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Sampling For Estimating Growth Parameters In Fish Populations
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Book Synopsis Sampling for Estimating Growth Parameters in Fish Populations by : Maria Margarida Miranda De Castro
Download or read book Sampling for Estimating Growth Parameters in Fish Populations written by Maria Margarida Miranda De Castro and published by . This book was released on 1992 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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.
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 The Accuracy of Some Length-based Methods for Fish Population Studies by : Victoria J. Isaac
Download or read book The Accuracy of Some Length-based Methods for Fish Population Studies written by Victoria J. Isaac and published by WorldFish. This book was released on 1990 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computation and Interpretation of Biological Statistics of Fish Populations by : William Edwin Ricker
Download or read book Computation and Interpretation of Biological Statistics of Fish Populations written by William Edwin Ricker and published by . This book was released on 1978 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fish Population Dynamics in Tropical Waters by : Daniel Pauly
Download or read book Fish Population Dynamics in Tropical Waters written by Daniel Pauly and published by WorldFish. This book was released on 1984-01-01 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Simple Methods for the Assessment of Tropical Fish Stocks by : Daniel Pauly
Download or read book Some Simple Methods for the Assessment of Tropical Fish Stocks written by Daniel Pauly and published by Food & Agriculture Org.. This book was released on 1983 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This selection of methods is based on lecture notes used at a FAO/DANIDA training course held in Mombasa, Kenya, in May-June 1980. The methods presented are: regression and correlation, estimation of growth parameters from length-frequency data, estimation of mortalities (total, natural, fishing mortality) and analysis of catch and effort data. A brief annotated bibliography of tropical fish stock assessment is included.
Book Synopsis Sampling Methods Applied to Fisheries Science by : Emygdio L. Cadima
Download or read book Sampling Methods Applied to Fisheries Science written by Emygdio L. Cadima and published by Food & Agriculture Org.. This book was released on 2005 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this manual is to present the basic and standard concepts of sampling methods applied to fisheries science. In order to ensure sound fisheries research, it is essential to have reliable data from landing ports, fishery stocks and research surveys. A rational management of fishing resources can then be established to ensure a sustainable exploitation rate and responsible fisheries management, providing long-term benefits for all. This document provides an introduction to sampling theory and introduces the theory of the three worlds (population, sample and sampling), as well as a short revision of probability concepts. It also provides an overview of the simple random, random stratified, cluster and two-stage sampling methods. The expressions for estimating the mean and total of the populations, their sampling distributions, the expected values, the sampling variances and their estimates are included and justified for each of the sampling designs. The document also contains a case study of biological sampling from landing ports and exercises that should be used to further understanding of the objectives of sampling and its advantages for fishery resource studies.
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.
Book Synopsis From Somatic Growth to Community Structure of Marine Fishes by : Derek Gordon Bolser
Download or read book From Somatic Growth to Community Structure of Marine Fishes written by Derek Gordon Bolser and published by . This book was released on 2021 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The life history traits, population dynamics, and community ecology of marine fishes vary along spatio-temporal gradients in environmental conditions and habitat (i.e. physical conditions). Accordingly, incorporating physical drivers into fisheries assessments can improve fishery management advice, and thus the sustainability of fisheries. However, collective inferences on the effects that physical conditions have on fishes can be difficult to draw due to confounding effects of scale, sampling procedure, gear type, and other aspects of methodology. Here, I examined the role of physical drivers and methodological biases in explaining variation in aspects of fish populations and communities across levels of biotic organization. In the first study contained in this dissertation, I employed simulations to demonstrate the influence of sample distribution on growth parameter estimates and per-recruit assessment for the Gulf Corvina (Cynoscion othonopterus) in the Gulf of California. Sample distribution could confound growth parameter estimates in conventional assessments, and is especially important to account for when documenting spatio-temporal variation in growth, as sample distributions are rarely consistent over time and space. In the second, I described the effects – or lack thereof – of physical conditions on the distributions of common petroleum platform-associated fish species in the Gulf of Mexico through large-scale submersible camera sampling. In the third, I combined camera and hydroacoustic data to characterize water-column fish communities at petroleum platforms and identified the dominant physical drivers that shape them. In the fourth, I examined the challenges of assessing fish community size spectra with hydroacoustics in rugose marine habitats. Assessing the size spectra of fish communities over time and space is useful for understanding the effects of physical conditions and anthropogenic activities on community structure, and using hydroacoustic technology allows size spectra to be assessed more rapidly and efficiently than conventional methods. The findings and approaches described in this dissertation may be used to understand variation in fish growth, distribution, abundance, and community structure in response to physical drivers, thereby making spatial and ecosystem considerations more accessible to fisheries assessment and management frameworks
