Section 5 Draft 22 November 1999
etermine what catch levels likely will decrease abundance. The decision analysis indicates that a yield of about 17,000 mt most likely will keep spawning biomass the same and has only a 20% probability of reducing 2004 spawning biomass to less than 90% of 2000 spawning biomass. Based on this result,...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.13.166 http://www.afsc.noaa.gov/refm/docs/sable99.pdf |
| Summary: | etermine what catch levels likely will decrease abundance. The decision analysis indicates that a yield of about 17,000 mt most likely will keep spawning biomass the same and has only a 20% probability of reducing 2004 spawning biomass to less than 90% of 2000 spawning biomass. Based on this result, we recommend a 2000 ABC of 17,000 mt for the combined stock, a 7% increase from the 1999 ABC of 15,900 mt. The maximum permissible yield from an adjusted F 40% strategy is 17,200 mt. Regional ABC recommendation: A 5-year exponential weighting of the survey abundance index in weight (relative population weight or RPW) by region was used to apportion the combined ABC to regions, resulting in the following apportionments: Bering Sea 1,384 mt, Aleutian Islands 2,446 mt and Gulf of Alaska 13,170 mt, which is further apportioned Western 1,928 mt, Central 5,921 mt, West Yakutat 1,890 mt, and East Yakutat / Southeast 3,431 mt. Members of the fishing industry have asked us to show how fishery and |
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