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Impact of the Introduction of the Commercial Purse-Seine Operations on the Traditional Fisheries of the Karnataka Coast in India





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    A critique of the ecosystem impacts of drifting and anchored FADs use by purse-seine tuna fisheries in the Westernand Central Pacific Ocean 2013
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    In the Western and Central Pacific Ocean (WCPO), which accounts for over half of world tu production, purse seine effort and catch on floating objects have increased significantly due to a rapid increase in the use of fixed and free-floating fish aggregation devices (FADs). FAD fishing has had an impact on the current status of the stocks of the three main target tus in the equatorial WCPO, skipjack (Katsuwonus pelamis), yellowfin (Thunnus albacares) and bigeye (T. obesus). FADs have been shown to influence the behaviour and movement patterns of the three tu species with the juveniles of each species occupying shallower habitats when associated with FADs. Aggregation of tus around drifting objects increases their vulnerability to purse seine gear, particularly for juvenile and small size classes. Further to the impacts on the target stocks, the use of FADs has increased the vulnerability of other fishes to the purse seine method, including some shark and billfish species. Given the con cern over FAD-related fishing effort on target and bycatch species, there is a need to understand how FAD use affects target and bycatch stocks. Science needs to better support magement decisions are highlighted including the need to identify the magnitude of broader community-level affects.
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    An incomes and costs study of the Egyptian purse seine fishery operated in the Gulf of Suez and off the southern Red Sea coast during 1980-81 1982
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    This report describes the incomes and costs of the Egyptian purse seine fleet operated in the Gulf of Suez and off the southern Red Sea coast during 1980-81. The principal data sources were the official statistics of daily landings, interviews with marketing agents in respect to obtaining prices, and interviews with boat owners and/or skippers for obtaining the costs. Some aspects of the current management regime were discussed. The practice of requiring some 10% of the landings at the principal landing site to be marketed at Suez, rather than in Cairo where higher prices are obtained, was shown to represent a subsidy to the population in Suez of about 3% of the gross income. A comparison of the economic performances of the boats operated in the Gulf which were managed under a regime of license limitation with the performance of the boats operated in the unlimited 'outside' the Gulf part of the fishery, indicated that the latter boats were performing marginally better. Another aspect o f management discussed was the labour cost savings that could result from the introduction of power block for hauling the nets.
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