Ipasi lentloko

This exquisitely crafted headband features an intricate design made from carefully woven bead strings, showcasing a stunning colour palette of white, navy, and pink. It is commonly embraced by young men as a fashionable and culturally significant accessory. Specifically, this headband holds cultural significance within the abaThembu subcultural group of the isiXhosa-speaking community. Beyond its ornamental value, it serves as a meaningful symbol, representing important life milestones and traditional rites of passage within this cultural context.Purchased from Mrs Joan BrosterForms part of: Walter Sisulu University Beadwork Collectio

The rise of ‘violent non-state actors’ in South Africa: an analysis of the taxi industry in the Eastern Cape Province

This study investigated the rise of ‘violent-non state actors’ in South Africa, with specific focus on the taxi industry in the Eastern Cape Province. Contemporary South Africa has been a playground for violent non-state actors often evidenced by sporadic service delivery protests and gun violence in public spaces. Many authors attribute these to the failure of the state to provide public services such as security, water, employment, etc. Amongst these non-state actors, are taxi associations called mother-bodies. The deregulation of the taxi industry by the then apartheid government in 1987 resulted in the exponential inflow of previously oppressed black people into the taxi industry, which had now become the most accessible form of informal business for previously disadvantaged people. This resulted in the formation of many mother-bodies that subsequently became ‘law unto themselves’ due to the absence of formal state regulation amongst other things. Since then, violent conflicts amongst these mother bodies have become the order of the day. The study sought to determine the commuter’s perspectives about the taxi industry and violence in the Eastern Cape Province, to determine ways in which the taxi industry has challenged the monopoly of the state over the legitimate use of force and to explore the reasons why taxi violence has largely gone unchecked by the state. Part of the key findings of the study were that there is a general sense of fear and insecurity amongst commuters especially female commuters who use taxis. Various cases of sexual assault, intimidation and psychological traumas caused by exposure to violence amongst commuters have been reported. It has also been determined that in order to effectively challenge the monopoly of the state over the legitimate use force, some taxi operators have resorted to the use of self created laws to intimidate their competitors, use of mafia-like tactics, extortion and coercion amongst other things in order to impose monopoly over some lucrative routes, individuals and associations. In resolving some of these challenges, the study inter alia recommends for the formalization of the taxi industry by government, which will result in the subsidisation of the industry.Thesis (PhD) -- Faculty of Social Sciences and Humanities, 202

Co-occurrence of Sympatric Poroderma Species

Species exploiting similar ecological niches are expected to adapt their behaviour, which can either promote or hinder coexistence. This study examined the ecological (dis)similarity between the endemic Poroderma africanum (pyjama catshark) and Poroderma pantherinum (leopard catshark) in Mossel Bay, South Africa. The co-occurrence of these species was examined along the ecological axes of time, trophic position and space, between October 2015 and April 2018, through the use of Baited Remote Underwater Videos (BRUV), gastric lavage, and acoustic telemetry. Through the deployment of 197 BRUVs, P. africanum showed a seasonal, higher Relative Abundance (RA = 0.52), occurring more frequently during winter months, while showing an overall decline in RA over the course of the study period. Poroderma pantherinum on the other hand, showed a lower, unseasonal RA (0.20), remaining relatively stable throughout the study period. The BRUV deployments indicated that the two species showed a positive co-occurrence with one other, being sighted in BRUV deployments more frequently together as opposed to in isolation/at random. Acoustic telemetry indicated that the two species were active during different diel periods, influenced by a complex combination of tidal and diel rhythms, while P. pantherinum showed a higher residency compared to P. africanum (P. pantherinum: Continuous Residency Time (CRT)24 = 3.32 days (mean), 95% CI: 2.53–4.11 days; P. africanum: CRT24 = 2.01 days, 95% CI: 1.66–2.36 days). While the two species are sympatric in nature, and have an overlapping, endemic, distribution, acoustic telemetry indicated that 1 ABSTRACT P. africanum showed higher degrees of movement throughout the acoustic receiver array (P. africanum: edge density (ED) = 0.25; P. pantherinum: ED = 0.12); however, certain areas of the bay showed to be of high importance for both species. Both species revealed high levels of intra- and inter-specific variation in both residency and movement behaviour. Gastric lavage indicated partially overlapping trophic niches, between the two Poroderma spp. Poroderma africanum had a generalist diet, dominated by teleosts (Index of Relative Importance (IRI)% = 22.69), octopus (IRI% = 11.48) and discarded bait (IRI% = 64.54), while P. pantherinum showed indications of being a specialist predator, with a diet dominated by cephalopods (IRI% = 83.68). The two Poroderma spp. showed a partially overlapping, but separate trophic niches, while displaying spatial dissimilarity in diet. The study suggests that the two species are able to coexist within the same geographical area through niche differentiation across trophic and temporal ecological axes, with varying spatial use. The intra- and inter-specific differences between the two species may complicate elasmobranch management efforts for these co-occurring endemic catsharks, and as such, efforts should follow either an individual species approach, which is often not feasible, or an ecosystem-based approach, as opposed to considering the genus as a whole.Thesis (PhD) -- Faculty of Science, Ichthyology and Fisheries Science, 202

