2006 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.

  • Contents (pp. 1-8, pdf 233KB)
  • Section 1 (pp. 9-32, pdf 278KB)
    • IPHC research program: Review of 2006 projects and proposals for 2007 
  • Section 2 - The Fishery (pp. 33-80, pdf 387KB)
    • Removals 
      • 2006 Commercial fishery and regulation changes
      • 2006 Sport Fishery
      • Wastage in the 2006 Pacific halibut fishery
      • The personal use harvest of Pacific halibut in 2005
      • Retention of sublegal halibut in the Areas 4D/4E CDQ fishery: 2006 harvests
    • Sampling and Analysis
      • Commercial catch sampling
      • Age distribution of the commercial halibut catch for 2006
  • Section 3a - Population Assessment (pp. 81-160, pdf 786KB)
    • Motivation and plan for a coastwide stock assessment
    • Assessment of the Pacific halibut stock at the end of 2006
    • Analysis of PIT tag recoveries through 2006
    • Further investigations of low PIT recovery rates 
    • 2006 harvest policy concerns
  • Section 3b - Incidental Catch of Halibut (pp. 161-198, pdf 346KB)
    • Incidental catch and mortality of Pacific halibut, 1962-2006
    • Pacific halibut discard mortality rates in the 2005 groundfish fisheries, and recommendations for 2007-2009
    • The Bering Sea trawl fishery Prohibited Species Donation Program: Results from 1998-2006
    • Discussion paper on "regularizing" of bycatch, sport, and subsistence catch
    • A pilot study to evaluate the use of electronic monitoring on a Bering Sea groundfish factory trawler
  • Section 4 - Biological Research
    • General I (pp. 199-238, pdf 2.1 MB)
      • Using otolith chemistry to determine halibut nursery origin
      • False annuli identification in juvenile halibut ages one to four using LA-ICP-MS
      • False annuli identification in juvenile halibut ages one to four using marginal increment analysis
      • False annuli identification in the early years (ages one to four) of adult Bering Sea halibut  using marginal increment analysis
      • Microsatellite variation in spawning adults of Pacific halibut in the Gulf of Alaska and Bering Sea
      • Deployment of the Seacat water column profiler in 2006
    • General II (pp. 239-270, pdf 1.4 MB)
      • Examining the behavior of rockfish and halibut around pots
      • Homogeneity test for the Pacific sleeper shark (Somniosus pacificus): Project update
      • Technique development for age determination of the Pacific sleeper shark (Somniosus pacificus)
      • A one-dimensional spatial analysis of Pacific halibut (Hippoglossus stenolepis) on longline gear: testing for aggregation based on sex and length
    • Tagging (pp 271-334, pdf 1.2 MB)
      • Tagging studies
      • Portside sampling for recovered PIT tags in Pacific halibut
      • Using Pop-up Archival Transmitting (PAT) tags to study seasonal migration timing and summer homing rates  in the Gulf of Alaska
      • Using Pop-up Archival Transmitting (PAT) tags to assess early-season dispersion of halibut in Areas 2A and 2B
      • Assessing seasonal migration and putative spawning location of adult Pacific halibut in the southeast Bering Sea using Pop-up Archival Transmitting (PAT) tags
      • Use of archival tags to study migration and behavior of male and pre-recruit Pacific halibut (Hippoglossus stenolepis): phase I, development of surgical techniques
    • Survey (pp. 335-398, pdf 1.4 MB)
      • 2006 Standardized stock assessment survey
      • Prior Hook Injuries:  Results from the 2006 IPHC SSA and NMFS surveys
      • Age distribution of Pacific halibut in the 2006 IPHC stock assessment setline surveys
      • Cruise report for the 2006 NMFS Bering Sea trawl survey
      • Size and age composition of Pacific halibut in NMFS Bering Sea shelf trawl surveys

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