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IPHC Setline Survey Data 2018 Shows Stock Assessment of Pacific Halibut Sizes of Halibut Are Shrinking!

5/2/2019

1 Comment

 
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Each year the International Pacific Halibut Commission conducts a setline survey. The above map shows a series of dots or “Stations” that the contracted long line vessels dropped long line skates with hooks spread 18 feet apart. Bait used was all the same throughout the survey, #2 semi-bright chum salmon. These surveys determine the health of the overall stock throughout the Pacific Halibut range.
All totaled, the setline survey caught and kept 819,975 pounds of halibut and sold it for $4,706,403.00 which pays for the survey effort.
The setline survey shows the catch rate via numbers of halibut caught for each area targeted with the long lines. As a sports angler this information is fascinating if you spend the time to investigate. The IPHC Set Line Survey Interactive Map https://iphc.int/data/fiss-data-query offers invaluable data. Once on the link watch the video on how to use the interactive map and then click on each dot where the survey was done. The catch data will show on the right side of the page. This data reveals some interesting data of halibut populations and which spots contain the highest numbers of halibut.
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In 2017 a massive hypoxia event occurred off the coast of Washington resulting in almost no halibut present in the purple area during the setline survey. In 2018 there was no hypoxia event and the halibut returned which bodes well for Washington halibut anglers.
Last year’s setline survey revealed the following
  • Fishery and modeled survey trends down coast wide
  • Biomass estimates are slightly larger than from last year’s assessment, and observations of incoming recruits further reduced estimated fishing intensity
  • Spawning biomass still estimated to be decreasing and projected to decrease
  • Overall halibut sizes are decreasing as shown in the graph below
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“We are now down to the lowest numbers of halibut in our set line survey since the 1990’s,” said Dr. Ian Stewart from IPHC
I’ll keep all of you updated as the IPHC meetings this week continue. These meetings should result in seasons and quotas.
1 Comment
Norfolk Sandblasting link
6/30/2022 12:42:11 pm

Great readiing your post

Reply



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