The right of non-unionised employees and minority unions to be consulted prior to dismissals based on operational requirements

The position of workers and trade unions has changed drastically since the introduction of a Constitutional dispensation in South Africa. The Constitution affords both workers and trade unions protectable rights and greater influence at the workplace. To vindicate and assert these rights trade unions and workers approach the courts to vindicate these rights. Section 23 of the Constitution deals with labour rights and section 18 gives effect to the right to freedom of association. To give content to these rights the Constitution provides that courts must have regard to international law. In the context of these rights, one of the principles recognised by the International Labour Organisation through its Conventions is the principle of majoritarianism. In short, the principle endeavours to give effect to the will of trade unions representing the majority of employees in a workplace in relation to trade unions that represent the minority. This is achieved through collective bargaining, which typically results in the conclusion of collective agreements, whereby trade unions are given exclusive and or preferential rights. In AMCU v Royal Bafokeng the Constitutional Court held that, the principle of majoritarianism applies to and finds expression in section 189 of the Labour Relations Act. The effect of this judgment is that members of a minority trade union may be represented by a rival majority trade union during the consultation process when an employer has contemplated dismissals based on operational requirements. The minority judgement adopted a different approach, reasoning that, the principle of majoritarianism ought not to find application in the context of dismissals based on operational requirements. It found that section 189 is intended to give effect to the Constitutional right to fair labour practices and must therefore allow a fair procedure that permits an employee to choose who may represent him/her in a consultation process prior to dismissal.Thesis (LLM) -- Faculty of Law, Department of Mercantile law, 202

Umbheka-phesheya

The smoking pipe is a beautifully crafted, elongated piece featuring intricate designs in shades of pink and navy. The pipe is adorned with delicate fringes of navy and pink beads on each side, adding to its elegant appearance. The filter is intricately connected to the pipe using two beaded strings, enhancing its ornate design. This type of pipe is traditionally used by adult females and is known as "umbheka-phesheya." Its design lets the owner enjoy smoking while inspecting nearby ploughing fields or gardens. The long, slender design and decorative elements make it a unique and culturally significant smoking accessory.Purchased from Mrs Joan BrosterForms part of: Walter Sisulu University Beadwork Collectio

Biotic resistance towards Hydrellia egeriae, a biological control agent for the aquatic weed Egeria densa, in South Africa

