Size-based assessment of data-limited inland fish stocks – Review and applications

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Publisher : Food & Agriculture Org.
ISBN 13 : 9251335028
Total Pages : 75 pages
Book Rating : 4.2/5 (513 download)

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Book Synopsis Size-based assessment of data-limited inland fish stocks – Review and applications by : Shephard, S., Valbo-Jorgensen, J., Abadía, J., Baigún, C., Doria, C.R.C., Fabré, N.N., Isaac, V.J., Ngor, P.B., Ruffino, M.L., Funge-Smith, S.J.

Download or read book Size-based assessment of data-limited inland fish stocks – Review and applications written by Shephard, S., Valbo-Jorgensen, J., Abadía, J., Baigún, C., Doria, C.R.C., Fabré, N.N., Isaac, V.J., Ngor, P.B., Ruffino, M.L., Funge-Smith, S.J. and published by Food & Agriculture Org.. This book was released on with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assessment of data-limited fish stocks is a rapidly evolving topic in marine fisheries, and is supported by an increasing focus on the socio-economic and ecological importance of small-scale fisheries. The challenges in such systems can be compounded in inland fisheries, which are often complex, spatially dispersed and difficult to monitor. This publication reviews the application of empirical indicators and simple size-based models usually used in marine fisheries, but also applicable in inland systems. It presents case study applications for important fisheries in the Amazon River (Brazil), Tonlé Sap River (Cambodia), Paraná River (Argentina) and Lago Bayano (Panama). These studies consider issues including spatial separation of life-history stages, strong modality in population size structure, and fishing gear selectivity. Local scientific experts interpreted trends in stock state. Empirical indicators showed strong decline in size structure and relative abundance for one of the four assessed Tonlé Sap stocks. The length-based spawning potential ratio model suggested that two of the three assessed Amazon Goliath catfish stocks, and the sábalo stock in the Paraná River, were below sustainable spawning potential ratio reference points. The Lago Bayano tilapia stock appeared healthy. The review concludes that data-limited assessment methods developed for marine stocks may provide guidance for the sustainable management of important target species in inland fisheries. The methods tested are probably less applicable in non-selective fisheries where small species are preferred, or in river fisheries with extreme dependence on flood pulses. Important considerations are species life history and spatial distribution, environmental variability, and fishery sampling strategy.

A Review of Length-based Approaches to Assessing Fish Stocks

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Publisher : Food & Agriculture Org.
ISBN 13 : 9789251031216
Total Pages : 112 pages
Book Rating : 4.0/5 (312 download)

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Book Synopsis A Review of Length-based Approaches to Assessing Fish Stocks by : J. A. Gulland

Download or read book A Review of Length-based Approaches to Assessing Fish Stocks written by J. A. Gulland and published by Food & Agriculture Org.. This book was released on 1992 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document reviews the several fish stock assessment methods based on length-frequency analysis. Emphasis is placed on sampling and collection of length-frequency data, to the estimation of population parameters such as growth, mortality and recruitment and the estimation of catch selectivity. Attention is given to the conversion of length to age using age-length keys, slicing length-frequency composition, and using modes. It reviews long-and short-term effects of changes in selection and fishing mortality, and discusses methods for long-term assessments and for short-term projections. The manual gives several examples of the most common methods used and stresses the advantages of using personal computers and the most recent software for data processing and analysis.

FAO publications catalogue 2021

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Publisher : Food & Agriculture Org.
ISBN 13 : 925134289X
Total Pages : 120 pages
Book Rating : 4.2/5 (513 download)

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Book Synopsis FAO publications catalogue 2021 by : Food and Agriculture Organization of the United Nations

Download or read book FAO publications catalogue 2021 written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2021-04-28 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This catalogue aims to improve the dissemination and outreach of FAO’s knowledge products and overall publishing programme. By providing information on its key publications in every area of FAO’s work, and catering to a range of audiences, it thereby contributes to all organizational outcomes. From statistical analysis to specialized manuals to children’s books, FAO publications cater to a diverse range of audiences. This catalogue presents a selection of FAO’s main publications, produced in 2020 or earlier, ranging from its global reports and general interest publications to numerous specialized titles. In addition to the major themes of agriculture, forestry and fisheries, it also includes thematic sections on climate change, economic and social development, and food safety and nutrition.

Stock Assessment

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Publisher : CRC Press
ISBN 13 : 1000940969
Total Pages : 538 pages
Book Rating : 4.0/5 (9 download)

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Book Synopsis Stock Assessment by : Vincent F. Gallucci

Download or read book Stock Assessment written by Vincent F. Gallucci and published by CRC Press. This book was released on 2023-05-31 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stock Assessment: Quantitative Methods and Applications for Small Scale Fisheries is a book about stock assessment as it is practiced. It focuses on applications for small scale or artisanal fisheries in developing countries, however it is not limited in applicability to tropical waters and should also be considered a resource for students of temperate fishery management problems. It incorporates a careful sample design, various mathematical models as a basis for predicting consequences for stock exploitation, and discusses the impact of exploitation on non-targeted species. This was a unique concept involving a collaborative effort between U.S. and host country scientists to address issues of regional and global concern through innovative research. Unlike other books on stock assessment that show mathematical models, this is the only book of its kind that discusses how an assessment is carried out. It looks at the field as a whole and includes sampling, age determination and acoustics. The book represents the culmination of a nine-year program financed by the United States Agency for International Development to provide new or improved methods of stock assessment for artisanal fisheries.