Book Synopsis Modelling and Quantitative Methods in Fisheries by : Malcolm Haddon
Download or read book Modelling and Quantitative Methods in Fisheries written by Malcolm Haddon and published by CRC Press. This book was released on 2001-05-31 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative methods and mathematical modelling are of critical importance to fishery science and management but, until now, there has been no book that offers the sharp focus, methodological detail, and practical examples needed by non-specialist fishery scientists and managers, and ecologists. Modelling and Quantitative Methods in Fisheries fills that void. To date, methodology books in fisheries science have been limited to cookbook approach to problems; simple compilations; or expositions in which either too much theory or insufficient methodological detail is given. The text is organized into three sections: an introduction to modelling in fisheries and ecology, a straight methodology section covering a range of methods, and a section focusing on specific fields in fisheries science. This book is timely as it addresses a topic of recent debate in fisheries and ecology, describing and comparing the uses of Least Squares, Maximum Likelihood, and Bayesian quantitative methods. Designed as stand-alone units, each chapter provides examples from both classic and recent literature and comes with dedicated Excel spreadsheets that permit you to delve into every detail of the analysis. All of these spreadsheets serve as active examples, which can easily be modified and customized and can be used as templates for analyzing your own data. The spreadsheets permit you to learn at your own speed and cover the simplest linear regression to the more complex non-linear modelling using maximum likelihood. Data analysis and modelling are best learned by doing and not just by reading. This book illustrates, step by step, the analyses it covers. More detailed in terms of introductory quantitative methods and modelling as applied to fisheries than any other book available, Modelling and Quantitative Methods in Fisheries gives you the advantage by supplying the full details of the analysis so that understanding the material is a matter of following the book.
Book Synopsis Quantitative Fish Dynamics by : Terrance J. Quinn
Download or read book Quantitative Fish Dynamics written by Terrance J. Quinn and published by Oxford University Press, USA. This book was released on 1999 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fields of fish population dynamics and stock assessment have seen major advances in the 1980s and 1990s, creating the need for a new synthesis. This text attempts that synthesis by presenting a contemporary approach for quantitative fisheries science that incorporates modern statistical and mathematical techniques. It emphasizes the link between biology and theory by explaining the assumptions inherent in the quantitative methods and models. The book covers key topics that are often overlooked in other texts, such as optimal harvesting, migratory stocks, and complex age and size-structured models. Quantitative Fish Dynamics is an ideal textbook for graduate and undergraduate courses in fish population dynamics and stock assessment. It is an indispensable reference work for fisheries scientists and others interested in conservation biology, fish and wildlife management, population ecology, and statistical applications.
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.
Book Synopsis Fish Population Dynamics by : J. A. Gulland
Download or read book Fish Population Dynamics written by J. A. Gulland and published by John Wiley & Sons. This book was released on 1977 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how the dynamics of fish populations can be analysed in terms of the factors affecting their rates of growth, mortality and reproduction, with particular emphasis on the effects of fishing. Chapters on individual species or families of fish describe how the methods have been applied to some of the major fisheries of the world. The book gives an understanding of some of the changes that have taken place in the fisheries and provides guidance on the proper conservation an management of these important resources. This book is the first attempt to bring together in a single volume both theoretical methods and practical experience in a wide range of fisheries.
Book Synopsis Standard Methods for Sampling North American Freshwater Fishes by : Scott A. Bonar
Download or read book Standard Methods for Sampling North American Freshwater Fishes written by Scott A. Bonar and published by . This book was released on 2009 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This was the first effort to standardize methods for inland fish sampling across North America and, as such, was a joint effort contributed to by a large group of talented and dedicated individuals, in addition to the authors and coeditors. While these sampling methods were primarily developed for North America, most could be used with little or no modification in other areas of the world. Those involved with standard sampling efforts in North America would welcome the opportunity to collaborate with scientists from other regions to develop methods to share data worldwide.
Book Synopsis Comparison Efficiencies of Three Sampling Techniques for Estimating Fish Populations in Small Streams by : William G. Layher
Download or read book Comparison Efficiencies of Three Sampling Techniques for Estimating Fish Populations in Small Streams written by William G. Layher and published by . This book was released on 1984 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
