Henning Winker

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Development of a model for optimum economic use of inland fisheries.

Motivation:
Globally, common carp, Cyprinus carpio, is one of the most widely introduced fish species. The life-history traits of carp conform to those predicted for typical successful invaders, so that adverse ecological disruptions are commonplace following carp translocations. On the other hand, carp may significantly contribute to the yield in capture and recreational fisheries and can therefore contribute to food security and tourism, development priorities of South Africa’s rural areas.
Aim:
To provide an assessment of the impact and resource potential of common carp by:
Developing new models to standardise and accurately access catch rates, effort and total yield for common carp by area and sector  (recreational/subsistence);
Understand the biology and population dynamics of common carp;
Comparing life history strategies of common carp and the endemic species, Mudfish Labeo capensis and smallmouth yellowfish Labeobarbus  aeneus; 
Applying meta-analysis to assess the post-impoundment trends of endemic large cyprinids compared to alien carp;
Describing the lake food web dynamics using stable isotope analysis of nitrogen and carbon.

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