Stock Assessment in Inland Fisheries

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Publisher : Wiley-Blackwell
ISBN 13 : 9780852382240
Total Pages : 528 pages
Book Rating : 4.3/5 (822 download)

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Book Synopsis Stock Assessment in Inland Fisheries by : Ian G. Cowx

Download or read book Stock Assessment in Inland Fisheries written by Ian G. Cowx and published by Wiley-Blackwell. This book was released on 1996-04-11 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on an international symposium and workshop hosted by the University of Hull International Fisheries Institute, this new reference includes expert reviews of the advantages and shortcomings of all current techniques and management strategies used in assessment of freshwater fish stocks worldwide. In addition to the core reports, overview papers present a summary of the current status of our knowledge in each of the major subject areas, with a final chapter appraising present and future perspectives on the concept of stock assessment. All contributions are fully illustrated and referenced. Stock Assessment in Inland Fisheries is likely to become the international, standard reference for all fisheries departments--offering a single source of contemporary and definitive information. Moreover, it is also intended to serve as a course text for students learning about freshwater-fisheries management.

Stock Assessment

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Publisher : CRC Press
ISBN 13 : 9781566701518
Total Pages : 544 pages
Book Rating : 4.7/5 (15 download)

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Book Synopsis Stock Assessment by : Vincent F. Gallucci

Download or read book Stock Assessment written by Vincent F. Gallucci and published by CRC Press. This book was released on 1995-10-25 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stock Assessment: Quantitative Methods and Applications for Small Scale Fisheries is a book about stock assessment as it is practiced. It focuses on applications for small scale or artisanal fisheries in developing countries, however it is not limited in applicability to tropical waters and should also be considered a resource for students of temperate fishery management problems. It incorporates a careful sample design, various mathematical models as a basis for predicting consequences for stock exploitation, and discusses the impact of exploitation on non-targeted species. This was a unique concept involving a collaborative effort between U.S. and host country scientists to address issues of regional and global concern through innovative research. Unlike other books on stock assessment that show mathematical models, this is the only book of its kind that discusses how an assessment is carried out. It looks at the field as a whole and includes sampling, age determination and acoustics. The book represents the culmination of a nine-year program financed by the United States Agency for International Development to provide new or improved methods of stock assessment for artisanal fisheries.

Stock Assessment for Fishery Management

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Publisher : Food & Agriculture Org.
ISBN 13 : 9789251055038
Total Pages : 284 pages
Book Rating : 4.0/5 (55 download)

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Book Synopsis Stock Assessment for Fishery Management by : Daniel D. Hoggarth

Download or read book Stock Assessment for Fishery Management written by Daniel D. Hoggarth and published by Food & Agriculture Org.. This book was released on 2006 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Report of the Second Advisory Roundtable on the Assessment of Inland Fisheries, Rome, 25–27 November 2019

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Publisher : Food & Agriculture Org.
ISBN 13 : 9251336490
Total Pages : 58 pages
Book Rating : 4.2/5 (513 download)

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Book Synopsis Report of the Second Advisory Roundtable on the Assessment of Inland Fisheries, Rome, 25–27 November 2019 by : Food and Agriculture Organization of the United Nations

Download or read book Report of the Second Advisory Roundtable on the Assessment of Inland Fisheries, Rome, 25–27 November 2019 written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2021-01-08 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second Advisory Roundtable on the Assessment of Inland Fisheries was convened in partnership with United States Geological Service (USGS), from 25 to 27 November 2019. It reviewed the progress of work that had been initiated as a response to the recommendations of the “Advisory Roundtable on the Assessment of Inland Fisheries” that was convened in partnership with the United States Geological Service (USGS) and Michigan State University (MSU) in FAO Rome, from 8 to 10 May 2018. The Second Roundtable covered two aspects of the assessment of inland fisheries. As its first task, the Roundtable reviewed a threat mapping framework developed by USGS and the University of Florida, which seeks to provide a robust assessment method for inland fisheries and the associated ecosystems/basins upon which they depend. This is intended to support the management of aquatic systems and the continued delivery of ecosystem services. The status map that the analysis provides is a visual (and quantifiable) relative indication of the levels of anthropogenic and natural environmental pressures to inland fisheries at the basin or sub-basin level. Five major threats to inland fisheries (and their 21 sub-threat categories) were scored according to global studies and modeling.

