing areas. In recent years at least one adult female was killed annually from a sub-population of five boundary prides that have home ranges adjoining these livestock grazing areas. While no long-term records of human-caused mortality are available, the impact of current rates of human-caused mortality is uncertain. Female-based, age-structured models

APA, Harvard, Vancouver, ISO, and other styles

23

Zimmerman, David Edwin. "The occurrence of piroplasms in various South African black rhinoceros (Diceros bicornis) populations." Pretoria : [s.n.], 2010. http://upetd.up.ac.za/thesis/available/etd-03022010-182115/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Pieters, Anelle. "Genetic characterization of commercial goat populations in South Africa." Diss., University of Pretoria, 2007. http://hdl.handle.net/2263/26788.

Full text

Abstract:

A genetic study of four commercial goat breeds in South Africa was performed using microsatellite markers. The commercial breeds included the Boer goat, Savanna, Kalahari Red and the Angora goat. Indigenous goat populations from Delftzijl and Groblersdal were also included in this study. Seventeen microsatellite markers were tested to determine the genetic variation. Genetic variation within the breeds were relatively high with heterozygosity values ranging from 57% for the Boer goat, 68% for the Kalahari Red, 69% for the Savanna goats and 70% for the Angora goats. First values indicated that

APA, Harvard, Vancouver, ISO, and other styles

25

Tucek, Jenny Bianka. "Comparison of the population growth potential of South African loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/5032.

Full text

Abstract:

A beach conservation programme protecting nesting loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles in South Africa was started in 1963. As initial numbers of nesting females were low for both species (107 loggerheads and 24 leatherbacks) it was proposed that the protection of eggs, hatchlings and nesting females along the nesting beach would induce population growth and prohibit local extinction. Today, 50 years later, the loggerhead population exceeds 650 females per annum, whereas the leatherback population counts about 65 nesting females per year. The trend fo

APA, Harvard, Vancouver, ISO, and other styles

26

Hopkins, Samantha. "Chytridiomycosis in amphibian populations in the Western Cape, South Africa." Thesis, University of the Western Cape, 2002. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7137_1359702947.

Full text

Abstract:

<p>There have been many cases reported of amphibian populations declining. These are often due to anthropogenic factors such as habitat destruction and pollution. However, some eclines have not had an obvious cause and many of these have been investigated and found to be due to pathogenic disease. Batrachochytrium dendrobatidis is a recently described pathogen of frogs. The population declines that have been associated with chytridiomycosis have occurred in relatively undisturbed areas such as national parks. The declines tend to occur at higher altitudes or in colder climates. This is thought

APA, Harvard, Vancouver, ISO, and other styles

27

Van, Marle-Koster Este. "Genetic and phenotypic characterization of native fowl populations in South Africa." Thesis, Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-08192008-124216.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Kraai, Manqhai. "White rhinoceros populations in the Eastern Cape: distribution, performance and diet." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1297.

Full text

Abstract:

White rhino populations did not occur historically in the Eastern Cape, South Africa (Skead 2007). They have, however, been introduced into a number of reserves within the Eastern Cape for reasons such as conservation, ecotourism and hunting. Based on the literature on the species, it was hypothesized that white rhinoceros would have been introduced in grass-rich habitats, as they are bulk grazers. White rhinoceros populations were further assessed in terms of population establishment by outlining their distribution and performance since introductions and this was done by extracting intercalvi

APA, Harvard, Vancouver, ISO, and other styles

29

Ndzipa, Victoria. "Synchronisation of breeding in populations of the brown mussel Perna perna on the South Coast of South Africa." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1007857.

Full text

Abstract:

The general biology and seasonality of breeding of intertidal populations of the brown mussel Perna perna in South Africa are reasonably well known, but we have little information on variability either within or among populations. Synchronous spawning offers adaptive advantages to externally breeding animals. Firstly, it enhances fertilization rates and therefore the species' reproductive fitness. Secondly, spawning can also be timed to coincide with environmental conditions conducive to larval settlement and development. In addition, synchronisation of spawning will influence the synchrony of

APA, Harvard, Vancouver, ISO, and other styles

30

Thomas, Brittany L., and University of Lethbridge Faculty of Arts and Science. "Population density, spatial dynamics and territoriality in vervet monkeys." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Psychology, c2013, 2013. http://hdl.handle.net/10133/3456.

Full text

Abstract:

Vervet monkeys (Chlorocebus pygerythrus) are generally described as a territorial species, though variations in territoriality have been observed. This research examined the impact of high population density, large group sizes and extensively overlapping home ranges on the expression of territoriality in a population of vervet monkeys. Over a period of eighteen months, data were collected on three large troops of vervet monkeys (PTN = 31, RBMN = 39, RSTN = 57) on the Samara Game Reserve, South Africa. I examined the spatial dynamics demonstrated in this population, assed the extent and use of

APA, Harvard, Vancouver, ISO, and other styles

31

Adams, Leanne. "Animal welfare in South Africa : a multi-component programme design." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15565.

