Penguin model update: an improved penguin mortality relationship with sardine biomass and results of sensitivities to the base case
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2011
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University of Cape Town
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Abstract
Work on the penguin–fish interaction model has progressed to the point where a candidate base
case for Robben Island was presented in document FISHERIES/2011/SWG–PEL/40. However, one
concern there was that the likelihood could always be increased by increasing the value of the
power parameter n in the biomass–mortality relationship. This indicated that the functional form of
that relationship was perhaps not the most appropriate. Here, a new piecewise-linear form has been
implemented and proposed as a new base case as it seems generally satisfactory.
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Reference:
Robinson, W. & Butterworth, D.S. (2011). Penguin model update: an improved penguin mortality relationship with sardine biomass and results of sensitivities to the base case. FISHERIES/2011/SWG–PEL/58