Spatial Models of Tuna Dynamics in the Western Pacific: Is International Management Necessary?
Two explicit spatial models are presented to analyze the interaction between tuna fisheries in adjacent jurisdictions. Given the movements of skipjack tuna, and the large EEZ size of Western Pacific countries, there would appear to be little effect of” skipjack fisheries outside of the EEZ on the catch inside the EEZ of most countries. This is less true for yellowfin tuna which live longer. The models presented, and the data and analysis required to estimate parameters necessary for these models, provides a quantitative framework for the analysis of interaction and the need for international catch regulation.
KeywordsMovement Rate Fishing Effort Catch Rate Yellowfin Tuna Harvest Rate
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