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Marine protected areas (MPAs) may create challenges for stock assessments because most models are based on the assumption that fishing mortality is uniform in space. Using both actual data and simulations, we explored two approaches to the stock assessment of Georges Bank Atlantic sea scallops (Placopecten magellanicus), where fishery closures were implemented in December 1994. One approach modeled...
Semelparity is a common life history characteristic of squids and other cephalopod species, yet most cephalopod stock assessment models assume a constant natural mortality rate that does not account for post-spawning mortality. Since older individuals are more likely to spawn, natural mortality is likely to increase with age. We provide a method of estimating the spawning mortality rate of adult semelparous...
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