Effects Of Fishing On Non Target Species And Habitats PDF Download
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| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 137 |
| Release | : 2002-08-09 |
| Genre | : Science |
| ISBN | : 0309083400 |
Download Effects of Trawling and Dredging on Seafloor Habitat Book in PDF, ePub and Kindle
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.
| Author | : Michael J. Kaiser |
| Publisher | : Wiley-Blackwell |
| Total Pages | : 420 |
| Release | : 2000-01-21 |
| Genre | : Technology & Engineering |
| ISBN | : 9780632053551 |
Download Effects of Fishing on Non-Target Species and Habitats Book in PDF, ePub and Kindle
Fishing is a major form of ecological disturbance to marine communities throughout the world. In the past, fisheries biologists have concentrated on the studying of the direct effects of fishing on stocks of target species and understanding the processes of recruitment. There is now a growing appreciation of the ecological implications of the wider effects of fishing activities on marine organisms and their habitats. Contributions include articles that consider the physical effects of fishing gears on the seabed; distribution of, and trends in fishing effort; ecological effects on benthic fauna; long-term community changes; the effects of food subsidies in the marine environment; interactions between fisheries and marine mammals; technical measures to reduce impacts of fisheries; conservation issues and priorities; socio-economic implications of wider fisheries impacts.
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 189 |
| Release | : 1999-03-19 |
| Genre | : Technology & Engineering |
| ISBN | : 0309055261 |
Download Sustaining Marine Fisheries Book in PDF, ePub and Kindle
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.
| Author | : K. P. Andersen |
| Publisher | : |
| Total Pages | : |
| Release | : 1977 |
| Genre | : |
| ISBN | : |
Download A Multispecies Extension to the Beverton and Holt Theory of Fishing, with Accounts of Phosphorus Circulation and Primary Production Book in PDF, ePub and Kindle
| Author | : Polunin Nicholas V.C. |
| Publisher | : Springer |
| Total Pages | : 477 |
| Release | : 2014-10-09 |
| Genre | : Science |
| ISBN | : 9789401587808 |
Download Reef Fisheries Book in PDF, ePub and Kindle
Reef ecosystems extend throughout the tropics. Exploited by small-scale fishers, reefs supply food for millions of people, but, worldwide, there are growing worries about the productivity and current state of these ecosystems. Reef fish stocks display many features of fisheries elsewhere. However, habitat spatial complexity, biological diversity within and among species, ecosystem intricacy and variable means of exploitation make it hard to predict sustainable modes and levels of fishing.
| Author | : Sergi Tudela |
| Publisher | : Food & Agriculture Org. |
| Total Pages | : 60 |
| Release | : 2004 |
| Genre | : Biodiversity |
| ISBN | : 9789251051924 |
Download Ecosystem Effects of Fishing in the Mediterranean Book in PDF, ePub and Kindle
Most of the major impacts of fishing on the ecosystems recorded around the world occur in the Mediterranean. This variety of interactions is due to four main interrelated factors: the wide range of fishing gear and practices; very intensive fishing; a high diversity of exploited habitats, ranging from shallow water to the deep-sea and oceanic domain; and high biological diversity.
| Author | : M.J. Kaiser |
| Publisher | : Wiley-Blackwell |
| Total Pages | : 288 |
| Release | : 2000-08-01 |
| Genre | : |
| ISBN | : 9780852382660 |
Download Effects of Fishing on Non-Target Species Book in PDF, ePub and Kindle
Fishing is a major form of ecological disturbance to marine communities throughout the world. In the past, fisheries biologists have concentrated on the studying of the direct effects of fishing on stocks of target species and understanding the processes of recruitment. There is now a growing appreciation of the ecological implications of the wider effects of fishing activities on marine organisms and their habitats. Contributions include: articles that consider the physical effects of fishing gears on the seabed; distribution of, and trends in fishing effort; ecological effects on benthic fauna; long-term community changes; the effects of food subsidies in the marine environment; interactions between fisheries and marine mammals; technical measures to reduce impacts of fisheries; conservation issues and priorities; and socio-economic implications of wider fisheries impacts.
| Author | : Simon P. Northridge |
| Publisher | : Food & Agriculture Org. |
| Total Pages | : 132 |
| Release | : 1991 |
| Genre | : Technology & Engineering |
| ISBN | : 9789251030981 |
Download Driftnet Fisheries and Their Impacts on Non-target Species Book in PDF, ePub and Kindle
Non-target catches are not known.
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 169 |
| Release | : 2006-07-26 |
| Genre | : Science |
| ISBN | : 030910050X |
Download Dynamic Changes in Marine Ecosystems Book in PDF, ePub and Kindle
Recent scientific literature has raised many concerns about whether fisheries have caused more extensive changes to marine populations and ecosystems than previously realized or predicted. In many cases, stocks have been exploited far beyond management targets, and new analyses indicate that fishing has harmed other species—including marine mammals, seabirds, sea turtles, and sea grasses—either directly through catch or habitat damage, or indirectly through changes in food-web interactions. At the request of the National Oceanic and Atmospheric Administration, the National Research Council conducted an independent study to weigh the collective evidence for fishery-induced changes to marine ecosystems and the implications of the findings for U.S. fisheries management. Dynamic Changes in Marine Ecosystems provides comprehensive information in regard to these findings.
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 289 |
| Release | : 2001-06-01 |
| Genre | : Science |
| ISBN | : 0309072867 |
Download Marine Protected Areas Book in PDF, ePub and Kindle
Although the ocean-and the resources within-seem limitless, there is clear evidence that human impacts such as overfishing, habitat destruction, and pollution disrupt marine ecosystems and threaten the long-term productivity of the seas. Declining yields in many fisheries and decay of treasured marine habitats, such as coral reefs, has heightened interest in establishing a comprehensive system of marine protected areas (MPAs)-areas designated for special protection to enhance the management of marine resources. Therefore, there is an urgent need to evaluate how MPAs can be employed in the United States and internationally as tools to support specific conservation needs of marine and coastal waters. Marine Protected Areas compares conventional management of marine resources with proposals to augment these management strategies with a system of protected areas. The volume argues that implementation of MPAs should be incremental and adaptive, through the design of areas not only to conserve resources, but also to help us learn how to manage marine species more effectively.
