Sampling Methods Applied To Fisheries Science

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Sampling Methods Applied To Fisheries Science

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Author : Emygdio L. Cadima
language : en
Publisher: Food & Agriculture Org.
Release Date : 2005-01-01

Sampling Methods Applied To Fisheries Science 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 2005-01-01 with Technology & Engineering categories.

This study summarizes the main concepts involved in the assessment and management of fishing capacity. It discusses why capacity management and the problem of overcapacity have become key issues for fisheries management in the new millennium. The paper explains why overcapacity develops in the fishery and the role that fisheries management has played in contributing to this development in the past. Methods for estimating current and desired levels of capacity are discussed, and a range of potential indicators of overcapacity is described. The effectiveness of various capacity management programmes that have been applied in various fisheries around the world is also discussed, along with an explanation as to why many of these programmes have been ineffective. Potential management systems that have proven effective in reducing overcapacity are also presented and discussed.

Manual Of Fisheries Sampling Surveys

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Author : Evelina Sabatella
language : en
Publisher: Food & Agriculture Org.
Release Date : 2004-01-01

Manual Of Fisheries Sampling Surveys written by Evelina Sabatella 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 2004-01-01 with Technology & Engineering categories.

This manual contains guidance on data collection methods for developing socio-economic indicators, and it can be used to facilitate and simplify reporting under international conventions and agreements on matters relating to the sustainable fisheries development. The methodologies can be applied to fisheries at many different levels, from individual fisheries and coastal management units to a global level, and it aims to encourage consistent use of statistical methods in data collection.

Concepts And Controversies In Tidal Marsh Ecology

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Author : M.P. Weinstein
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08

Concepts And Controversies In Tidal Marsh Ecology written by M.P. Weinstein 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 2007-05-08 with Science categories.

In 1968 when I forsook horticulture and plant physiology to try, with the help of Sea Grant funds, wetland ecology, it didn’t take long to discover a slim volume published in 1959 by the University of Georgia and edited by R. A. Ragotzkie, L. R. Pomeroy, J. M. Teal, and D. C. Scott, entitled “Proceedings of the Salt Marsh Conference” held in 1958 at the Marine Institute, Sapelo Island, Ga. Now forty years later, the Sapelo Island conference has been the major intellectual impetus, and another Sea Grant Program the major backer, of another symposium, the “International Symposium: Concepts and Controversies in Tidal Marsh Ecology”. This one re-examines the ideas of that first conference, ideas that stimulated four decades of research and led to major legislation in the United States to conserve coastal wetlands. It is dedicated, appropriately, to two then young scientists – Eugene P. Odum and John M. Teal – whose inspiration has been the starting place for a generation of coastal wetland and estuarine research. I do not mean to suggest that wetland research started at Sapelo Island. In 1899 H. C. Cowles described successional processes in Lake Michigan freshwater marsh ponds. There is a large and valuable early literature about northern bogs, most of it from Europe and the former USSR, although Eville Gorham and R. L. Lindeman made significant contributions to the American literature before 1960. V. J.

Stock Identification Methods

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Author : Steven X. Cadrin
language : en
Publisher: Academic Press
Release Date : 2013-10-04

Stock Identification Methods written by Steven X. Cadrin and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-04 with Technology & Engineering categories.

Stock Identification Methods, 2e, continues to provide a comprehensive review of the various disciplines used to study the population structure of fishery resources. It represents the worldwide experience and perspectives of experts on each method, assembled through a working group of the International Council for the Exploration of the Sea. The book is organized to foster interdisciplinary analyses and conclusions about stock structure, a crucial topic for fishery science and management. Technological advances have promoted the development of stock identification methods in many directions, resulting in a confusing variety of approaches. Based on central tenets of population biology and management needs, this valuable resource offers a unified framework for understanding stock structure by promoting an understanding of the relative merits and sensitivities of each approach. - Describes 18 distinct approaches to stock identification grouped into sections on life history traits, environmental signals, genetic analyses, and applied marks - Features experts' reviews of benchmark case studies, general protocols, and the strengths and weaknesses of each identification method - Reviews statistical techniques for exploring stock patterns, testing for differences among putative stocks, stock discrimination, and stock composition analysis - Focuses on the challenges of interpreting data and managing mixed-stock fisheries

Design Change To Fishery Independent Surveys When To Adjust And How To Account For It

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Author : Fabio Campanella
language : en
Publisher: Frontiers Media SA
Release Date : 2025-03-07

Design Change To Fishery Independent Surveys When To Adjust And How To Account For It written by Fabio Campanella and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-07 with Science categories.

