Fish Stock Assessments
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Improving Fish Stock Assessments
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1998-02-27
Improving Fish Stock Assessments written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-02-27 with Technology & Engineering categories.
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.
Fish Stock Assessments
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Author : Anne-Marie Fennell
language : en
Publisher:
Release Date : 2014-10-22
Fish Stock Assessments written by Anne-Marie Fennell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-22 with categories.
U.S. marine fisheries contribute over $100 billion annually to the American economy and provide recreational fishing opportunities to millions of Americans. To continue enjoying these benefits, the Nat. Oceanic and Atmospheric Admin. (NOAA) manages marine fish stocks to ensure their sustainable use. NOAA's National Marine Fisheries Service (NMFS) is responsible for fishery conservation and management, including fish stock assessments to estimate the size of the population of a fish stock and to examine whether a stock is overfished and provide support for management measures. This report (1) identifies differences in the number and frequency of fish stock assessments conducted by NMFS' regional fisheries science centers and the causes of those differences; (2) identifies how NMFS sets priorities for conducting fish stock assessments; (3) determines the funding NMFS receives annually for conducting fish stock assessments; and (4) determines how NMFS makes funding decisions to support fish stock assessments. Tables and figures. This is a print on demand report.
Stock Assessment For Fishery Management
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Author : Daniel D. Hoggarth
language : en
Publisher: Food & Agriculture Org.
Release Date : 2006
Stock Assessment For Fishery Management written by Daniel D. Hoggarth and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Business & Economics categories.
This publication contains guidelines for fish stock assessment and fishery management using the software tools and other outputs developed by the UK Department for International Development's Fisheries Management Science Programme (FMSP) from 1992 to 2004. It includes a CD-ROM with the installation files for each of the four FMSP software tools: LFDA (Length Frequency Data Analysis), CEDA (Catch Effort Data Analysis), YIELD and ParFish (Participatory Fisheries Stock Assessment).
Fish Stock Assessment
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Author : J. A. Gulland
language : en
Publisher:
Release Date : 1983-07-12
Fish Stock Assessment written by J. A. Gulland and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983-07-12 with Nature categories.
Describes the scientific techniques used in assessing fish stocks, evaluating the effect of fishing on these stocks, and the probable impact of different policies for developing and managing fisheries. Covers the techniques developed starting with simple models and continuing to more complex methods.
Review Of Northeast Fishery Stock Assessments
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Author : Committee to Review Northeast Fishery Stock Assessments
language : en
Publisher: National Academies Press
Release Date : 1998-05-01
Review Of Northeast Fishery Stock Assessments written by Committee to Review Northeast Fishery Stock Assessments and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-05-01 with Technology & Engineering categories.
The collapse of cod, flounder, and haddock fish stocks in the Northeast United States has caused widespread concern among managers and fishers in the United States and Canada. The diminishing stocks have forced managers to take strict regulatory measures. Numerous questions have been raised about the adequacy of stock assessment science used to evaluate the status of these stocks and the appropriateness of the management measures taken. Based on these concerns, Congress mandated that a scientific review of the methodology and data used to evaluate these stocks be conducted. In this volume, the committee concludes that although there are improvements to be made in data collection, modeling uncertainty, and communicating between fishers, managers, and scientists, the scientific methods used in the Northeast stock assessments are sound. Recommendations are made on how the stock assessment process can be improved.
Fish Stock Assessment Manual
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Author : Emygdio L. Cadima
language : en
Publisher: Food & Agriculture Org.
Release Date : 2003
Fish Stock Assessment Manual written by Emygdio L. Cadima and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Business & Economics categories.
This manual examines mathematical models applied in fish stock assessment, including models and variation rates; cohort models and analyses; stock fishing patterns, components, stock-recruitment relations, short- and long-term stock projections; fisheries resources management with regards to biological reference points and regulation measures; production models; estimation of parameters; and exercises.
Quantitative Fisheries Stock Assessment
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Author : R. Hilborn
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-12-01
Quantitative Fisheries Stock Assessment written by R. Hilborn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-01 with Science categories.
This book really began in 1980 with our first microcomputer, an Apple II +. The great value of the Apple II + was that we could take the computer programs we had been building on mainframe and mini-computers, and make them available to the many fisheries biologists who also had Apple II + 's. About 6 months after we got our first Apple, John Glaister came through Vancouver and saw what we were doing and realized that his agency (New South Wales State Fisheries) had the same equipment and could run the same programs. John organized a training course in Australia where we showed about 25 Australian fisheries biologists how to use microcomputers to do many standard fisheries analyses. In the process of organizing this and sub sequent courses we developed a series of lecture notes. Over the last 10 years these notes have evolved into the chapters of this book.
Computer Programs For Fish Stock Assessment
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Author : Per Sparre
language : en
Publisher: Food & Agriculture Org.
Release Date : 1987
Computer Programs For Fish Stock Assessment written by Per Sparre and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Nature categories.
Marine Fisheries Stock Assessment Improvement Plan
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Author :
language : en
Publisher:
Release Date : 2001
Marine Fisheries Stock Assessment Improvement Plan written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Fish stock assessment categories.
Introduction To Tropical Fish Stock Assessment
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Author : Per Sparre
language : en
Publisher:
Release Date : 1998
Introduction To Tropical Fish Stock Assessment written by Per Sparre and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Fish populations categories.
In Part 1, Manual, a selection of methods on fish stock assessment is described in detail, with examples of calculations. Special emphasis is placed on methods based on the analysis of length-frequencies. After a short introduction to statistics, it covers the estimation of growth parameters and mortality rates, virtual population methods, including age-based and length-based cohort analysis, gear selectivity, sampling, prediction models, including Beverton and Holt's yield per recruit model and Thompson and Bell's model, surplus production models, multispecies and multifleet problems, the assessment of migratory stocks, a discussion on stock/recruitment relationships and demersal trawl surveys, including the swept-area method. The manual is completed with a review of stock assessment, where an indication is given of methods to be applied at different levels of availability of input data, a review of relevant computer programs produced by or in cooperation with FAO, and a list of references, including material for further reading. In Part 2, Exercises, a number of exercises is given with solutions. The exercises are directly related to the various chapters and sections of the manual.