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Impact of trawling and scallop dredging on benthic habitats and communities










Løkkeborg, S. Impacts of trawling and scallop dredging on benthic habitats and communities. FAO Fisheries Technical Paper. No. 472. Rome, FAO. 2005. 58p.


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    Tropical shrimp fisheries and their impact on living resources 2001
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    As part of the development of the project “Reducing the impact of tropical shrimp trawling fisheries on living marine resources through the adoption of environmentally friendly techniques and practices”, mainly funded by the Global Environment Facility (GEF), thirteen countries in tropical regions carried out a detailed review of their shrimp fisheries and studies on the environmental impact of these activities. The findings were summarized in national reports. The national reports include : general description of the shrimp fishery (resources, fishing methods and vessel, fishing practice, effort data, shrimp catches and by-catches (including species and size composition and its utilization); regulations and management measures; research activities; impact of present exploitation and fishing practices on the shrimp and fish resources and on the bottom habitat; perception of the present situation by industry, the authorities and environmental organizations; social implications of a djusting fishing to more environmentally friendly practices; priority issues requiring actions to meet acceptable standards of environmentally friendly shrimp exploitation and, finally, a proposal for a relevant National Plan of Action.
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    Report of the Regional Technical Workshop on Sustainable Marine Cage Aquaculture Development. Muscat, Sultanate of Oman, 25–26 January 2009 2009
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    The Regional Commission for Fisheries (RECOFI) Regional Technical Workshop on Sustainable Marine Cage Aquaculture Development, held from 25 to 26 January 2009 in Muscat, Sultanate of Oman, was organized in view of the growing importance and interest of this aquaculture sub-sector across the region. The workshop focus was on environmental impact assessment and monitoring, and aquaculture licensing for marine aquaculture cage systems and aimed at identifying constraints and shortcomings that requi red to be dealt with to support the development of the cage industry and facilitate investments from the private sector. The document contains a set of suggestions and recommendations with regards to technical and policy requirements needed to support the growth of the aquaculture sector as a whole and more specifically cage fish farming. The report also contains three review documents on marine cage aquaculture in the region, regulation of Norwegian net-cage fish farming, and a review on cage a quaculture licensing procedures prepared as background discussion papers for the workshop. With specific regard to environmental impact assessment (EIA) the discussions held at the workshop clearly indicate that there is a need for the region and individual Commission members to develop an ad hoc EIA format based on the conditions of the local marine environment. A proposed cage aquaculture licence procedure was discussed and proposed at the workshop based on the format developed and adopted by the Sultanate of Oman.
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    Report of the four GEF/UNEP/FAO Regional Workshops on Reducing the Impact of Tropical Shrimp Trawl Fisheries. Lagos, Nigeria, 15-17 December 1999. Puntareñas, Costa Rica, 15-17 January 2000. Teheran, Iran, 28 February - 1 March 2000. Denpasar, Bali, Indon 2000
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    As part of the development of the project “Reducing the impact of tropical shrimp trawling fisheries on living marine resources through the adoption of environmentally friendly techniques and practices”, mainly funded by the Global Environment Facility (GEF), four regional workshops were conducted during the period between December 1999 and March 2000 in Nigeria, Costa Rica, Iran and Indonesia. The main objectives of the workshops were to review the situation with regard to impact on the envir onment of shrimp trawling in each of the four regions and in the 13 participating countries in particular, and to discuss and agree on regional priorities and content of a possible main phase project. Reports from baseline studies in each of the 13 countries were presented. The most serious problems identified were capture and discard of juvenile food fish and high discard levels of most non-shrimp catch. It was also reported that more and more countries are introducing regulations to reduce d iscarding of bycatch. In some countries collecting, landing, processing and selling bycatch has become a new and viable occupation for coastal communities. Reduced shrimp catches and different levels of management action, like seasonal closure and mesh size regulations were reported by some countries. Conflicts about the use of fishing grounds and resources between industrial and artisanal fishers was reported to be widespread. The impact of trawling on the bottom habitat is an area where little knowledge exists among the participating countries. It was, however, realized that such impact might be important for some areas and the need for research within this field was stressed. Some countries have in their regulations the mandatory use of the Turtle Excluder Device, but many of these reported low compliance with such regulations.

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