Full text

Abstract:

The ongoing international atrocity of animal abuse is a persistent and widespread social problem within human society. The maltreatment of animals, particularly in rural impoverished contexts in South Africa continues to be a pertinent challenge facing local animal welfare organisations. Upon identifying the need to improve the conditions of animals living in the Darling community, the Swartland SPCA approached the evaluator in order to design a plausible humane education programme. The evaluator began this research by reviewing the history and underlying principles of humane education, the ef

APA, Harvard, Vancouver, ISO, and other styles

32

Gerber, Jaclyn. "Cytochrome P450 polymorphisms : relevance in two South African disease populations." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53345.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: With knowledge of the human genome increasing constantly we are continually faced with new and potentially groundbreaking methods for managing, treating and/or identifying diseases and predisposition to diseases and conditions at a genetic level. The human cytochrome P450 (CYP) super-family of genes code for enzymes that can participate in metabolism of drugs and foreign chemicals and in steroid synthesis and metabolism. Mutations in these genes may contribute to clinically relevant diseases. In this study, the effects of

APA, Harvard, Vancouver, ISO, and other styles

33

Escobar-Porras, Jessica. "Movement patterns and population dynamics of four catsharks endemic to South Africa." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005148.

Full text

Abstract:

Sharks are particularly vulnerable to over-exploitation. Although catsharks are an important component of the near-shore marine biodiversity in South Africa and most of the species are endemic, little is known about their movement patterns, home range and population size. With an increasing number of recreational fishers this information is crucial for their conservation. The aims of this study were threefold. Firstly, to identify and analyze existing data sources on movement patterns and population dynamics for four catshark species: pyjama (Poroderma africanum), leopard (P. pantherinum), puf

APA, Harvard, Vancouver, ISO, and other styles

34

Terblanche, Jonathan Steed. "A familial comparison of hypoxic sensitivity in two South-African populations." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/70079.

Full text

Abstract:

Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Chapter 1 presents a general literature review on the acute isocapnic hypoxic ventilatory response (HVR). The main findings from Chapter 2 indicate that our modified breathing circuit effectively measured the HVR while maintaining isocapnia. The measured ventilatory variables changed significantly with repeated short-term exposure to hypoxia over a 30-minute period, and the within- and between-day variability did not differ significantly. Furthermore, the variability in the HVR response (as measured by the coefficient of

APA, Harvard, Vancouver, ISO, and other styles

35

Gama, Phumelele Thuthuka. "Phytoplankton chlorophyll a concentration and community structure in two temporarily open/closed estuaries in the Eastern Cape, South Africa." Thesis, Nelson Mandela Metropolitan University, 2008. http://hdl.handle.net/10948/707.

Full text

Abstract:

River flow is important in controlling phytoplankton distribution in estuaries. Data on the effect of river inflow on phytoplankton distribution patterns in temporarily open/closed estuaries is lacking. This study investigated the influence of river inflow on size-fractionated phytoplankton biomass (Chl a), community composition and environmental parameters measured monthly over three years in two temporarily open/closed estuaries in the Eastern Cape, South Africa. A once-off primary production study over an annual cycle was completed in the Van Stadens and Maitland estuaries. The study monito

APA, Harvard, Vancouver, ISO, and other styles

36

MacFadyen, Duncan Neil. "The dynamics of small mammal populations in Rocky Highveld Grassland, Telperion, South Africa." Thesis, University of Pretoria, 2014. http://hdl.handle.net/2263/79273.

Full text

Abstract:

The present study investigates trap success, species richness, community structure, capture-recapture ratios, sex, population estimates, climatic effects, diversity, age structure, signs of reproduction, and seasonal changes in the body biomass in seven broad vegetation communities in the Bankenveld Grasslands of Telperion in Mpumalanga Province, and Ezemvelo Nature Reserve in Gauteng Province, South Africa. This study focuses on the effect of past management influences on diversity and abundance. The mean trap success recorded for the study is 8.6%. The Rocky Open Shrub community had the high

APA, Harvard, Vancouver, ISO, and other styles

37

Debeila, Thipe Jan. "Characterisation of selected Culicoides (Diptera : Ceratopogonidae) populations in South Africa using genetic markers." Diss., University of Pretoria, 2010. http://hdl.handle.net/2263/25696.

