Author: Ray Hilborn
Publisher:
ISBN:
Category : Pacific halibut
Languages : en
Pages : 48
Book Description
In 1980 and 1981, more than 68,000 juvenile halibut were tagged in the Gulf of Alaska and Southeast Alaska in an effort to obtain estimates of movements of juvenile halibut. In this paper we develop a maximum likelihood method for estimating the movement between International Pacific Halibut Commission (IPHC) regulatory Areas 3B, 3A, 2C, 2B and 2A. In addition to the movement rates, we also estimate the sizespecific natural mortality, tagging mortality and size selectivity for commercial gear in Areas 3B and 3A. We found that all of these parameters could be estimated with low confounding, and that the predicted recovery pattern of tags conforms closely to the observed recoveries. The best fitting model estimates that there are substantial southerly movements of juvenile halibut; for example, we estimate that 17% of fish tagged in 3B would recruit as adults to 2B, and that 25% of fish tagged in 3A would recruit as adults to 2B. Further improvements in the analysis could include smaller spatial scale of analysis, and combining tagging analysis with catch-at-age data.
Movements of Juvenile Halibut in IPHC Regulatory Areas 2 and 3
Author: Ray Hilborn
Publisher:
ISBN:
Category : Pacific halibut
Languages : en
Pages : 48
Book Description
In 1980 and 1981, more than 68,000 juvenile halibut were tagged in the Gulf of Alaska and Southeast Alaska in an effort to obtain estimates of movements of juvenile halibut. In this paper we develop a maximum likelihood method for estimating the movement between International Pacific Halibut Commission (IPHC) regulatory Areas 3B, 3A, 2C, 2B and 2A. In addition to the movement rates, we also estimate the sizespecific natural mortality, tagging mortality and size selectivity for commercial gear in Areas 3B and 3A. We found that all of these parameters could be estimated with low confounding, and that the predicted recovery pattern of tags conforms closely to the observed recoveries. The best fitting model estimates that there are substantial southerly movements of juvenile halibut; for example, we estimate that 17% of fish tagged in 3B would recruit as adults to 2B, and that 25% of fish tagged in 3A would recruit as adults to 2B. Further improvements in the analysis could include smaller spatial scale of analysis, and combining tagging analysis with catch-at-age data.
Publisher:
ISBN:
Category : Pacific halibut
Languages : en
Pages : 48
Book Description
In 1980 and 1981, more than 68,000 juvenile halibut were tagged in the Gulf of Alaska and Southeast Alaska in an effort to obtain estimates of movements of juvenile halibut. In this paper we develop a maximum likelihood method for estimating the movement between International Pacific Halibut Commission (IPHC) regulatory Areas 3B, 3A, 2C, 2B and 2A. In addition to the movement rates, we also estimate the sizespecific natural mortality, tagging mortality and size selectivity for commercial gear in Areas 3B and 3A. We found that all of these parameters could be estimated with low confounding, and that the predicted recovery pattern of tags conforms closely to the observed recoveries. The best fitting model estimates that there are substantial southerly movements of juvenile halibut; for example, we estimate that 17% of fish tagged in 3B would recruit as adults to 2B, and that 25% of fish tagged in 3A would recruit as adults to 2B. Further improvements in the analysis could include smaller spatial scale of analysis, and combining tagging analysis with catch-at-age data.
Fisheries Review
Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 568
Book Description
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 568
Book Description
Pacific Coast Groundfish Fishery Management Plan, Bycatch Mitigation Program
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 506
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 506
Book Description
Technical Report
Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 276
Book Description
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 276
Book Description
Pacific Halibut Bycatch in the Groundfish Fisheries
Author: Patrick J. Sullivan
Publisher: Seattle, Wash. : International Pacific Halibut Commission
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 200
Book Description
Publisher: Seattle, Wash. : International Pacific Halibut Commission
ISBN:
Category : Bycatches (Fisheries)
Languages : en
Pages : 200
Book Description
Scientific Report - International Pacific Halibut Commission
Author: International Pacific Halibut Commission
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 450
Book Description
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 450
Book Description
The Pacific Halibut Resource and Fishery in Regulatory Area 2
Author: International Pacific Halibut Commission
Publisher: Seattle : International Pacific Halibut Commission
ISBN:
Category : Fishery resources
Languages : en
Pages : 314
Book Description
Publisher: Seattle : International Pacific Halibut Commission
ISBN:
Category : Fishery resources
Languages : en
Pages : 314
Book Description
Technical Report - International Pacific Halibut Commission
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 514
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 514
Book Description
Scientific Report - International Pacific Halibut Commission
Author: International Pacific Halibut Commission (United States and Canada).
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 616
Book Description
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 616
Book Description
Seasonal Movements and Environmental Conditions Experienced by Pacific Halibut Along the Aleutian Islands, Examined by Pop-up Satellite Tags
Author: Andrew C. Seitz
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 28
Book Description
This study examines the seasonal migration and depth-specific behavior of Pacific halibut along the Aleutian Islands, which serve as indicators of population structure.
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 28
Book Description
This study examines the seasonal migration and depth-specific behavior of Pacific halibut along the Aleutian Islands, which serve as indicators of population structure.