Optimal Control Strategies to Reduce Sea Lion Bycatch in Squid Fishing

D.I. Wilson and M. Soboil (New Zealand)


Natural resource management, squid, sea lion, bycatch, op timal control


Strategies to minimise sea lion bycatch in the squid fishing industries require a combination of exploiting the spatial and temporal characteristics of both squid and sea lions. Optimal control theory provides a useful starting point to develop feasible strategies to efficiently manage the resource. If these proposed strategies are successful, then the fishing industry will be self-governing meaning that there is less need for drastic external legislative action such as prematurely closing the fishing season. This paper develops a dynamic bio-economics model and compares various management strategies including op timal control to ensure that both the squid fishingindustry and the sea lion population are sustainable.

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