1992 Report of Assessment and Research Activities

The IPHC Report of Assessment and Research Activities is a compilation of progress reports relating to staff activities. Some of the information contained here has changed since printing as new data is gathered and analyzed. For the most up-to-date information, please contact the author by visiting the staff directory or by phoning the Seattle office at (206) 634-1838.

  • The Fishery (pp. 1-30, pdf 1.1 MB)
    • 1992 Commercial fishery
    • Sport fishery
    • Wastage in the Pacific halibut commercial fishery
    • Commercial catch sampling
    • 1992 Estimates of personal use halibut
  • Stock Assessment (pp. 31-78, pdf 1.4 MB)
    • Population assessment
      • Population assessment, 1992
      • Population assessment, 1992 Technical supplement
      • Age composition and size at age of the commercial fishery for 1992
      • Mapping the spatial distribution of halibut in the Gulf of Alaska
    • Exploitation strategy (pp. 79-140, pdf 1.9 MB)
      • CPUE and the IVQ program
      • Estimation of halibut growth and selectivity parameters
      • Estimation of halibut maturity as a function of length
      • Evaluation of alternative harvest rates for Pacific halibut
      • Re-evaluation of the minimum size limit
  • Bycatch (pp. 141-226, pdf 3.1 MB)
    • Byatch and Mortality 
      • The 1992 Alaska groundfish fishery: Groundfish catches, halibut bycatches, and bycatch rates
      • Incidental catch and mortality of Pacific halibut: through 1992
    • Bycatch management
      • Status of bycatch management planning
      • Bycatch of halibut in the trawl fishery in Hecate Strait (Area 2B)
    • Research and Analysis
      • Pacific halibut discard mortality rates in the 1991 groundfish fishery off Alaska
      • Re-estimation of survival for trawl caught halibut released in different condition factors 
      • 1992 Bycatch scoping: Results from staff trips on a freezer longliner and a factory trawler
      • Comparison of Pacific halibut yield loss produced by bycatch in the trawl, longline, and pot Pacific cod fisheries in the Bering Sea
  • Section 4 - Biological Research (pp. 227-283, pdf 1.8 MB)
    • General
      • DNA analysis update
      • Pacific halibut parasite study
      • Underwater observations of interactions between Pacific halibut and bottom trawls
    • Surveys 
      • Bering Sea and Gulf of Alaska longline survey
      • 1992 West coast trawl survey
      • Results of the NMFS Bering Sea trawl survey
    • Tagging studies
      • Tagging studies
      • A depletion and tagging study in British Columbia

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