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Salmon Farming (salmon + farming)
Selected AbstractsSalmon farming: towards an integrated pest management strategy for sea licePEST MANAGEMENT SCIENCE (FORMERLY: PESTICIDE SCIENCE), Issue 6 2002J Mordue (Luntz) No abstract is available for this article. [source] Salmon farming: towards an Integrated Pest Management strategy for sea lice.PEST MANAGEMENT SCIENCE (FORMERLY: PESTICIDE SCIENCE), Issue 6 200219 June 2001., SCI Meeting at Department of Zoology, Scotland, University of Aberdeen First page of article [source] Public attitudes towards the environmental impact of salmon aquaculture in ScotlandENVIRONMENTAL POLICY AND GOVERNANCE, Issue 2 2006David Whitmarsh Abstract This paper reports the results of a survey of public attitudes towards aquaculture, using salmon farming in Scotland as a case study. The aims have been to identify the priority that people attach to the environmental performance of the salmon aquaculture industry, relative to other objectives, and to measure the economic benefits to society from salmon farmed using methods that cause less organic pollution. The results indicate that the public attach a relatively high importance to minimizing environmental damage from aquaculture, and this has its parallel in the finding that people are willing to pay a price premium for salmon produced in a more environmentally benign way. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment. [source] Shellfish aquaculture and First Nations' sovereignty: The quest for sustainable development in contested sea spaceNATURAL RESOURCES FORUM, Issue 2 2010Alyssa L. Joyce Abstract Aquaculture tenures or leases have become an increasingly important management tool for regulating access rights to coastal and offshore marine habitat. Tenure, as a form of private property rights to marine space, is generally considered a prerequisite for aquaculture development, as are the associated exclusive access rights which provide necessary incentives for producers to invest in infrastructure. The shellfish industry in British Columbia (BC), Canada, is presented as a case study of a transition from a primarily common property wild fishery to a rights-based system for aquaculture. In BC, seafood production has grown substantially during the past two decades as a result of aquaculture production. However, despite the inherent economic advantages of the tenuring system for increasing seafood production, rights to aquaculture sites in BC remain highly controversial, particularly in response to environmental concerns and infringements on Aboriginal territorial claims. Shellfish farming has, to-date, been far less controversial than salmon farming; however, shellfish aquaculture has not been uniformly adopted across the province, and analyses of industry capacity or economic opportunities for coastal communities have failed to adequately explain development patterns. This paper, which identifies perceptions of the risks and benefits of the shellfish aquaculture tenuring system, presents the results of 56 interviews conducted with individuals involved in shellfish production in BC. Results indicate that heightened perceptions of risk about shellfish aquaculture tenuring are related to unresolved Aboriginal territorial claims, economic dependence on wild shellfish resources, as well as place-based values favouring access to wild resources. Underlying values and cultural understandings also strongly shape public perceptions of the risks of aquaculture, and as such, influence local decisions to either accept or resist industry growth. In this case, interviewees' risk perceptions were found to be more important indicators of the potential for industry expansion than studies of capacity or economic cost-benefit analyses. [source] Demonstration of salmon farming as a net producer of fish protein and oilAQUACULTURE NUTRITION, Issue 4 2010V.O. CRAMPTON Abstract To date aquaculture's reliance on dietary marine sources has been calculated on a fish weight-to-weight basis without considering the absolute amounts of nutrients but this approach neglects the often considerable differences in the nutritional value of fish. We propose simple nutrient-to-nutrient-based dependency measures that take into account these nutritional differences. In the first study reported here, individually tagged Atlantic salmon (Salmo salar) were reared in seawater supplied tanks with feed collection facilities. In the second, commercial net pens were used to grow over 200 000 fish. For both studies, a low marine ingredient feed containing approximately 165 g kg,1 fishmeal was compared to a control feed (approx 300 g kg,1 fishmeal) whilst fish oil inclusion was less markedly reduced. The low marine feeds supported similar growth and feed efficiency compared to the control feeds. With the low marine ingredient feeds, the weight of salmon protein and lipid produced through growth exceeded the weight of marine protein and lipid consumed by the fish meaning that salmon farming can be a net producer of fish protein and oil. The amount of n-3 long-chain polyunsaturated fatty acids deposited was sufficient to meet current recommendations from human health organizations. [source] Salmon lice infection of wild sea trout and Arctic char in marine and freshwaters: the effects of salmon farmsAQUACULTURE RESEARCH, Issue 12 2001P A Bjørn Abstract The abundance of salmon lice and the physiological effects of infection were examined in two stocks of sympatric sea trout and anadromous Arctic char in northern Norway. One stock feed in a coastal area with extensive salmon farming (exposed locality), while the other feed in a region with little farming activity (unexposed locality). The results showed that the lice infection was significantly higher at the exposed locality, at which the mean intensity of infection peaked in June and July at over 100 and 200 lice larvae per fish respectively. At the exposed locality we also observed a premature return to freshwater of the most heavily infected fish. Such behaviour has previously been interpreted as a response by the fish to reduce the stress caused by the infection and/or to enhance survival. Blood samples taken from sea trout at sea at the exposed locality showed a positive correlation between intensity of parasite infection and an increase in the plasma cortisol, chloride and blood glucose concentrations, while the correlations from sea trout in freshwater were more casual. Several indices pointed towards an excessive mortality of the heaviest infected fish, and 47% of the fish caught in freshwater and 32% of those captured at sea carried lice at intensities above the level that has been shown to induce mortality in laboratory experiments. Furthermore, almost half of all fish from the exposed locality had lice intensities that would probably cause osmoregulatory imbalance. High salmon lice infections may therefore have profound negative effects upon wild populations of sea trout. At the unexposed location, the infection intensities were low, and few fish carried more than 10 lice. These are probably within the normal range of natural infection and such intensities are not expected to affect the stock negatively. [source] | ||||||||||