Dynamic Management of Pacific Salmon Fisheries

Dynamic management of Pacific salmon fisheries refers to an adaptive framework that integrates real-time information on stock abundance, habitat variability and spatial dynamics to optimise harvests while safeguarding population resilience. Central to this approach are in-season assessments that guide fishing effort, spatially and temporally explicit closures that respond to shifting run timing, and portfolio-based strategies that maintain a mosaic of independent subpopulations. By recognising heterogeneity in freshwater rearing habitats, ocean migration pathways and localised disturbances, dynamic management seeks to balance economic yield with conservation of genetic and demographic diversity. Practical applications range from river-specific escapement targets and mixed-stock harvest controls to mark-selective fisheries and time–area closures, often co-developed with Indigenous communities. This adaptive paradigm is critical in an era of accelerating climate change, altering hydrological regimes and evolving human uses of coastal and inland waters. The global significance of these methods is underscored by their deployment across British Columbia, Alaska, Kamchatka and other Pacific Rim regions, offering a template for sustainable stewardship of anadromous fish under uncertainty.

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Dynamic Management of Pacific Salmon Fisheries publication trend

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Technical terms

Portfolio effect: The stabilising impact of maintaining multiple, asynchronously varying subpopulations within a species stock.

Metapopulation: A network of local populations connected by dispersal, whose collective dynamics influence regional persistence.

Escapement: The number of adult salmon allowed to escape fishing and return to freshwater to spawn.

Catch-per-unit-effort (CPUE): A standardised measure of fish abundance based on the catch rate of a given fishing effort.

Mixed-stock fishery: A fishery that simultaneously harvests multiple salmon populations with differing conservation statuses.

In-season assessment: The process of updating stock abundance estimates and management advice during the fishing season using incoming data.

References

1. Habitat modulates population‐level responses of freshwater salmon growth to a century of change in climate and competition. Global Change Biology (2023).
2. The role of spatial structure in at‐risk metapopulation recoveries. Ecological Applications (2023).
3. In-season assessment and management of salmon stocks using a Bayesian time–density model. Canadian Journal of Fisheries and Aquatic Sciences (2018).