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Characterizing And Accounting For Uncertainties In Pacific Salmon Fisheries
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Book Synopsis Characterizing and Accounting for Uncertainties in Pacific Salmon Fisheries by : Catherine Anne (Carrie) Holt
Download or read book Characterizing and Accounting for Uncertainties in Pacific Salmon Fisheries written by Catherine Anne (Carrie) Holt and published by . This book was released on 2007 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uncertainties are widespread in Pacific salmon fisheries, occurring in both biological and management components. Despite recent attempts by scientists to account for uncertainties in stock assessments and incorporate them into advice to managers, some sources of uncertainties are often still ignored. My dissertation addressed four of these sources for Pacific salmon fisheries related to: forecasts of adult abundances, effectiveness of fishing regulations when implemented, the ability of management to achieve stated objectives, and international management institutions. First, despite evidence for long-term increases in age-at-maturity of sockeye salmon (Oncorhynchus nerka), these increases have not been accounted for when forecasting age-specific abundances of adult returns. To account for these trends, I developed a new forecasting model that used a Kalman Filter to track long-term changes in its parameters. Second, stock assessors and managers often assume that management targets are achieved exactly, but outcomes from fishing regulations rarely match targets. I quantified bias and imprecision in this "outcome uncertainty" for sockeye salmon fisheries on the Fraser River, British Columbia, and developed a method to adjust current harvest rules for that source of uncertainty. Third, although my research suggests that these two modifications to forecasting models and harvest rules are feasible, the magnitude of improved performance of management that includes these modifications is not certain. I evaluated the performance of these two modifications in a computer model for sockeye salmon fisheries in British Columbia and Alaska. I found that, compared to the status quo, performance increased when outcome uncertainties were accounted for, but in contrast to initial expectations, this was not the case when accounting for forecasting uncertainty. Fourth, salmon body sizes at a given age have declined across the North Pacific over the last fifty years, in part due to increased competition among salmon populations from different countries for a common pool of prey resources. However, the incentives for collective action to reverse this trend are not clear, creating uncertainties in resolving this common-pool resource problem. I investigated the potential for international cooperation on this problem by identifying the incentives and disincentives for altering behaviour of individual nation states to encourage collective action.
Book Synopsis The Pacific Fishery Management Council's Role in Salmon Fisheries by : United States. General Accounting Office
Download or read book The Pacific Fishery Management Council's Role in Salmon Fisheries written by United States. General Accounting Office and published by . This book was released on 1978 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of concerns about overfishing, the Fishery Conservation and Management Act extended U.S. jurisdiction to 200 miles off its coasts and imposed on fishermen responsibilities for conserving and using fishery resources within the 200-mile zone. The act established eight regional fishery management councils to perform certain duties, including preparing management plans. The 1977 and 1978 plans developed by the Pacific Fishery Management Council have objectives of maintaining optimum spawning stock escapements, helping fulfill Indian treaty obligations, and providing all ocean and inland water fisheries the continuing opportunity to harvest salmon. The act requires an increase in the use of economic, social, and ecological factors in the plans in addition to traditional biological considerations. Concerns have been expressed over data used to support Council decisions. Some fisheries officials stated that the Council failed to obtain sufficient social and economic data for the 1977 and 1978 ocean salmon plans. Estimates based on a computer model were that Washington fishermen's net annual salmon catches would increase by 800,000 pounds but that the catch of commercial troll salmon fisheries off the coast of Washington would decrease by up to 1,700,000 pounds. Because of the lack of reliable economic data, the monetary impact of regulatory controls on commercial troll fishermen could not be determined. Concern was also expressed over the adequacy of fishing industry representation on the Council and the Council's consideration of Indian treaty fishing rights. Council officials recognized deficiencies in the database, and several research studies are underway to provide additional information for developing a comprehensive salmon plan for the 1980 fishing season.
Book Synopsis The Pacific Salmon Fisheries by : James A. Crutchfield
Download or read book The Pacific Salmon Fisheries written by James A. Crutchfield and published by Routledge. This book was released on 2013-10-18 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study attributes the chronic economic distress of the valuable Pacific salmon industry not only to decline in catch but also to the economic problems of open access ocean fisheries. It analyzes salmon public management programs and proposes alternatives. Originally published in 1969
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Pacific Fishery Management Council's Role in Salmon Fisheries by : United States Accounting Office (GAO)
Download or read book The Pacific Fishery Management Council's Role in Salmon Fisheries written by United States Accounting Office (GAO) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pacific Fishery Management Council's Role in Salmon Fisheries
Book Synopsis Ecosystem-Based Fisheries Management by : Jason Link
Download or read book Ecosystem-Based Fisheries Management written by Jason Link and published by Cambridge University Press. This book was released on 2010-10-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Responsible fisheries management is of increasing interest to the scientific community, resource managers, policy makers, stakeholders and the general public. Focusing solely on managing one species of fish stock at a time has become less of a viable option in addressing the problem. Incorporating more holistic considerations into fisheries management by addressing the trade-offs among the range of issues involved, such as ecological principles, legal mandates and the interests of stakeholders, will hopefully challenge and shift the perception that doing ecosystem-based fisheries management is unfeasible. Demonstrating that EBFM is in fact feasible will have widespread impact, both in US and international waters. Using case studies, underlying philosophies and analytical approaches, this book brings together a range of interdisciplinary topics surrounding EBFM and considers these simultaneously, with an aim to provide tools for successful implementation and to further the debate on EBFM, ultimately hoping to foster enhanced living marine resource management.
