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  1. A critical look at the potential of Ecopath with ecosim to assist in practical fisheries management

    A critical look at the potential of Ecopath with ecosim to assist in practical fisheries management

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: É. E. Plagányi D. S. Butterworth
    Ecosystem-orientated thinking is increasingly incorporated into fishery management. Given the complexity of ecosystem processes, there is a need to evaluate the tools used to steer this thinking critically. ECOPATH with ECOSIM (EwE), an aggregate system-modelling package, is currently the most...
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  2. Age structure or functional response? Reconciling the energetics of surplus production between single-species models and ECOSIM

    Age structure or functional response? Reconciling the energetics of surplus production between single-species models and ECOSIM

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K. Y. Aydin
    Whole-ecosystem foodweb models, specifically the dynamic model ECOSIM, contain specific hypotheses for surplus production that differ from traditional single-species management models. Specifically, ECOSIM begins with an assumption that all species are tightly connected and energetic surplus does not arise through...
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  3. Changes in the trophic structure of the southern Benguela before and after the onset of industrial fishing

    Changes in the trophic structure of the southern Benguela before and after the onset of industrial fishing

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KE Watermeyer LJ Shannon CL Griffiths
    Despite a human presence in the Benguela region for at least one million years, exploitation of marine resources by European seafarers only began in earnest in the 1400s. Ecopath with Ecosim was used to construct and compare mass-balanced foodweb models...
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  4. Changes in the trophic structure of the northern Benguela before and after the onset of industrial fishing

    Changes in the trophic structure of the northern Benguela before and after the onset of industrial fishing

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KE Watermeyer LJ Shannon J-P Roux CL Griffiths
    Exploitation of marine resources has been occurring in the northern Benguela ecosystem for centuries. Understanding the cumulative long-term effects of this exploitation is important toward effective management of the modern system. Retrospective mass-balanced models of the ecosystem have been constructed,...
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  5. Supporting marine spatial planning with an ecosystem model of Algoa Bay, South Africa

    Supporting marine spatial planning with an ecosystem model of Algoa Bay, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ortega-Cisneros --- , South Africa E Weigum --- , South Africa R Chalmers --- , South Africa S Grusd --- , South Africa AT Lombard --- , South Africa L Shannon --- , South Africa
    The Ecopath with Ecosim (EwE) modelling framework was used to develop a model of Algoa Bay and test the ecosystem impacts of the implementation of the Addo Elephant National Park Marine Protected Area (MPA). The Ecopath model included 37 functional...
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