Egeria densa is a submerged aquatic weed that can grow into dense monocultures in rivers and dams in South Africa, which negatively affects ecosystem functioning and services. The biological control agent Hydrellia egeriae Rodrigues-Júnior (Diptera: Ephydridae) was first released against Egeria densa Planchon (Hydrocharitaceae) in South Africa in 2018. Biotic resistance in an introduced range can have negative impacts on the ability of a biological control agent to establish and exert top-down pressure. Dipteran and lepidopteran species that are used as biological control agents are often susceptible to higher levels of parasitism in their introduced range than biological control agents from other insect orders. In addition, ecological analogues that are present in South Africa, make H. egeriae particularly vulnerable to biotic resistance. Considering this, post-release surveys were conducted to investigate if native parasitoids will extend their host range to include H. egeriae. Chaenusa seminervata van Achterberg, C. anervata van Achterberg (Braconidae: Alysiinae: Dacnusini) and Ademon lagarosiphonae van Achterberg (Braconidae: Opiinae) were reared from field-collected H. egeriae pupae, within a year of its release. These braconid parasitoids were previously recorded from a native herbivore, Hydrellia lagarosiphon Deeming (Diptera: Ephydridae)

The demographic-specific prey preferences of lions and cheetahs, and potential impacts on prey populations

Understanding prey selection offers predictive insights into predator-prey interactions, which can be extended to explore the impacts of predators on prey populations. Prey availability and vulnerability vary across species, demographic classes, body sizes, and seasons. Traditional prey selection models for large carnivores, based on estimates of prey body size, assume uniform vulnerability across prey demographic classes and seasons, failing to account for these variations. This study aims to contrast seasonal shifts in demographic-specific prey preferences between lions and cheetahs and examine the potential impact of their demographic-specific predation patterns on a range of prey species across a body size spectrum. It was predicted that cheetahs would shift their selection from adults and juveniles of smaller prey species in the dry season to neonates and juveniles of both smaller and larger prey species in the wet season, while lions would select adults irrespective of the season. Additionally, predation focusing on adults would have a greater impact on prey populations compared to predation focusing on non-adults. Furthermore, it was predicted that prey populations experiencing demographic-specific selection from both lions and cheetahs would be impacted more than species selected by only one predator. Degrees of preference (DOP) were estimated based on prey availability (camera traps) and prey use (GPS clusters) for lion and cheetah populations in Lapalala Wilderness Reserve. Generalized Additive Models for Location, Scale, and Shape (GAMLSS) were used to determine seasonal shifts in demographic-specific prey preferences. The seasonal-demographic specific predation patterns of lion and cheetah, along with prey vital rates extracted from the literature, were then used to model potential predation impacts on prey populations using both Leslie-Usher and Lefkovitch matrix models. Lions preferred larger adult prey such as blue wildebeest, eland, and buffalo, while cheetahs preferred smaller prey, particularly juveniles of small to intermediate-sized species like impala, kudu, blue wildebeest, and zebra. Both predators showed seasonal shifts in demographic-specific prey preferences, with lions selecting adult buffalo during the dry season and juvenile buffalo in the wet season, and cheetahs selecting juveniles in the dry season and neonates and juveniles during the wet season. Lions and cheetahs exerted the highest degree of top-down limitations on their preferred prey. Predation on adult prey had a greater effect on prey population growth rates than predation on non-adults, especially in the dry season. Intermediate-sized prey species experienced the highest predation pressures, while larger prey species were more affected than smaller ones, contrary to the size-nested predation hypothesis. My study represents a first effort in the southern hemisphere to model the demographic impacts of multiple predators on diverse prey species, incorporating seasonal and demographic-specific prey preferences. The findings emphasise the importance of incorporating prey demographics and seasonality in predator-prey studies as these refined studies have implications for the management and conservation of both predator and prey populations.Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 202

Learners’ understanding of their linguistic resources as a basis for learning natural sciences

