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All commercially valuable fish stocks fluctuate annually and this leads to challenges for fishery management. The biomass of Pacific whiting (Meluccius productus) is subject to large fluctuations owing to the highly variable nature of recruitment. A stochastic population dynamics model which includes multiple fishery sectors and a hockey stick stock–recruitment relationship tailored to generate occasional...
Swordfish are known to be sexually dimorphic. However, previous assessments of the status of swordfish in the North Pacific Ocean have not been based on population models that distinguish the sexes. A sex-specific age-structured assessment model was therefore constructed for the stock of swordfish in the North Pacific Ocean. However, prior to the application of this method to the data for the stock...
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