Full text

Abstract:

Culicoides (Diptera: Ceratopogonidae) are small (<3mm) blood feeding flies. These flies are biological vectors of viruses, protozoa and filarial nematodes affecting birds, humans, and other animals. Among the viruses transmitted those causing bluetongue (BT), African horse sickness (AHS) and epizootic haemorrhagic disease (EHD) are of major veterinary significance. Culicoides (Avaritia) imicola Kieffer, a proven vector of both AHS and BT viruses, is the most abundant and wide spread livestock-associated Culicoides species in South Africa. Field isolations of virus and oral susceptibility studi

APA, Harvard, Vancouver, ISO, and other styles

38

Werely, Cedric J. "Pharmacogenetics of Arylamine N-acetyltransferase genes in South African populations." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71832.

Full text

Abstract:

Thesis (PhD)--Stellenbosch University, 2012.<br>Includes bibliography<br>ENGLISH ABSTRACT: Tuberculosis (TB) has been declared a global health emergency by the World Health Organisation, and consequently there is an urgency to develop improved methods of diagnosis and treatment. Despite the current TB epidemic, the disease can be treated effectively using isoniazid (INH) in combination with other antibiotics. However, INH is inactivated in the body by certain drug metabolising enzymes, which may reduce the efficacy of TB treatment. The activity of these drug metabolising enzymes, called NAT, a

APA, Harvard, Vancouver, ISO, and other styles

39

Cowley, Paul D. (Paul Denfer) 1964. "Fish population dynamics in a temporarily open/closed South African estuary." Thesis, Rhodes University, 1999. http://hdl.handle.net/10962/d1008543.

Full text

Abstract:

The primary aim of this study was to investigate the population dynamics of the fishes associated with a small (17.5 hectares) temporarily open/closed estuary on the south east coast of South Africa. The results are based on the findings of an intensive sampling programme conducted over a period of four years in the East Kleinemonde estuary (33° 32' S : 27° 03' E). By adopting a quantitative approach, this study addresses the need for information on estuarine-associated fish population sizes, standing stock (biomass) estimates and productivity. The ichthyoplankton assemblage in the surf zone a

APA, Harvard, Vancouver, ISO, and other styles

40

Manjengwa, George Munyaradzi. "Animal traction and small-scale farming : a Stellenbosch case study." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6542.

Full text

Abstract:

Thesis (MPhil)--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: The main aim of this case study was to research the impact of the introduction of oxen for draught power on Eric Swarts’ Stellenbosch farm. The research objectives were designed to find out if the oxen helped to improve the quality of the soil, to determine their cost-effectiveness (compared to a tractor) and other social and managerial constraints and benefits associated with using them and also to make recommendations for small-scale farmers in developing countries. The literature review revealed that human soc

APA, Harvard, Vancouver, ISO, and other styles

41

Griffiths, Marc H. "Aspects of the biology and population dynamics of the geelbek Atractoscion aequidens (Cuvier) (Pisces: Sciaenidae) off the South African coast." Thesis, Rhodes University, 1988. http://hdl.handle.net/10962/d1001970.

Full text

Abstract:

The geelbek Atractoscion aeguidens is an important commercial and recreational linefish species along the South African eastern seaboard . Aspects of its biology and population dynamics were investigated using data collected from various sampling sites along the South African east coast and from catch statistics obtained from both the Sea Fisheries Research Institute (Cape Town), and dealer records. The biological aspects studied included age and growth, reproduction and feeding. It was established that A. aeguidens is a fast growing species with a relatively late age at sexual maturity and a

APA, Harvard, Vancouver, ISO, and other styles

42

Barnardo, Nadia. "Sustainable harvesting of wild populations of Cyclopia intermedia in Kouga, Eastern Cape, South Africa." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020195.

Full text

Abstract:

Cyclopia intermedia E. Mey is harvested from the wild to produce honeybush tea. The presence of a lignotuber and its slow growth seems to hinder the cultivation of this species and wild harvesting is likely to continue. Species distribution modelling indicated that C. intermedia has a climate envelope that spans from the Eastern Cape to the Western Cape along the Cape Fold mountains. This regional distribution is threatened under future climate change scenarios with a range loss and shift identified for climate conditions predicted for 2050. More specifically, its niche was identified as south

APA, Harvard, Vancouver, ISO, and other styles

43

Manchidi, M. J. "An evaluation of small-scale piggeries in Limpopo Province, South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/4072.

Full text

Abstract:

Thesis (MPhil (Animal Sciences. Livestock Industry Management: Pig Science))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: This mini-thesis describes the pig industry in South Africa which consists of a commercial intensive sector and an extensive sector that is also known as the small scale sector. Challenges in such as, marketing, feed, housing and genetics of small scale farmers are discussed. The objective of this study is to identify the problems experienced by the emerging/small scale pig farmers and to benchmark the production parameters of these farmers. Data was collecte

APA, Harvard, Vancouver, ISO, and other styles

44

Van, Zyl Carika Sylvia. "The use of a Roving Creel Survey to monitor exploited coastal fish species in the Goukamma Marine Ptrotected Area, South Africa." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1348.

