Download or read book Estimating Similarity in Benthic Communities of Open and Closed Areas in the Central Gulf of Maine Focusing on Sea Scallop Mortality written by Samuel C. Asci and published by . This book was released on 2016 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major ledges and bank of the central Gulf of Maine (i.e. Fippennies Ledge, Jefferys Ledge, Cashes Ledge, and Platts Bank) have supported economically vital groundfish and Atlantic sea scallop (Placopecten magellanicus) fisheries for centuries. The benthic community structure of Fippennies Ledge was compared between observations made in a series of manned- submersible photographic dives conducted in 1986-1987, and observations made by the School for Maine Science and Technology drop camera video survey in 2009, 2010, 2011, 2013, and 2014. This area and others (Jefferys and Cashes Ledge) were permanently closed to fishing in 2002, while Platts Bank has remained open. We examined the benthic communities of these ares, and described their similarity with particular focus on scallop density and distribution. The strong year class of scallops first observed in these areas in 2009 was tracked through time, allowing for estimates of instantaneous natural mortality to be made for scallops in the fished and unfished areas. In addition to natural mortality, understanding change in benthic community structure over almost three decades, as well as how similar open and closed areas are will be important to consider as the uncertain future of commercial fishing in the central Gulf of Maine is being decided.
Download or read book Ocean Acidification written by National Research Council and published by National Academies Press. This book was released on 2010-09-14 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ocean has absorbed a significant portion of all human-made carbon dioxide emissions. This benefits human society by moderating the rate of climate change, but also causes unprecedented changes to ocean chemistry. Carbon dioxide taken up by the ocean decreases the pH of the water and leads to a suite of chemical changes collectively known as ocean acidification. The long term consequences of ocean acidification are not known, but are expected to result in changes to many ecosystems and the services they provide to society. Ocean Acidification: A National Strategy to Meet the Challenges of a Changing Ocean reviews the current state of knowledge, explores gaps in understanding, and identifies several key findings. Like climate change, ocean acidification is a growing global problem that will intensify with continued CO2 emissions and has the potential to change marine ecosystems and affect benefits to society. The federal government has taken positive initial steps by developing a national ocean acidification program, but more information is needed to fully understand and address the threat that ocean acidification may pose to marine ecosystems and the services they provide. In addition, a global observation network of chemical and biological sensors is needed to monitor changes in ocean conditions attributable to acidification.
Download or read book Effects of Trawling and Dredging on Seafloor Habitat written by National Research Council and published by National Academies Press. This book was released on 2002-08-09 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Scallops written by Sandra E. Shumway and published by Elsevier. This book was released on 2016-06-07 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scallops: Biology, Ecology, Aquaculture and Fisheries, Third Edition, continues its history as the definitive resource on scallops, covering all facets of scallop biology, including anatomy, taxonomy, physiology, ecology, larval biology, and neurobiology. More than thirty extensive chapters explore both fisheries and aquaculture for all species of scallops in all countries where they are fished or cultured. This treatise has been updated to include the most recent advances in research and the newest developments within the industry. As aquaculture remains one of the fastest-growing animal food-producing sectors, this reference becomes even more vital. It has all the available information on scallops needed to equip researchers to deal with the unique global issues in the field. - Offers 30 detailed chapters on the development and ecology of scallops - Provides chapters on various cultures of scallops in China, Japan, Scandinavia, Europe, Eastern North America, and Western North America - Includes details of scallop reproduction, nervous system, and behavior, genetics, diseases, parasites, and much more - Completely updated edition with valuable information on one of the most widely distributed shellfish in the world
Download or read book Bottom Trawling and Scallop Dredging in the Arctic written by Elena Guijarro Garcia and published by Nordic Council of Ministers. This book was released on 2007 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sustaining Marine Fisheries written by National Research Council and published by National Academies Press. This book was released on 1999-03-19 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluctuations and declines in marine fish populations have caused growing concern among marine scientists, fisheries managers, commercial and recreational fishers, and the public. Sustaining Marine Fisheries explores the nature of marine ecosystems and the complex interacting factors that shape their productivity. The book documents the condition of marine fisheries today, highlighting species and geographic areas that are under particular stress. Challenges to achieving sustainability are discussed, and shortcomings of existing fisheries management and regulation are examined. The volume calls for fisheries management to adopt a broader ecosystem perspective that encompasses all relevant environmental and human influences. Sustaining Marine Fisheries offers new approaches to building workable fisheries management institutions, improving scientific data, and developing management tools. The book recommends ways to change current practices that encourage overexploitation of fish resources. It will be of special interest to marine policymakers and ecologists, fisheries regulators and managers, fisheries scientists and marine ecologists, fishers, and concerned individuals.
Download or read book World Atlas of Seagrasses written by Frederick T. Short and published by Univ of California Press. This book was released on 2003 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seagrasses are a vital and widespread but often overlooked coastal marine habitat. This volume provides a global survey of their distribution and conservation status.
Download or read book Impacts of climate change on fisheries and aquaculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-01-06 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.
Download or read book Ecology of Buzzards Bay An Estuarine Profile written by Dale D. Goehringer and published by Palala Press. This book was released on 2018-02-20 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book FAO ICLARM stock assessment tools written by F. C. Gayanilo and published by Food & Agriculture Org.. This book was released on 1997 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shifting Gears written by Lance Edward Morgan and published by . This book was released on 2003 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploitation of Marine Communities written by Robert M. May and published by Springer. This book was released on 1984 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for the Study of Marine Benthos written by Anastasios Eleftheriou and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecosystems of the benthic environment are a sensitive index toecological change, and as such demand long-term and effectivemonitoring. Methods for the Study of Marine Benthos providescomprehensive information on the tools and techniques available tothose working in areas where the declining health of the sea,depletion of marine resources and the biodiversity of marine lifeare major concerns. In response to the need for increasingly detailed information onbottom-living communities, this fully revised new editionoffers: Contributions from a broad range of internationally recognisedexperts New information for those compiling environmental impactstatements, pollution assessments and working with eco-systemmanagement Two separate chapters on Imaging Techniques and DivingSystems A vital tool for all marine and environmental scientists,ecologists, fisheries workers and oceanographers, libraries in alluniversities and research establishments where these subjects arestudied and taught will find this book a valuable addition to theirshelves.
Download or read book Guide to Best Practices for Ocean Acidification Research and Data Reporting written by and published by . This book was released on 2011 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fish Resources of the Ocean written by J. A. Gulland and published by . This book was released on 1971 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commercial Fisheries Licensing Policy for Eastern Canada written by Canada. Department of Fisheries and Oceans and published by . This book was released on 1990 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This policy document provides fishermen, companies, and other interested Canadians with a clear, consistent statement of Fisheries and Oceans policy respecting the registration of commercial fishermen and vessels, and the issuance of fishing licences to persons in Eastern Canada. The policy document also provides objectives against which the approriateness and effectiveness of specific policy measures can be evaluated. The document covers the legislative background and licensing objectives; the general policy framework; vessel replacement rules for vessels less than 19.8m (65') length; appeal process and procedures; amendment procedures; and terminology used.
Download or read book The Benefits of Marine Protected Areas written by Australian Government - Department of the Environment and Heritage - Environment Australia and published by . This book was released on 2003 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
