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66 Research products, page 1 of 7

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  • Open Access
    Authors: 
    Masuku, Bianca; Willmers, Michelle;
    Publisher: Digital Open Textbooks for Development
    Country: South Africa

    This is a workshop presentation by Digital Open Textbooks for Development (DOT4D) initiative members Michelle Willmers and Bianca Masuku at the SASUF Goes Digital Workshop in September 2022. This interactive session provided an overview of open textbook development approaches, focusing on sustainability and collaboration. The workshop session also drew attention to the capacity building and support required at an institutional level to support this work as part of institutional transformation efforts to address social injustice in higher education. This workshop was organized by the SASUF-funded Open Education for Social Justice initiative and was presented in partnership with collaborators from University West and University of Gothenburg.

  • Open Access
    Authors: 
    Masuku, Bianca; Cox, Glenda;
    Publisher: Digital Open Textbooks for Development
    Country: South Africa

    This is a presentation that was given by the DOT4D team as part of the CHED seminar series in June 2022. The presentation demonstrates how academics at UCT are embarking on open textbook initiatives in response to a largely mutual set of social injustices they witness in their classrooms related to affordable access, curriculum transformation and multilingualism. With a focus on student co-creation and inclusion, it presents models that address social (in)justice in the classroom and explores ways in which institutions can address sustainability in order to support open textbook development activity.

  • Open Access
    Authors: 
    Butterworth, Doug; Rademeyer, Rebecca A;
    Publisher: University of Cape Town
    Country: South Africa

    A concern associated with existing Atlantic bluefin tuna age-based assessments using Virtual Population Analysis (VPA) is that the catch-at-age data inputs are obtained by the cohort-slicing method, which is approximate and might introduce appreciable bias into the results. Current custom in such circumstances is rather to fit the assessment model directly to the basic catch-at-length data available, under the assumption of invariance of the distributions of length-at-age of the fish over time, with statistical models used to formulate the likelihoods maximized in the model fitting process. Initial results are presented for a process of comparing the 2012 ICCAT SCRS VPA assessment of the western stock with first a statistical catch-at-age assessment approach which also uses the same cohort sliced catch-at-age inputs, and then a statistical catch-at length method which fits instead to catch-at-length distributions.

  • Open Access
    Authors: 
    Naude, Vincent; Rogers, Toby D.; A. Kock, Alison; Jordaan, Gareth L.; Mann, Bruce Q.; O'Riain, M. Justin;
    Publisher: University of Cape Town
    Country: South Africa

    Context: Shark species that are targeted by recreational anglers and commercial fisheries are vulnerable to over exploitation when fishing effort is not informed or regulated by data on the relative distribution and growth of different age/size classes. Aims: We investigate the spatiotemporal distribution, movement patterns and growth rates of Carcharhinus brachyurus in southern Africa.  Methods: We analysed a 36-year cooperative shore-angling tag-recapture dataset. Key results: Distribution was centred in Namibia and the South Coast of South Africa during the austral summer. Large-scale regional movement of individual sharks (n = 21) supports the lack of population structure in southern African. The South Coast of South Africa represented a potentially important nursery region where 96% of all juveniles were tagged. Sub-adults and adults were more widely distributed and recorded significantly greater time at liberty than juveniles, but the distance moved for adults was significantly lower, indicating higher site fidelity. Growth model predictions showed annual growth rates of C. brachyurus were among the slowest when compared to other carcharhinids. Conclusions and implications: These slow life-history traits, affinity to coastal regions and cross-border movements leave the southern African C. brachyurus population vulnerable to overexploitation in the absence of regionally aligned research and management.

  • Open Access
    Authors: 
    Harper, Jack; van Wilgen, Nicola; Foden, Wendy;
    Publisher: University of Cape Town
    Country: South Africa

      Within this upload are datasets for the reptile and amphibian assessments, respectively. This data was collated to assess the climate change vulnerability of reptile and amphibians species found in Table Mountain National Park. Each of these datasets contains the following tabs of information: Trait criteria: The species traits for which data was collated, variables used to score each trait, and the vulnerability thresholds assigned to each trait. Expert weighting refers to the degree of relative importance a trait has on the sensitivity or adaptive capacity of a species when considered independently from the other traits. Data: Each of the species examined for each respective assessment, life history information for each trait and species, and sources for such information. References: The full reference for each life history data source.

