2002 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.

  • Cover by Forsberg (pdf 538K)
  • Section 1 (pp. 1-40, pdf 587K)
    • Contents
    • IPHC research program: Review of 2001 projects and proposals for 2002 
  • Section 2 - The Fishery
    • Removals (pp. 41-78, pdf 692K)
      • 2002 Commercial fishery and regulation changes
      • Progress report on the examination of alternate approaches to halibut management
      • 2002 Sport Fishery
      • Wastage in the 2002 Pacific halibut fishery
      • Estimates of personal use harvest for 2002
      • Retention of sublegal halibut in the Area 4E CDQ fishery: 2002 harvests
      • History of Area 2 fisheries, management and assessments
    • Sampling and Analysis (pp. 79-92, pdf 489K)
      • Commercial catch sampling
      • Age distribution of the commercial halibut catch for 2002
  • Section 3a - Population Assessment (pp. 93-172, pdf 3.3MB)
    • Assessment of the Pacific halibut stock at the end of 2002 
    • Issues and tradeoffs in the implementation of a conditional constant catch harvest policy
    • Where are our halibut?  Displaying spatial and temporal distributions of Pacific halibut using GIS technology
  • Section 3b - Bycatch (pp. 173-218, pdf 748K)
    • Incidental catch and mortality of Pacific halibut, 1962-2002
    • The 2002 groundfish fishery off Alaska:  Groundfish catches, halibut bycatches, and other information
    • The Bering Sea trawl fishery Prohibited Species Donation (PSD) program: Results from 1998-2002
    • Pacific halibut discard mortality rates in the 1990-2001 Alaskan groundfish fisheries, with recommendations for monitoring in 2003
  • Section 4 - Biological Research
    • General (pp. 219-258, pdf 2.9MB)
      • Using otolith microchemistry to determine nursery origin:  an initial test of concept
      • Planning for the future:  Otolith collections and archiving for an elemental world
      • Incidence of crystallized otoliths from the 2000 and 2001 setline surveys
      • Comparison of surface and break-and-burn ages for paired left and right otoliths
      • Spatial and ontogenetic variability in the trophic status of Pacific halibut:  Progress report (pp. 259-284, pdf 695K)
      • Feasibility of using electronic monitoring for assessing compliance and effectiveness of seabird avoidance devices and monitoring seabird mortality in halibut longline fisheries:  Progress report
      • Chalky studies in 2002:  Project to understand the physiological processes associated with chalky halibut
    • Tagging (pp 285-312, pdf 761K)
      • Aims of the proposed IPHC marking experiment
      • Technical review of the proposed IPHC PIT tag marking experiment
      • IPHC staff comments on the "Technical review of the proposed IPHC PIT tag marking experiment"
      • PIT tagging protocol for Pacific halibut: tag placement, shedding studies, and data capture during tagging
      • PIT tag scanning investigations (pp 313-344, pdf 1.4MB)
      • Dockside scanning studies of the use of passive integrated transponder (PIT) tags on Pacific halibut (Hippoglossus stenolepis):  Feasibility and comparisons of PIT tag readers
      • Tagging studies
    • Survey Results (pp. 345-382, pdf 1.2MB)
      • 2002 Standardized stock assessment survey
      • Cruise report for the 2002 NMFS Bering Sea trawl survey
      • Prior Hook Injuries (PHI):  Results from the 2002 IPHC SSA surveys and NMFS trawl surveys
    • Survey Analysis (pp. 383-420, pdf 6.2MB)
      • Estimates of juvenile halibut abundance and distribution in Area 3 from NMFS trawl surveys
      • Size and age composition of Pacific halibut in NMFS Bering Sea shelf trawl surveys
      • Pacific halibut morphometric comparisons

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