Effects of Fishing on Marine Ecosystems and Communities - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Effects of Fishing on Marine Ecosystems and Communities write by Stephen Hall. This book was released on 1999-03-19. Effects of Fishing on Marine Ecosystems and Communities available in PDF, EPUB and Kindle. Over-exploitation of the world's fish resources receives considerable attention and is a source of justifiable concern. However, fishing does much more than simply remove the species of interest. What are the other problems that fishing might cause? Are there knock-on effects caused by removal of the target species for other parts of the system? What incidental damage does fishing cause and how much do we really know and understand about the consequences of our actions? The Effects of Fishing on Marine Ecosystems and Communitites draws together, within one volume, an expert and comprehensive assessment of the problem.
Ecosystem Effects of Fishing in the Mediterranean
Ecosystem Effects of Fishing in the Mediterranean - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Ecosystem Effects of Fishing in the Mediterranean write by Sergi Tudela. This book was released on 2004. Ecosystem Effects of Fishing in the Mediterranean available 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.
Effects of Trawling and Dredging on Seafloor Habitat
Effects of Trawling and Dredging on Seafloor Habitat - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Effects of Trawling and Dredging on Seafloor Habitat write by National Research Council. This book was released on 2002-08-09. Effects of Trawling and Dredging on Seafloor Habitat available 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.
Ecosystems of the Deep Oceans
Ecosystems of the Deep Oceans - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Ecosystems of the Deep Oceans write by P.A. Tyler. This book was released on 2003-03-27. Ecosystems of the Deep Oceans available in PDF, EPUB and Kindle. This volume examines the deep sea ecosystem from a variety of perspectives. The initial chapters examine the deep-sea floor, the deep pelagic environment and the more specialised chemosynthetic environments of hydrothermal vents and cold seeps. These environments are examined from the perspective of the relationship of deep-sea animals to their physico-chemical environment.Later chapters examine the biogeography of the main deep oceans (Atlantic, Pacific and Indian) with particular attention to the downward flux of surface-derived organic matter and how this drives the processes within the deep-sea ecosystem. The peripheral deep seas including the polar seas and the marginal deep seas (inter alia the Mediterranean, Red, Caribbean and Okhotsk seas) are explored in the same context. The final chapters examine the processes occurring in the deep sea and include an analysis of why the deep sea has high species diversity, how the fauna respond to organic input and how species have adapted reproductive activity in the deep sea. The volume concludes with an analysis of the anthropogenic impact on the deep sea.
Reef Fisheries
Reef Fisheries - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Reef Fisheries write by Polunin Nicholas V.C.. This book was released on 2014-10-09. Reef Fisheries available 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.