With eleven official languages, South Africa is known for its multilingual environment. Despite this, the country's educational system heavily favours English and Afrikaans. Despite the varied linguistic backgrounds of learners, English continues to be used as the Language of Learning and Teaching (LoLT), which raises questions regarding fair access to education. Within the context of South Africa's constitution and policy frameworks, particularly the Language in Education Policy (LiEP), this study aims to investigate how group work activities in a Natural Sciences classroom can give learners an opportunity to mobilise their multilingual repertoires. Three formerly Afrikaans-medium high schools in the Northern Areas of Gqeberha, were the sites for this research which focuses on Grade Nine Natural Sciences learners. Through the use of both quantitative and qualitative methods such as questionnaires, classroom observations, and focus groups, the study explores how learners make use of their language resources to navigate science instruction in English. The results contest the idea that languages are distinct entities and show that learners use language interchangeably as a learning tool, a practice known as translanguaging. Group work becomes an important space in which learners exercise agency in language selection, enabling the link of dialogical, multilingual, and cultural responses. Sociocultural theory offers insights into group work relationships and provides the theoretical foundation for understanding how learners use language to understand scientific topics. Building on Gibbons' mode continuum (2003), which maps the shifts in discourse in classroom contexts from every day talk at the “here and now” to more specialized talk, the study also explored an expanded continuum which aimed at clarifying the nuances of language and cognitive progression among learners working in collaborative groups. This study adds to the conversation about language ideologies by recognising the ideologies of inclusion, access and identity which informed learners’ thinking and attitudes to language choice in education. Thus, the study emphasises the importance of a sophisticated comprehension of multilingual repertoires in the classroom. In order to better accommodate the changing linguistic patterns of multilingual learners, the study recommends re-evaluating language policies and encouraging educators to exploit the potential of group work to develop understanding of scientific concepts.Thesis (DPhil) -- Faculty of Education, School of Post Graduate Education, 202

Preparation and Investigation of coumarin-based chemosensors towards sensing of ions using UV studies in aqueous systems

Humanity's unrelenting expansion has shown little regard for the environment, and this has resulted in tons of toxic heavy metal cations and anions being released into the environment through industrial, agricultural, electronic, and mining dumping. The release of these toxic heavy metals can cause diseases and sometimes lead to death, especially in third-world countries with low-income that reside in informal settlements, who suffer the most. Furthermore, the release of these toxins eventually finds their way back into the environment through bioaccumulation in fish, plants and animals. Although there is an ever need for the growth of these industries; low-cost, sensitive, selective, and organic-based sensors is a positive step forward in highlighting the need for environmental restoration and remediation, whilst striving to avoid unnecessary disease and death through this development. In this project, coumarin-based chemosensors for the detection of cationic and anionic species in aqueous and organic media are described. This project involves the synthesis of six different coumarin-based ether derivatives (E2-E5) and coumarin-based ester derivatives (H1-H2). FT-IR, 1H NMR and 13C NMR were used to confirm the structures of all sensors. The abilities of these novel compounds as chemosensors for detection of cations and anions were investigated using UV-vis analysis. These compounds displayed a favourable interaction with Fe2+ and Fe3+ ions with an increase in absorbance. Ether derivatives E2-E5 did not display any degree of selectivity or sensitivity towards the chosen anions. It was found that in the presence of FeCl2, sensors H1 and H2 displayed a degree of selectivities and further investigations were therefore carried out. From the titration experiments, the limit of detection, limit of quantification and association constants were determined. Job’s plot analyses were performed to determine the binding ratios, which was supported by Benesi-Hildebrand studies. The binding ratio between the sensors and metal cations during complexation was found to be 1:1. Reversibility studies were carried out using EDTA to determine whether the sensors could be reused. Molecular Modelling studies were used to determine the most preferred binding sites. Lastly, real-life application screenings were also run to determine if the sensors will be able to be used in real-life scenarios.Thesis (MSc) -- Faculty of Science, School of Biomolecular & Chemical Sciences, 202

Investigating playing-related musculoskeletal disorders in South African instrumental musicians

This study, one of the first studies in SA to investigate PRMD in a wideranging sample of instrumental musicians using a validated self-report tool, shows that PRMDs are highly prevalent among a range of SA musicians and have a considerably negative effect on musicians’ performance ability and quality of life. However, making inferences about most affected genre or instrumental group was challenging due to the small sample sizes in some categories. The results from this study confirm that the nature of PRMD development is indeed multi-factorial, with factors numerous individual and playing-related factors playing a role in the development of PRMDs in SA musicians. Better support and education on health promotion for musicians, including awareness of and prevention strategies for PRMDs in the SA context are needed which may reduce the prevalence of PRMDs.Thesis (MSc) -- Faculty of Science, Human Kinetics and Ergonomics, 202