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- W2082049029 abstract "We briefly reviewed the decision rules currently used for managing two major high-latitude crab stocks, snow crab (Chionoecetes opilio) and Dungeness crab (Cancer magister), in the United States and Canada and compared them with model-based reference points, harvest rate, and biomass proportion relative to virgin biomass, developed using species- and area-specific parameters. The model followed a size-based approach, which incorporated BevertonHolt and Ricker stockrecruitment models and estimated mean and median reference points. The recruitment was also perturbed to generate distributions of reference points. The BevertonHolt stockrecruitment model provided a lower harvest rate than that of the Ricker model. Harvest rates were lower for combined sexes spawning biomass than for female-only spawning biomass. Increasing the minimum size at first capture and decreasing the handling mortality resulted in increased harvest rates. Changes in fishery duration and timing of fishery open date did not change the harvest rate appreciably. The harvest rates for the Canadian snow and Dungeness crabs were mostly higher than those estimated for the Bering Sea and Southeast Alaska stocks. Reliable estimates of a number of life history parameters are lacking for both species, and hence, the results of this exercise need to be treated in a precautionary manner." @default.
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- W2082049029 date "2004-08-01" @default.
- W2082049029 modified "2023-09-27" @default.
- W2082049029 title "Comparison of reference points estimated using a size-based method for two high-latitude crab species in the United States and Canada" @default.
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- W2082049029 doi "https://doi.org/10.1139/f04-137" @default.
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