Fishery independent surveys provide crucial information for monitoring and assessing marine fish stocks. Their utility can largely be attributed to sampling procedures that are consistent across space and time, such that observed dynamics can reasonably be assumed to reflect those of the population or community being studied. However, sometimes changes to the survey design become desirable or necessary. They may be desirable if the benefits of modification outweigh the benefits of consistency, for example, with improvements in sampling technology or efficiency, revised survey priorities, or increased funding that allows for greater spatial coverage or temporal resolution. In other cases, changes to the survey design may not be desirable but necessary, for example, when specific supplies or equipment become unobtainable, or with reductions in funding, ship time, or human resources.

Sampling And Analytical Methods Of The National Status And Trends Program National Benthic Surveillance And Mussel Watch Projects 1984 1992 Comprehensive Descriptions Of Trace Organic Qanalytical Methods

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Author : G. G. Lauenstein
language : en
Publisher:
Release Date : 1993

Sampling And Analytical Methods Of The National Status And Trends Program National Benthic Surveillance And Mussel Watch Projects 1984 1992 Comprehensive Descriptions Of Trace Organic Qanalytical Methods written by G. G. Lauenstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Environmental monitoring categories.

Better Data Collection In Shark Fisheries Learning From Practice

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Author : Food and Agriculture Organization of the United Nations
language : en
Publisher: Food & Agriculture Org.
Release Date : 2021-07-07

Better Data Collection In Shark Fisheries Learning From Practice written by Food and Agriculture Organization of the United Nations 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 2021-07-07 with Technology & Engineering categories.

Some species and stocks of sharks, rays, skates, and chimaeras (termed shark in this review) are rapidly depleting due to climate change, land-based influences, and overfishing. These pressures, coupled with sharks’ low reproductive potential (slow growth and delayed maturation; long reproductive cycles; low fecundity; and long lifespans) place sharks in a risk profile that is more akin to mammals on land than fish in the ocean. The development of policy, and the delivery of management and conservation measures regulating the use, international trade, and capture of sharks (whether as a targeted species or as bycatch in fisheries), is hindered by gaps in basic knowledge – a knowledge that is required in order to get a clear sense of their status in real-time. Many countries are establishing or strengthening monitoring across shark value chains to overcome these shortfalls in information. This document reviews what shark fisheries data is being collected, highlighting the opportunities and constraints in collecting information on sharks in fisheries, based on practical experience. It includes information from 28 surveys across 19 countries: 9 in the Mediterranean, 5 in Africa, 3 in Asia, and 1 in Oceania. Interviews were conducted with data collectors and managers across the entirety of the survey process, while data collection variables were documented in order to inform those interested in the collection, provision, and exchange of shark information on common practices and their commonalities. The review identifies standardized information metrics which, if collected more generally, would strengthen the opportunity for harmonized reporting and cross-comparability across surveys. In addition – and in order to assess the status quo – the current data collection requirements of management measures applied to sharks by regional fisheries management organizations (RFMOs) were reviewed, including “no retention” measures. Finally, the review proposes a list of the minimum standard measurements and common life-history parameters required to support the assessment of shark stocks in fisheries.

Fisheries Techniques

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Author : Larry A. Nielsen
language : en
Publisher:
Release Date : 1983

Fisheries Techniques written by Larry A. Nielsen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Technology & Engineering categories.

Strategies For Managing Fish Populations

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Author : Bhaswar Prajapat
language : en
Publisher: Educohack Press
Release Date : 2025-02-20

Strategies For Managing Fish Populations written by Bhaswar Prajapat and has been published by Educohack Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-02-20 with Science categories.

"Strategies for Managing Fish Populations" is a comprehensive guide that explores various strategies for sustainable fish population management. We address the complex dynamics of fisheries management, tackling issues such as overfishing, habitat degradation, and the need for conservation. Our book provides insights into the diverse challenges faced by fisheries managers and offers practical solutions. We examine the detrimental effects of overfishing on fish populations and marine ecosystems, highlighting the urgency of preventing further depletion. The importance of protecting critical habitats and minimizing fishing impacts is discussed in detail. We emphasize the role of regulatory agencies and collaborative governance in implementing effective measures, including fishing regulations, monitoring programs, and enforcement mechanisms. We also highlight the integration of aquaculture with traditional fisheries to reduce pressure on wild fish stocks and promote sustainable fish production. Featuring case studies from around the world, our book showcases successful fisheries management initiatives and best practices, providing real-world examples of effective strategies. This invaluable resource is designed for fisheries managers, policymakers, researchers, conservationists, and anyone interested in sustainable fish population management.

Risks Threats And Conservation Status Of Cetaceans In The Mediterranean And Black Seas

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Author : Roberto Carlucci
language : en
Publisher: Frontiers Media SA
Release Date : 2024-02-14

Risks Threats And Conservation Status Of Cetaceans In The Mediterranean And Black Seas written by Roberto Carlucci and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-02-14 with Science categories.