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papa Karlo Постоянный участник |
Зачем они это делают? What chemicals are used to treat farmed salmon? Throughout their life, from birth to slaughter, farmed salmon are treated with a range of chemicals to protect them from disease and to make them more attractive to consumers. The flesh of wild salmon is naturally pink, because of the food they eat in the wild. Factory-farmed salmon flesh, however, is muddy grey in colour. Most farm salmon are fed a manufactured colourant in their food to make their flesh colour more appealing to consumers. Common diseases on Scottish fish farms include Infectious Salmon Anaemia, Bacterial Kidney Disease and Infectious Pancreatic Necrosis, all of which can be fatal to caged salmon. Because of the numbers of fish stocked into each cage, disease spreads rapidly and is as quickly transferred to adjacent cages in the same sea loch. Factory-farmed salmon have been identified by scientists as containing potentially harmful levels of PCB’s and dioxins. A recent report advised people to limit the quantity of farmed salmon they ate to no more than four meals a year. Much of the contamination in farmed salmon comes from the concentrated food fed to these fish. This is sourced from small, base-of-the-food-chain species that have accumulated high levels of contaminants from where the live; sandeels, Norwegian pout and capelin, for instance, from the polluted waters of the North Sea. These PCB’s and dioxins are thus passed on to farm salmon. Wild salmon may also have levels of PCB’s and dioxins, but because of the wide range of their feeding grounds, these levels are lower than they are in farm salmon. Industrial fishing also has an adverse impact on other species. Cod, mackerel and herring predate on sandeels, as do wild salmon and sea-trout and a wide range of sea birds. In recent years cod stocks in particular are so depleted than scientists advise a complete ban of commercial fishing for that species. There have been wide-spread breeding failures of sea birds because there is nothing for parent birds to feed to their young. The small fish are mashed up to provide protein to be fed to farm animals and farm salmon. Research suggests that it takes three tonnes of these small fish to produce one tonne of farmed salmon. I believe, therefore, that it is a myth to claim that fish farming reduces the pressure of wild stocks. I think that exactly the opposite is the case. Fish farming is driving wild stocks to extinction. |
Guest IP-штамп: frwyg/56pJQ2E гость |
даже удивительно что такое вроде бы благое дело как аквакультура лосося и креветок оказывает такой разрушающий еффект на дикую природу. |