Book Synopsis International Pacific Salmon Fisheries Commission Bulletin VI by : International Pacific salmon fisheries commission
Download or read book International Pacific Salmon Fisheries Commission Bulletin VI written by International Pacific salmon fisheries commission and published by . This book was released on 1954 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Framework for Characterizing Conservation Units of Pacific Salmon (Oncorhynchus Spp.) for Implementing the Wild Salmon Policy by : Leslie Blair Holtby
Download or read book Framework for Characterizing Conservation Units of Pacific Salmon (Oncorhynchus Spp.) for Implementing the Wild Salmon Policy written by Leslie Blair Holtby and published by . This book was released on 2009 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251306079 Total Pages :654 pages Book Rating :4.2/5 (513 download)
Book Synopsis Impacts of climate change on fisheries and aquaculture by : Food and Agriculture Organization of the United Nations
Download or read book Impacts of climate change on fisheries and aquaculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-01-06 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.
Book Synopsis Risk Evaluation and Biological Reference Points for Fisheries Management by : National Research Council Canada
Download or read book Risk Evaluation and Biological Reference Points for Fisheries Management written by National Research Council Canada and published by NRC Research Press. This book was released on 1993 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented: 1) Reference points for fisheries management: the western Canadian experience; 2) Reference points for fisheries management: the eastern Canadian experience; 3) Reference points for fisheries management: the ICES experience; 4) Spawning stock biomass per recruit in fisheries management: foundation and current use; 5) The development of a management procedure for the South African anchovy resource; 6) How much spawning per recruit is enough?; 7) The behaviour of Flow, Fmed and Fhigh in response to variation in parameters used for their estimation; 8) The Barents Sea capelin stock collapse: a lesson to learn; 9) Variance estimates for fisheries assessment: their importance and how best to evaluate them; 10) Evaluating the accuracy of projected catch estimates from sequential population analysis and trawl survey abundance estimates; 11) Bootstrap estimates of ADAPT parameters, their projection in risk analysis and their retrospective patterns; 12) Analytical estimates of reliability for the projected yield from commercial fisheries; 13) Risk evaluation of the 10% harvest rate procedure for capelin in NAFO Division 3L; 14) Using jackknife and Monte Carlo simulation techniques to evaluate forecast models for Atlantic salmon; 15) Monte Carlo evaluation of risks for biological reference points used in New Zealand fishery assessments; 16) A comparison of event free risk analysis to Ricker spawner-recruit simulation: an example with Atlantic menhaden; 17) Choosing a management strategy for stock rebuilding when control is uncertain; 18) Risks and uncertainties in the management of a single-cohort squid fishery: the Falkland Islands Illex fishery as an example; 19) Risks of over- and under-fishing new resources; 20) Estimation of density-dependent natural mortality in British Columbia herring stocks through SSPA and its impact on sustainable harvesting strategies; 21) The comparative performance of production-model and ad hoc tuned VPA based feedback-control management procedures for the stock of Cape hake off the west coast of Africa; 22) A proposal for a threshold stock size and maximum fishing mortality rate; 23) Biological reference points for Canadian Atlantic gadoid stocks; 24) Stochastic locally-optimal harvesting; 25) ITQ based fisheries management; 26) Bioeconomic methods for determining TACs; 27) Management strategies: fixed or variable catch quotas; 28) Bioeconomic impacts of TAC adjustment strategies: a model applied to northern cod; 29) Experimental management programs for two rockfish stocks off British Columbia; 30)A brief overview of the experimental approach to reducing uncertainty in fisheries management; 31) Fisheries management organizations: a study of uncertainty.
Book Synopsis Adaptive Management of Renewable Resources by : Carl J. Walters
Download or read book Adaptive Management of Renewable Resources written by Carl J. Walters and published by . This book was released on 1986 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this classic text first published in 1986, Walters challenges the traditional approach to dealing with the management of such renewable resources as fish and wildlife. He argues that scientific understanding will come from the experience of management as an ongoing, adaptive, and experimental process.
Book Synopsis Bering Sea Chinook Salmon Bycatch Management, Regulatory Impact Review/initial Regulatory Flexibility Analysis by :
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 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological & Agricultural Index by :
Download or read book Biological & Agricultural Index written by and published by . This book was released on 1989 with total page 2344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improving Fish Stock Assessments by : National Research Council
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.
Book Synopsis Inland Fisheries Management in North America by : Christopher C. Kohler
Download or read book Inland Fisheries Management in North America written by Christopher C. Kohler and published by . This book was released on 1999 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The book covers fishery assessments, habitat and community manipulations, and common practices for managing stream, river, lake, and anadromous fisheries. Chapters on history; ecosystem management; management processes; communications with the public; introduced, undesirable, and endangered species; and the legal and regulatory frameworks provide the context for modern fisheries management." From fisheries.org.
Book Synopsis Ecological and Genetic Implications of Aquaculture Activities by : Theresa M. Bert
Download or read book Ecological and Genetic Implications of Aquaculture Activities written by Theresa M. Bert and published by Springer Science & Business Media. This book was released on 2007-08-30 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, numerous prominent aquaculture researchers contribute 27 chapters that provide overviews of aquaculture effects on the environment. They comprise a comprehensive synthesis of many ecological and genetic problems implicated in the practice of aquaculture and of many proven, attempted, or postulated solutions to those problems. This is an outstanding source of reference for all types of aquaculture activities.
Download or read book Pacific Fisherman written by and published by . This book was released on 1929 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
