Impacts of Trawling and Scallop Dredging on Benthic Habitats and Communities

Impacts of Trawling and Scallop Dredging on Benthic Habitats and Communities PDF

Author: Svein Løkkeborg

Publisher: Food & Agriculture Org.

Published: 2005

Total Pages: 70

ISBN-13: 9789251053256

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This publication examines recent experimental studies of the impact of towed fishing gears, such as trawls and scallop dredges, on benthic habitats and communities (organisms that live at or near the bottom of the sea). The review gives a critical evaluation of the methodological limitations of impact studies, given the complexity and natural variability of benthic communities.

Effects of Trawling and Dredging on Seafloor Habitat

Effects of Trawling and Dredging on Seafloor Habitat PDF

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.

Impacts of Trawling and Scallop Dredging on Benthic Habitats and Communities

Impacts of Trawling and Scallop Dredging on Benthic Habitats and Communities PDF

Author: Svein Løkkeborg

Publisher: FAO

Published: 2005

Total Pages: 74

ISBN-13: 9789251053256

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This publication examines recent experimental studies of the impact of towed fishing gears, such as trawls and scallop dredges, on benthic habitats and communities (organisms that live at or near the bottom of the sea). The review gives a critical evaluation of the methodological limitations of impact studies, given the complexity and natural variability of benthic communities.

The State of World Fisheries and Aquaculture 2004

The State of World Fisheries and Aquaculture 2004 PDF

Author: Food and Agriculture Organization of the United Nations

Publisher: Food & Agriculture Org.

Published: 2004

Total Pages: 172

ISBN-13: 9789251051771

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This biennial report sets out a comprehensive review of world fisheries and aquaculture, as well as examining selected policy issues including capture-based aquaculture, labour standards, fisheries management and CITES, trade issues, depleted stocks recovery, deep-water fisheries, production forecasts to 2030, fisheries subsidies, and fishing capacity. Findings include that developments in world fisheries and aquaculture during recent years have continued to follow the trends that were already becoming apparent at the end of the 1990s, with capture fisheries production stagnating, aquaculture output expanding and growing concerns with regard to safeguarding the livelihoods of fishers and the sustainability of both commercial catches and the aquatic ecosystem from which they are extracted.

The Atlantic Walrus

The Atlantic Walrus PDF

Author: Xénia Keighley

Publisher: Academic Press

Published: 2021-06-17

Total Pages: 359

ISBN-13: 0128174315

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The Atlantic Walrus: Multidisciplinary insights into human-animal interactions addresses the key dimensions of long-term human walrus interactions across the Atlantic Arctic and subarctic regions, over the past millennia. This book brings together research from across the social and natural sciences to explore walrus biology, human culture, environmental conditions and their reciprocal effects. Together, 13 chapters of this book reconstruct the early evolution of walruses, walrus biology, the cultural significance and ecological impact of prehistoric and indigenous hunting practices, as well as the effects of commercial hunting and international trade. This book also examines historic and ongoing management strategies and, the importance of new research methodologies in revealing hitherto unknown details of the past, and concludes by discussing the future for Atlantic walruses in the face of climate change and increased human activities in the Arctic. This volume is an ideal resource for those who are seeking to understand an iconic Arctic species and its long and complex relationship with humans. This includes individuals and researchers with a personal or professional connection to walruses or the Arctic, as well as marine biologists, zoologists, conservationists, paleontologists, archaeologists, anthropologists, historians, indigenous communities, natural resource managers and government agencies. Provides succinct overviews of the biology of the Atlantic Walrus (Odobenus rosmarus rosmarus) as well as human cultures within the North Atlantic Arctic and the surrounding region by consolidating research which until now has been scattered across fields and academic publications Editorial team of inter-disciplinary researchers ensuring the breadth, depth and integration of material covered throughout the volume Thirteen chapters, each authored by leading international researchers and experts on the Atlantic Walrus Considers the inter-relatedness and complexity of species biology, ecological change, human culture, and anthropogenic pressures onto the Atlantic Walrus, all while remaining accessible to readers from different disciplines or a more generalist audience Draws upon the latest methods in marine mammal and archaeological research Assesses historical management of the species, while also considering current and future conservation efforts in light of human activities and climate change Text supported by striking and insightful new maps and scientific illustrations, ideal for teaching and outreach

Options to Mitigate Bottom Habitat Impact of Dragged Gears

Options to Mitigate Bottom Habitat Impact of Dragged Gears PDF

Author: John Willy Valdemarsen

Publisher: Food & Agriculture Org.

Published: 2007

Total Pages: 44

ISBN-13: 9789251058763

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Describes the basic principles that can be used to reduce the impact of trawling, some of which are already developed as practical solutions and implemented in commercial fisheries. These basic mitigation measures aim at reducing pressure on the bottom of various trawl components and minimising the impacted area while trawling.

Scallops

Scallops PDF

Author: Sandra E. Shumway

Publisher: Elsevier

Published: 2016-06-07

Total Pages: 1214

ISBN-13: 0444627197

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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

Marine Navigation and Safety of Sea Transportation

Marine Navigation and Safety of Sea Transportation PDF

Author: Adam Weintrit

Publisher: CRC Press

Published: 2013-06-04

Total Pages: 320

ISBN-13: 1315883120

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The TransNav 2013 Symposium held at the Gdynia Maritime University, Poland in June 2013 has brought together a wide range of participants from all over the world. The program has offered a variety of contributions, allowing to look at many aspects of the navigational safety from various different points of view. Topics presente

Effects of Trawling and Dredging on Seafloor Habitat

Effects of Trawling and Dredging on Seafloor Habitat PDF

Author: National Research Council

Publisher: National Academies Press

Published: 2002-07-09

Total Pages: 136

ISBN-13: 0309169801

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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.