Full text

Abstract:

A fishery-dependant monitoring method of the recreational shore-based fishery was undertaken in the Goukamma Marine Protected Area (MPA) on the south coast of South Africa for a period of 17 months. The method used was a roving creel survey (RCS), with dates, times and starting locations chosen by stratified random sampling. The MPA was divided into two sections, Buffalo Bay and Groenvlei, and all anglers encountered were interviewed. Catch and effort data were collected and catch per unit effort (CPUE) was calculated from this. The spatial distribution of anglers was also mapped. A generalize

APA, Harvard, Vancouver, ISO, and other styles

45

Rump, Samantha. "Reflective accounts of childhood inter-species experiences in a Southern-African context: a phenomenological-hermeneutic exploration." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1002554.

Full text

Abstract:

The aims of this research were to describe in rich phenomenological detail the recollected childhood experiences described by three South African adults of growing up with animals in the context of a traditionally African cultural perspective in South Africa; as well as to document the emotional, physical and social effects of inter-species relationships as described by these participants, in order to explore and situate these experiences in relation to broad international perspectives on the contribution of animals to human development. The question of how these described experiences correlat

APA, Harvard, Vancouver, ISO, and other styles

46

Sachikonye, Mwazvita Tapiwa Beatrice. "Natural resource use as a coping and adaptation strategy to floods of vulnerable populations in the Eastern Cape." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018194.

Full text

Abstract:

Many of the anticipated increased occurances of natural hazards are not only a consequence of climate change, but rather of rapid and widespread land cover change and the subsequent loss of the buffering capacity provided by healthy ecosystems against natural hazards. Unplanned and unmanaged developments in informal settlements limit government’s ability to mitigate and manage, pointing towards natural resources as being integral for vulnerable communities in developing countries to cope with and mitigate flood disasters. There is a lack of understanding on how natural resources contribute to

APA, Harvard, Vancouver, ISO, and other styles

47

Zimmerman, David Edwin. "The occurrence of piroplasms in various South African black rhinoceros (Diceros bicornis) populations." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/22938.

Full text

Abstract:

Between November 2002 and October 2006, blood samples were collected from 46 black rhinoceroses (Diceros bicornis) originating from various national parks and game reserves within South Africa. The samples were divided into two groups, based on the black rhinoceros subspecies from which they originated: twenty-eight (n = 28) of the samples originated from subspecies D. b. bicornis, and eighteen (n = 18) from subspecies D. b. minor. DNA was extracted; the V4 hypervariable region of the 18S rRNA gene amplified and subjected to the Reverse Line Blot (RLB) hybridization assay. The RLB results demo

APA, Harvard, Vancouver, ISO, and other styles

48

Sung, Yik-hei, and 宋亦希. "Impacts of illegal trapping and plantation forestry on herpetofaunal populations." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48199308.

Full text

Abstract:

Globally, as many as 30% of amphibians and 23% of reptile species are threatened and require urgent conservation action. The major threats are primarily caused by anthropogenic activities. This research aimed to investigate the impacts of two anthropogenic threats, over-exploitation and habitat changes on herpetofaunal populations in Hong Kong. Platysternon megacephalum has been heavily depleted because of severe hunting pressure for the food and pet trades. Low densities of individuals and few remaining intact populations have limited our ability to study their ecology. I conducted mark-

APA, Harvard, Vancouver, ISO, and other styles

49

Nicholson, Gareth Hurst. "Towards understanding the effects of stocking density on farmed South African abalone, Haliotis Midae." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1015646.

Full text

Abstract:

The profitability of abalone farms is heavily influenced by their production per unit of grow-out space. With farms having physically expanded to the maximum, and with increasing production costs, one of the most realistic ways for farms to increase their production is through optimizing stocking densities. The effect of stocking density on Haliotis midae performance is undocumented and optimal stocking densities for this species have not been determined. Experiments were conducted under farm conditions to investigate the effects of four different stocking densities (16 %, 20 %, 22 % and 24 %

APA, Harvard, Vancouver, ISO, and other styles

50

Stefanus, Titania Vaida. "A case study of factors impacting on marketing of South African fish oil in the animal feed market." Thesis, Peninsula Technikon, 2002. http://hdl.handle.net/20.500.11838/1020.

Full text

Abstract:

Thesis (MTech (Business Administration))--Peninsula Technikon, Cape Town, 2002<br>The growing and declining demand of the different fish oil application markets. The price of heavy furnace oil compared to fish oil selling price. (Heavy furnace oil is used to generate energy) . The research also investigated the impact of low price fish oil substitutes on the South African fish oil producers. The most important substitute in the current South African majority market, the animal feed market, is vegetable oils. The research finding is that the South African fish oil producers must follow

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!