  • Open Access
    Authors: 
    Simpson, Nick; Clarke, Joanne; Sabour, Salma; Orr, Scott;
    Publisher: University of Cape Town
    Country: South Africa

    This file is the online Supplementary Material to ICOMOS. 2022. White Paper 2: Impacts, vulnerability, and understanding risks of climate change for culture and heritage, Simpson, N.P. et al. (eds.), International Council on Monuments and Sites; Intergovernmental Panel on Climate Change; United Nations Educational, Scientific and Cultural Organization, ICOMOS: Paris. It lists the extended bibliography of uses and definitions of heritage and IPCC terms in the climate and heritage literactures considered by the authors of the White Paper

  • Open Access
    Authors: 
    de Moor, Carryn; Coetzee, Janet; Butterworth, Doug; van der Lingen, Carl;
    Publisher: University of Cape Town
    Country: South Africa

    Presentation to the Small Pelagic Scientific Working Group, Cape Town, 28 August 2014, 19pp, titled: 'A report back on discussions on "Some initial ideas for data required before the next assessments of sardine and anchovy".'

  • Open Access
    Authors: 
    Holden, Petra; Rebelo, Alanna J.; Wolski, Piotr; Odoulami, Romaric; Lawal, Kamoru Abiodun; Kimutai, Joyce; Nkemelang, Tiro; New, Mark;
    Publisher: University of Cape Town
    Country: South Africa

    Streamflow data in cumecs generated from running MIKE-SHE coupled with MIKE HYDRO River system to simulate the hydrological response of subcatchments to the four climate-Invasive Alien Tree (climate-IAT) states at a daily time step. See Holden et al 2022 for full details: Holden, P.B., Rebelo A.J., Wolski, P., Odoulami, R.C., Lawal, K.A., Kimutai J., Nkemelang, T. and New, M.G. (2022) Nature-based solutions in mountain catchments reduce impact of anthropogenic climate change on drought streamflow. Communications Earth & Environment. The biased corrected driving rainfall and reference evapotranspiration for the hydrological model are also included. The driving rainfall data is included as a separate column alongside the streamflow data. The driving reference evapotranspiration data is included as a separate csv. Example code for generating the QR%, % Change in Q and QR% point difference from the csv data provided is also included.

  • Other research product . Other ORP type . 2022
    Open Access
    Authors: 
    Marquard, Andrew; Winkler, Harald; Price, Penny; Tyler, Emily; Simpson, Nicolas; Trisos, Christopher; Britta, Rennkamp,;
    Publisher: University of Cape Town
    Country: South Africa

    Comments on the Climate Change Bill, submitted in May 2022 to the Parliamentary Portfolio Committee on Environment. Comments by researchers associated with UCT's African Climate and Development Initiative (ACDI).

  • Open Access
    Authors: 
    Butterworth, Doug;
    Publisher: University of Cape Town
    Country: South Africa

    1. Presentation to the University of Cape Town Summer School, Thursday 13 January 2022: 48pp, titled: "Why is fisheries management so difficult? Lecture 1 – The Basics". The basics of the scientific principles underlying fisheries management are explained by the use of financial analogies. The core concept of sustainability is illustrated by its correspondence to a pensioner having to live off the interest on investments and not delve into capital. The data typically available for fisheries analyses are summarised, with their weaknesses exposed. Then the basis of how such data are transformed to fishery catch limit recommendations is summarised, showing how sound advice (robust to uncertainties) can be developed, notwithstanding these data limitations. Finally, reference is made to a key recent scientific advance in the field (close-kin genetics), and a brief overview is provided of the status of fisheries management and fish stocks, both globally and in South Africa.

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