Review of Northeast Fishery Stock Assessments

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Publisher : National Academies Press
ISBN 13 : 0309591651
Total Pages : 137 pages
Book Rating : 4.3/5 (95 download)

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Book Synopsis Review of Northeast Fishery Stock Assessments by : Committee to Review Northeast Fishery Stock Assessments

Download or read book Review of Northeast Fishery Stock Assessments written by Committee to Review Northeast Fishery Stock Assessments and published by National Academies Press. This book was released on 1998-05-01 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Length-based Methods in Fisheries Research

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Publisher : WorldFish
ISBN 13 : 9711022281
Total Pages : 463 pages
Book Rating : 4.7/5 (11 download)

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Book Synopsis Length-based Methods in Fisheries Research by : Daniel Pauly

Download or read book Length-based Methods in Fisheries Research written by Daniel Pauly and published by WorldFish. This book was released on 1987 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specific aims of the conference were: to identify the specific features of sampling schemes used to obtain length-frequency data for stock assessment; to review length-based methodologies for stock assessment of fish and aquatic invertebrates, with particular reference to their precision and accuracy; to review and test computer programs implementing length-based methods.

Computer Programs for Fish Stock Assessment

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Publisher : Food & Agriculture Org.
ISBN 13 : 9789251025949
Total Pages : 232 pages
Book Rating : 4.0/5 (259 download)

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Book Synopsis Computer Programs for Fish Stock Assessment by : Per Sparre

Download or read book Computer Programs for Fish Stock Assessment written by Per Sparre and published by Food & Agriculture Org.. This book was released on 1987 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Data-limited Research in Stock Assessment to Increase the Understanding of Fisheries Resources and Inform and Improve Management Efforts

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Author :
Publisher : Frontiers Media SA
ISBN 13 : 283252009X
Total Pages : 294 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Data-limited Research in Stock Assessment to Increase the Understanding of Fisheries Resources and Inform and Improve Management Efforts by : Giuseppe Scarcella

Download or read book Data-limited Research in Stock Assessment to Increase the Understanding of Fisheries Resources and Inform and Improve Management Efforts written by Giuseppe Scarcella and published by Frontiers Media SA. This book was released on 2023-04-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Improving Fish Stock Assessments

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Publisher : National Academies Press
ISBN 13 : 0309174406
Total Pages : 194 pages
Book Rating : 4.3/5 (91 download)

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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.

Data preparation to inform assessment and management approaches in data-limited fisheries

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Publisher : Food & Agriculture Org. [Author]
ISBN 13 : 9251387095
Total Pages : 124 pages
Book Rating : 4.2/5 (513 download)

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Book Synopsis Data preparation to inform assessment and management approaches in data-limited fisheries by : Amoroso, R.

Download or read book Data preparation to inform assessment and management approaches in data-limited fisheries written by Amoroso, R. and published by Food & Agriculture Org. [Author]. This book was released on 2024-04-26 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: In fisheries science and management, it is not uncommon that fishery data are used at “face value”, as inputs into data-limited assessments or empirical indicator-based frameworks for management, without first conducting a thorough exploration and critical review of the data. [Author] This practice may lead to biases in results and misdirected fishery management actions. [Author] To address intermediate steps between data collection and any analysis used to inform stock status, this manual provides guidance on how to prepare, explore and critically review fishery data in data-limited situations. [Author] Throughout the manual, guidance and sample data are provided primarily in Microsoft Excel or in comma separated value (CSV) file formats, as well as through FishualizeR, a publicly available, web-based, R Shiny app that was developed to support the manual. [Author] Instructions in this manual are not intended to present a single, prescriptive path, but rather to provide guidance that may be further tailored to each individual context. [Author] It is the authors’ hope and intent that the guidance contained in this manual will allow users to better understand their data, make corrections, and gain a deeper understanding of the data’s utility in assessment and management of data-limited fisheries. [Author]

Introduction to Tropical Fish Stock Assessment

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Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Introduction to Tropical Fish Stock Assessment by : Per Sparre

Download or read book Introduction to Tropical Fish Stock Assessment written by Per Sparre and published by . This book was released on 1998 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Exploration and Utilization of Marine and Freshwater High-Value Biological Resources

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Publisher : Frontiers Media SA
ISBN 13 : 2832528260
Total Pages : 119 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Exploration and Utilization of Marine and Freshwater High-Value Biological Resources by : Shuhao Huo

Download or read book Exploration and Utilization of Marine and Freshwater High-Value Biological Resources written by Shuhao Huo and published by Frontiers Media SA. This book was released on 2023-10-16 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine/freshwater biological resources are of great economic, social and ecological value. Aquatic ecosystems, mainly formed by aquatic biological resources, play an important role in maintaining material circulation, energy flow, and environmental purification. Efficient, safe, sustainable utilization and high-value development of marine/freshwater biological resources, thereby promoting grain security, food security, and environmental security, has been a long term research focus. It is one of the most practical and innovative fields in global scientific and technological innovation and an effective way to solve the major problems restricting human resources shortage.

Stock Assessment

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Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis Stock Assessment by :

Download or read book Stock Assessment written by and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: