1996 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.

  • Section 1 - Contents (pp. 1-78, pdf 3.1 MB)
    • Staff Recommendations for Research and Assessment: 1996/1997 and 1997/1998
    • Proposed research on climate change and halibut biology
  • Section 2 - The Fishery
    • Removals
      • 1996 Commercial fishery and regulation changes
      • Sport fishery
      • Wastage in the Pacific halibut commercial fishery
      • 1996 Estimates of personal use halibut
    • Sampling and Analysis
      • Commercial catch sampling
      • Age composition and size at age of the commercial fishery for 1996
  • Section 3 - Population Assessment (pp. 79-166, pdf 3.7 MB)
    • Population assessment, 1996
    • Population assessment, 1996 Technical Supplement
    • Changes to stock assessment methodology: Model documentation
    • Accounting for pre-recruit halibut bycatch mortality through harvest rate adjustment
    • Halibut CPUE as characterized by targeting practices
    • Evaluation of alternative harvest rates for Pacific halibut
  • Section 4 - Bycatch (pp. 167-260, pdf 3.8 MB)
    • Catch and Mortality 
      • The 1996 groundfish fishery off Alaska: Groundfish catches, halibut bycatches, and bycatch rates
      • Incidental catch and mortality of Pacific halibut: 1962-1996
    • Bycatch management
      • Status of 1996 bycatch management planning
    • Research and Analysis
      • Pacific halibut discard mortality rates in the 1990-1996 Alaskan groundfish fisheries, with recommendations for monitoring in 1997
      • Compilation of halibut bycatch and mortalities, 1974-1995, for input to the population assessment
      • Results from the 1996 NMFS Observer Questionnaires
      • A pilot program to retain halibut bycatch for food banks
      • Components of variation in halibut bycatch by vessels in the BSAI Pacific cod bottom-trawl fleet
  • Section 4 - Biological Research
    • Surveys (pp. 261-323, pdf 2.1 MB)
      • 1996 Setline grid survey
      • Distribution of halibut biomass in Areas 2A and 2B and indicated by setline surveys conducted in 1995
      • Preliminary report of the 1996 NMFS Gulf of Alaska triennial trawl survey
      • Results of the 1996 NMFS Bering Sea trawl survey
      • Survey information on distribution and trends in abundance
    • Tagging studies
      • Tagging studies
      • Sport tagging program

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