Effects of Trawling and Dredging on Seafloor Habitat
Effects of Trawling and Dredging on Seafloor Habitat

Author: National Research Council

Publisher: National Academies Press

Published: 2002-08-09

Total Pages: 137

ISBN-13: 0309083400

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Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.

The Fisheries Co-management Experience
The Fisheries Co-management Experience

Author: Douglas Clyde Wilson

Publisher: Springer Science & Business Media

Published: 2013-03-09

Total Pages: 324

ISBN-13: 9401733236

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For two decades the idea of governments and fishers working together to manage fisheries has been advocated, questioned, disparaged and, most importantly, attempted in fisheries from North and South America through Europe, Africa, Asia and Oceania. This book is the first time these experiences have been pulled together in a single volume, summarized and explained. The Fisheries Co-management Experience begins with a review of the intellectual foundations of the co-management idea from several professional perspectives. Next, fisheries researchers from six global regions describe what has been happening on the ground in their area. Finally, the volume offers a set of reflections by some of the best authors in the field. The end result describes both the state-of-the-art and emerging issues for one of the most important trends in natural resources management.

Improving Fish Stock Assessments
Improving Fish Stock Assessments

Author: National Research Council

Publisher: National Academies Press

Published: 1998-02-27

Total Pages: 194

ISBN-13: 0309174406

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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.

Sample-based Fishery Surveys
Sample-based Fishery Surveys

Author: Constantine Stamatopoulos

Publisher: Fao

Published: 2002

Total Pages: 148

ISBN-13:

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This handbook summarises the experience gained over recent years in fishery statistical development by the Fishery Information, Data and Statistics Unit of the FAO, and provides guidance for developing and implementing cost-effective and sustainable fishery surveys. The methodological and operational concepts discussed apply equally to marine and inland capture fisheries. The emphasis is placed on the understanding and interpretation of the statistics, rather than on the computations producing them.

FISHES GULF MAINE ED 3E
FISHES GULF MAINE ED 3E

Author: Collette Bb

Publisher: Smithsonian

Published: 2002-06-17

Total Pages: 748

ISBN-13: 9781560989516

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Fifteen years in the making, this updated edition raises the high standard of Bigelow and Schroeder's 1953 reference by drawing from a much larger base of information. Thirty-eight experts in fisheries biology and ichthyology clearly distill the enormous amount of knowledge gained during the past fifty years, including distribution figures from thirty years of annual trawl surveys; food habit accounts from surveys of the stomach contents of more than 30,000 fishes; and egg distribution data from a survey exceeding 10,000 samples. The contributors update Bigelow and Schroeder's 1953 material while presenting a wealth of new information, including thirty-three additional species accounts. By adding fifty percent more material and focusing the volume on data, the editors address the needs of today's biologists, the commercial fishing industry, and marine enthusiasts, and ensure that Bigelow and Schroeder's Fishes of the Gulf of Maine, Third Edition, will become the standard work in the field for the next fifty years.

Report
Report

Author: United States. Bureau of Fisheries

Publisher:

Published: 1921

Total Pages: 664

ISBN-13:

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