Download or read book The Commercial Size Limit for the Pacific Halibut Fishery Off Alaska and Its Relationship to Observer derived Estimates of At sea Discard written by Jennifer A. Cahalan and published by . This book was released on 2022 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Register written by and published by . This book was released on 1978 with total page 1590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pacific Halibut Fishery Regulations written by and published by . This book was released on 2004 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bering Sea Chinook Salmon Bycatch Management Regulatory Impact Review initial Regulatory Flexibility Analysis written by and published by . This book was released on 2009 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving Fish Stock Assessments written by National Research Council and published by National Academies Press. This book was released on 1998-02-27 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ocean harvests have plateaued worldwide and many important commercial stocks have been depleted. This has caused great concern among scientists, fishery managers, the fishing community, and the public. This book evaluates the major models used for estimating the size and structure of marine fish populations (stock assessments) and changes in populations over time. It demonstrates how problems that may occur in fisheries dataâ€"for example underreporting or changes in the likelihood that fish can be caught with a given type of gearâ€"can seriously degrade the quality of stock assessments. The volume makes recommendations for means to improve stock assessments and their use in fishery management.
Download or read book Annual Report International Pacific Halibut Commission written by International Pacific Halibut Commission and published by . This book was released on 2010 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discards in the World s Marine Fisheries written by Kieran Kelleher and published by Food & Agriculture Org.. This book was released on 2005 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication gives an updated review of the quantity of discards in the world's marine fisheries, using information from a broad range of fisheries in all continents. A number of policy issues are discussed including a 'no discards' approach to fisheries management, the need for balance between bycatch reduction and bycatch utilisation initiatives, and concerns arising from incidental catches of marine mammals, birds and reptiles. The report also highlights the need for more robust methods of estimating discards, and the development of bycatch management plans.
Download or read book Movements of Juvenile Halibut in IPHC Regulatory Areas 2 and 3 written by Ray Hilborn and published by . This book was released on 1995 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Scientific Report written by International Pacific Halibut Commission and published by . This book was released on 1971 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Re evaluation of the 32 inch Commercial Size Limit written by William G. Clark and published by . This book was released on 1995 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intrinsic growth parameters of female and male halibut, and the length-specific selectivity of the commercial setline fishery, were estimated by fitting a simple model to catch composition data collected in Areas 2B and 3A in 1990 and 1991. Area-specific schedules of female maturity as a function of length were estimated using data collected during the 1980s. Yield per recruit and spawning biomass per recruit of halibut in Area 2B and 3A were calculated using the new estimates of growth, selectivity, and maturity. The results showed the current 32-inch commercial size limit to be appropriate. (At time of publication in mid-1995, it is clear that halibut life history parameters have changed considerably since 1990. The size limit is therefore being reviewed again.).
Download or read book Technical Report written by and published by . This book was released on 1969 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report written by International Pacific Halibut Commission and published by . This book was released on 2009 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regulatory Amendment for a Pacific Halibut Catch Sharing Plan for the Charter Sector and Commercial Setline Sector in International Pacific Halibut Commission Regulatory Area 2C and Area 3A written by Jane DiCosimo and published by . This book was released on 2013 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This analysis examines proposed changes to the management of Pacific halibut in the charter fisheries and commercial setline fisheries in International Pacific Halibut Commission (IPHC) Regulatory Areas 2C and 3A in the Gulf of Alaska. The North Pacific Fishery Management Council (Council) identified a need to develop a catch sharing plan (CSP) for the charter and commercial sectors to address conservation and allocation concerns in both areas. These concerns resulted from: 1) increased harvests in the charter halibut fishery, and 2) decreased catch limits in the commercial setline fisheries. The Council considered five alternatives and adopted a Preferred Alternative from among proposed CSP elements. The Council adopted its Preferred Alternative using the proposed charter allocations under Alternative 3 for Area 2C and the proposed charter allocations under Alternative 4 for Area 3A. The Council also adopted revised elements for a Guided Angler Fish Program, in which Charter Halibut Permit holders would be allowed to lease commercial Individual Fishing Quota in order to provide charter anglers with harvesting opportunities, not to exceed limits in place for unguided anglers. Annual management measures would be implemented each year through a cooperative program among state and Federal agencies. The Council also would request that the IPHC: 1) annually set a combined charter and commercial setline catch limit, to which the allocation percentage for each area would be applied to establish the domestic harvest allowances for each sector and 2) implement separate accountability of halibut removals for each sector. Upon implementation, the Alaska Department of Fish and Game logbooks would be used as the primary data source for estimating charter halibut harvest. The Council intends that the CSP would be implemented by National Marine Fisheries Service for 2014, which is the earliest possible timeline.
Download or read book Incidental Catch and Mortality of Pacific Halibut 1962 1986 written by Gregg H. Williams and published by . This book was released on 1989 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Pacific Halibut Commission (IPHC) annually compiles estimates of the amount of Pacific halibut (Hippoglossus stenolepis) incidentally caught in fisheries directed at shellfish and other groundfish. Incidental catches in foreign and joint venture fisheries off Alaska are estimated by the U.S. National Marine Fisheries Service, whereas IPHC estimates incidental catches in all other fisheries. For fisheries which receive at-sea monitoring, halibut incidence data extrapolated to the fishery provide a reliable estimate of incidental catch. Estimates based on incidence data collected during infrequent observer programs or observed on research surveys are considered less reliable and, in some cases, only indicate the general magnitude of the incidental catch. The combined estimates for all fisheries show that incidental catch peaked at 26 million pounds (net weight) in 1962. Incidental catch has generally declined since the early 1960s when estimates were first available, although there have been periodic increases in the early 1970s and 1980s when effort expanded in specific areas. By 1986, incidental catch declined to 10 million pounds. Based on mortality rates of 100 percent in the foreign trawl, joint venture, U.S. crab pot and shrimp trawl fisheries, 50 percent in U.S. and Canadian trawl fisheries for groundfish, and 25 percent on foreign setline operations, the actual loss was estimated at 25 million pounds in 1962, but has since declined to 7 million pounds in 1986, the lowest since the early 1960s. By comparison, the directed commercial and sport fishery for halibut harvested 73.1 million pounds in 1986.
Download or read book Estimation of Bycatch in the Unobserved Pacific Halibut Fishery Off Alaska written by Cindy Ann Tribuzio and published by . This book was released on 2014 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was not to determine how these catch estimates should be incorporated into the assessment and no management advice is provided in this document. There are a number of caveats to be considered when using the catch estimates and assessment authors are recommended to be aware of those caveats prior to using the estimates.
Download or read book US Exclusive Economic Zone EEZ written by and published by . This book was released on 1983 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Halibut Body Size from Otolith Size written by William G. Clark and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
