“Stockfish”, a Multispecies Model for Stochastic Analysis

Abstract

We explore the possibilities for constructing an aggregate model of the multispecies fish resources of the Barents Sea, useful for the purpose of policy analysis under uncertainty. A wish to make the model compatible with existing Norwegian models of the Barents Sea, notably the Aggmult and the Econmult models, works to complicate the model. A wish to use the model to search for policies under uncertainty, using computer intensive search procedures, calls for a limited number of calculations per simulation. Focus here is on the biological part of the model. The economic part of the model and the stochastics are presented in Moxnes (1994).

Thanks to Sigurd Tjelmeland and his colleges at the Institute of Marine Research in Bergen for much useful information and helpful comments, thanks to numerous other informants mentioned in footnotes here and in the original report.