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Range-wide contrast in management outcomes for transboundary Northeast Pacific sablefish
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2024
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Source: Canadian Journal of Fisheries and Aquatic Sciences, 81(7), 810-827
[PDF-1.69 MB]
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Alternative Title:Simple, spatial estimation approaches avoid poor management outcomes for transboundary northeast Pacific sablefish
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Journal Title:Canadian Journal of Fisheries and Aquatic Sciences
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Description:Sablefish (Anoplopoma fimbria) of the Northeast Pacific support a highly mobile, valuable fishery resource currently managed as three separate populations. Recent work has shown sablefish to be genetically mixed; have high movement rates; and have synchronous biomass trends, including recent declines. A management strategy evaluation was developed with stakeholders and scientists from three regions to investigate whether spatially structured management paradigms might result in better conservation and economic outcomes. The management strategy evaluation includes a transboundary operating model to represent spatial population dynamics including movement and a delay–difference estimation method with varying spatial complexities and potential stratifications, and harvest control rules. Mismatches in the spatial scale of management and the underlying biological units pose a crucial risk of localized depletion in the southern U.S. West Coast. This study presents one of the first transboundary, spatially-explicit management strategy evaluations conditioned to actual data. These results underscore the importance of spatial management strategy evaluation tools and implications when regional management is conducted in isolation. Future work should incorporate additional spatial hypotheses and investigate the drivers of recruitment patterns range-wide.
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Source:Canadian Journal of Fisheries and Aquatic Sciences, 81(7), 810-827
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ISSN:0706-652X;1205-7533;
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