A spatial perspective of the population structure and connectivity of two small tuna species, Katsuwonus pelamis (Skipjack tuna) and Euthynnus affinis (Kawakawa), in the Southwest Indian Ocean
- Authors: Taylor, Christopher John
- Date: 2024-10-11
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/467116 , vital:76816
- Description: Katsuwonus pelamis and Euthynnus affinis are two small tuna species of socio-economic and fisheries importance across the Southwest Indian Ocean (SWIO). There is currently a dearth of data and information around various aspects of their biology in the SWIO, including their population structure and connectivity. The availability of such data, including spatially represented biological data, has the potential to address current management discrepancies through the provision of more robust assessments into the stock structure and connectivity of these species and their stocks. This study explored a spatial perspective of the population structure and connectivity of K. pelamis and E. affinis fisheries in the SWIO to determine the suitability of current Indian Ocean Tuna Commission (IOTC) management measures for the species. It employed two primary data sources: a) Western Indian Ocean Marine Science Association’s (WIOMSA) Marine and Coastal Science for Management (MASMA) Project and b) IOTC. WIOMSA MASMA and IOTC data was collected throughout many countries and small island states in the SWIO, and pertained to genetic diversity, catch-weight, length-at-maturity, and morphometrics. Such data were combined and analysed to conduct geospatial analysis. Spatially illustrated genetic divergence, length-at-maturity, catch-weight, and morphometric data supported the presence of three reproductively isolated subpopulations of K. pelamis in the SWIO (Dar es Salaam, Tanzania, and Kenya; Mtwara, Tanzania, Mozambique, and Eastern Cape, South Africa; Seychelles). Only spatially depicted genetic divergence data, and morphometrics, supported that E. affinis populations were not panmictic in the SWIO, with genetic divergence data supporting the presence of three reproductively isolated subpopulations of E. affinis (Northern Mozambique and Kenya; Tanzania; Seychelles). Spatially illustrated length-at-maturity and catch-weight data however did not provide sufficient evidence supporting spatial structuring among E. affinis populations in the SWIO. Whilst the present analyses are not definitive to delineate exact stock boundaries, findings supported the contention of current IOTC management policy, indicating spatial population complexity for both species. Future research must increase representation of fishery independent samples and must investigate oceanographic variables driving potential stock separation to further support effective management reform. Until available, a precautionary approach should be adopted for the management of these species across the SWIO, considering the presently proposed distribution of their stocks separate for management. , Thesis (MSc) -- Faculty of Science, Ichthyology and Fisheries Science, 2024
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- Date Issued: 2024-10-11
A discourse analysis of media representation of women political leaders in Uganda
- Authors: Kemirembe, Grace
- Date: 2023-03-30
- Subjects: Discourse analysis , Media representation , Representation (Philosophy) , Women in mass media , Women politicians Uganda
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/408908 , vital:70536
- Description: This study is a qualitative desktop research project. The study employed a Feminist Critical Discourse Analysis to analyse and unpack the discursive ways in which female politicians are discussed and talked about in Ugandan online media. This study was a response to the realisation that online media portrayals of female politicians in Uganda remain largely unexplored. Additionally, the study discovered that the Daily Monitor and The Observer, the two newspapers that this thesis researched, often employ gender stereotypes and sexist coverage of female politicians in Uganda using personalisation, trivialisation and demonisation frames. The study illustrates that these misogynistic frames are intended to diminish women’s importance in the political sphere. Moreover, women who do not conform to the gender stereotypes are portrayed as social deviants. This work concludes that one of the challenges faced by women politicians in Uganda, and in Africa as a whole, is how to exploit online media’s productive capacity while, at the same time, resisting its use as an instrument that undermines them. Given the limited scope of the study using only two media organisations, future studies on media representation of female politicians could expand the range to include print and visual sources to provide generalisable results. , Thesis (MA) -- Faculty of Humanities, Political and International Studies, 2023
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- Date Issued: 2023-03-30
Inclusivity and access to amenity in the urban environment: the design of a student resource centre in central, Port Elizabeth
- Authors: Tshelametsi, Gorata
- Date: 2020-09
- Subjects: Urban ecology (Sociology) , Students -- Education
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/58639 , vital:59976
- Description: The increasing concern for sustainability in the 21st century has brought about new meanings for city processes, relations and the built environment. Typically, the environmental and economic aspects of the issue have received the most attention, leaving social sustainability largely neglected within the discourse. It could be argued however, that social sustainability is the key to many of the challenges faced by the South African post-apartheid cities. Using primary and secondary research method composed of a qualitative approach, involving site visits, photography and closed interviews, this study examines the nature of spatial segregation in the South African post-apartheid city in relation to Lefevbre’s ideas. Focusing on segregation, this investigation will discuss the forced removals that occurred in South Africa from the mid-1800s, through to the Apartheid Era in the late 1900s, and seek to gain insight into the manner in which these events have shaped the urban landscape of the South African cities. Port Elizabeth, known during apartheid as the Cradle of Black Resistance, was at the forefront of the political struggle in South Africa. For this reason, Port Elizabeth has been chosen for analysis. The site for intervention is the cities’ primary public transport interchange; the gateway into the wealthy southern suburbs from the northern township settlements. This is the point of connection between the divides of the city but is itself a highly disconnected environment. The findings indicate the integration of the existing on-site activities with the new proposed Student Resource Centre functions creates a mixed-use ribbon of activity. These connections facilitate the interaction between students living in the inner city. Through a holistic approach, the intervention seeks to bridge both physical and social barriers, towards a more integrated lived experience and socially sustainable future for Port Elizabeth. , Thesis (MA) -- Faculty - School of Architecture, 2020
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- Date Issued: 2020-09