Revised and restructured, Modeling and Quantitative Methods in Fisheries, Second Edition provides an accessible introduction to quantitative methods in fisheries. This book features new material on tests and comparisons as well as new chapters on length-based models and estimating uncertainty using Bayesian methods. It presents a structured, step-by-step approach that introduces the material in a logical sequence. This text covers a range of topics such as simple linear regression, complex nonlinear modeling, methodology, and specific fields in fisheries. It also includes numerous real world examples implemented in Excel, with workbooks for all examples available for download on the web.
With numerous real-world examples, Modelling and Quantitative Methods in Fisheries, Second Edition provides an introduction to the analytical methods used by fisheries’ scientists and ecologists. By following the examples using Excel, readers see the nuts and bolts of how the methods work and better understand the underlying principles. Excel workbooks are available for download from CRC Press website. In this second edition, the author has revised all chapters and improved a number of the examples. This edition also includes two entirely new chapters: Characterization of Uncertainty covers asymptotic errors and likelihood profiles and develops a generalized Gibbs sampler to run a Markov chain Monte Carlo analysis that can be used to generate Bayesian posteriors Sized-Based Models implements a fully functional size-based stock assessment model using abalone as an example This book continues to cover a broad range of topics related to quantitative methods and modelling. It offers a solid foundation in the skills required for the quantitative study of marine populations. Explaining important and relatively complex ideas and methods in a clear manner, the author presents full, step-by-step derivations of equations as much as possible to enable a thorough understanding of the models and methods.
A How-To Guide for Conducting Common Fisheries-Related Analyses in R Introductory Fisheries Analyses with R provides detailed instructions on performing basic fisheries stock assessment analyses in the R environment. Accessible to practicing fisheries scientists as well as advanced undergraduate and graduate students, the book demonstrates the flexibility and power of R, offers insight into the reproducibility of script-based analyses, and shows how the use of R leads to more efficient and productive work in fisheries science. The first three chapters present a minimal introduction to the R environment that builds a foundation for the fisheries-specific analyses in the remainder of the book. These chapters help you become familiar with R for basic fisheries analyses and graphics. Subsequent chapters focus on methods to analyze age comparisons, age-length keys, size structure, weight-length relationships, condition, abundance (from capture-recapture and depletion data), mortality rates, individual growth, and the stock-recruit relationship. The fundamental statistical methods of linear regression, analysis of variance (ANOVA), and nonlinear regression are demonstrated within the contexts of these common fisheries analyses. For each analysis, the author completely explains the R functions and provides sufficient background information so that you can confidently implement each method. Web Resource The author’s website at http://derekogle.com/IFAR/ includes the data files and R code for each chapter, enabling you to reproduce the results in the book as well as create your own scripts. The site also offers supplemental code for more advanced analyses and practice exercises for every chapter.
This collection addresses the central question of how the current international framework for the regulation of fisheries may be strengthened in order to meet the challenges posed by changing fisheries and ocean conditions, in particular climate change. International fisheries law has developed significantly since the 1990s, through the adoption and establishment of international instruments and bodies at the global and regional levels. Global fish stocks nevertheless remain in a troubling state, and fisheries management authorities face a wide array of internal and external challenges, including operational constraints, providing effective management advice in the face of scientific uncertainty and non-compliance by States with their international obligations. This book examines these challenges and identifies options and pathways to strengthen international fisheries law. While it has a primarily legal focus, it also features significant contributions from specialists drawn from other disciplines, notably fisheries science, economics, policy and international relations, in order to provide a fuller context to the legal, policy and management issues raised. Rigorous and comprehensive in scope, this will be essential reading for lawyers and non-lawyers interested in international fisheries regulation in the context of profoundly changing ocean conditions.
This publication presents guidelines on the requirements for responsible management of the fisheries exploiting Caribbean queen conch (Strombus gigas), with particular emphasis on the requirements to comply with the relevant regulations of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). This manual describes the basic fisheries management cycle which includes: development and interpretation of policy; the need for management controls to regulate fishing activities; data collection and analysis; decision-making; enforcement of and compliance with the management controls; and regular feedback and review of the management system. It provides general guidance on each of those steps for the queen conch fisheries of the Caribbean. It also provides three examples of management systems for industrial, artisanal and non-directed fisheries.--Publisher's description.
This second edition covers topics essential to the study of fish genetics, including qualitative and quantitative traits, crossbreeding, inbreeding, genetic drift, hybridization, selection programs, polyploidy, genomics and cloning. Fully updated and tailored for students with a new layout and format, "Aquaculture and Fisheries Biotechnology and Genetics" also addresses environmental risk, food safety and government regulation of transgenic aquatic organisms, commercial applications of fish biotechnology and future issues in fish genetics. It is essential reading for students of fish genetics and fish molecular genetics.
Quantitative modeling methods have become a central tool in the management of harvested fish populations. This book examines how these modeling methods work, why they sometimes fail, and how they might be improved by incorporating larger ecological interactions. Fisheries Ecology and Management provides a broad introduction to the concepts and quantitative models needed to successfully manage fisheries. Walters and Martell develop models that account for key ecological dynamics such as trophic interactions, food webs, multi-species dynamics, risk-avoidance behavior, habitat selection and density-dependence. They treat fisheries policy development as a two-stage process, first identifying strategies for varying harvest in relation to changes in abundance, then finding ways to implement such strategies in terms of monitoring and regulatory procedures. This book provides a general framework for developing assessment models in terms of state-observation dynamics hypotheses, and points out that most fisheries assessment failures have been due to inappropriate observation model hypotheses rather than faulty models for ecological dynamics. Intended as a text in upper division and graduate classes on fisheries assessment and management, this useful guide will also be widely read by ecologists and fisheries scientists.
This textbook aims to capture the spirit of the new fisheries management, in that it is driven by a recognition of the dynamic nature of fish populations and the application of computers and systems analysis to fisheries problems. It contains detailed numerical methods for parameter estimation, confidence bounds, and the formulation of harvesting strategies. The book builds upon the three themes in the subtitle. Choice refers to alternative management actions and alternative models. Dynamics reviews basic concepts of ecology and the interactions between fish and fishermen, as the latter respond to biological variability and to economic opportunity and regulation. Uncertainty describes the all-pervasive feature of fish stocks assessment. This text, written by two authorities in the field, should also become a standard reference in the area for professionals. A diskette including relevant programs is also included with this book.
This paper is based on a study that identifies the major causes of detentions and rejections of fishery products in international trade and assesses the control procedures used by the main importing countries/regions of Canada, the EU, Japan and the USA. The final section makes recommendations on what needs to change to improve fish safety and quality controls.