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1998 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
for e-mail addresses or by phoning the Seattle office at (206) 634-1838.
 | Section 1 - Contents (pp. 1-6, pdf
119 KB)
|
| Section 2 - The Fishery
 | Removals
 | 1998 Commercial fishery and regulation changes |
| Sport fishery |
| Wastage in the Pacific halibut commercial fishery |
| 1998 Estimates of personal use halibut |
|
| Sampling and Analysis (pp.
65-120, pdf 2.0 MB)
| Commercial catch sampling |
| Age composition and size at age of the commercial
fishery for 1998 |
| Preliminary results of seabird observations and
bycatch reported by fishermen to IPHC samplers in Alaskan and
Canadian Ports in 1998 |
|
| Population Assessment
| Assessment of the Pacific halibut stock in 1998 |
| The effects of an erroneous natural mortality
rate on a simple age-structured stock assessment (ABSTRACT) |
| Area 3B and Area 4 Pacific halibut catch
limits, 1999 |
|
|
| Section 3 - Bycatch
| Catch and Mortality (pp.
121-156, pdf 1.4 MB)
| Incidental catch and mortality of Pacific
halibut: 1962-1998 |
| Progress report on the halibut donation program
for the Bering Sea trawl fishery |
| The 1998 groundfish fishery off Alaska:
Groundfish catches, halibut bycatches, and bycatch rates |
| Changes to halibut bycatch management in 1998 |
|
| Research and Analysis (pp.
157-206, pdf 1.7 MB)
| Pacific halibut discard mortality rates (DMRs)
in the 1990-1997 Alaskan groundfish fisheries, with recommendations
for monitoring in 1999 |
| Halibut discard mortality rates (DMRs) in the
1997 BSAI hook & line Pacific cod fishery, with recommendations
for 1998 management |
| Result from the 1995 trawl tagging charter
investigating mortality of discarded Pacific halibut |
|
|
| Section 4 - Biological Research
| General (pp. 207-248,
pdf 1.4 MB)
| Climate change and halibut biology - Year Two progress report |
| Completion of halibut early life history project |
| Continuing the investigation into the occurrence and causes
of the chalky condition in Pacific halibut |
| Genetic variation in Pacific halibut (Hippoglossus
stenolepis) detected with novel microsatellite markers |
| Evaluation of maintaining the IPHC Closed Area
in the Bering Sea |
|
| Survey Results (pp. 249-318, pdf
3.4 MB)
| 1998 Setline grid survey |
| IPHC setline survey grid design changes
1960-1998 |
| Cruise report for the 1998 NMFS Bering Sea trawl
survey |
| Cruise report for the 1998 NMFS west coast trawl
survey |
| Prior hooking injuries found on halibut in the
1998 surveys |
|
| Experimental Fishing Projects (pp.
319-348, pdf 1.1 MB)
| Experiments with a bird avoidance device during
International Pacific Halibut Commission longline surveys |
| 1998 Experimental fishing |
|
| Tagging studies
| Tagging studies |
| Sport tagging program |
|
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