You Are What Your Fish Eat!

When the diet of farm fish be altered, the sustenance we munch also change.

For his doctorate, Sverre Ludvig Seierstad investigate the birth effect of replace the fish oil usually previously own surrounded via fish nurture beside vegetable oils. What consequences could this enjoy by the side of both fish and human robustness? The research suspend over "Fjord til bord (Fjord to table)" have be a assistance linking the Norwegian School of Veterinary Science, the National institute in support of Nutrition and Seafood Research (NIFES), Nutreco ARC and Ulleval University Hospital.

The foremost ingredient of fish feed have traditionally been of submarine beginning. For several reason, plus increased insert for for and gather of farmed fish, and climatic consideration, feed ingredients of marine origin are becoming both scarce and pricey. The fish gardening industry for this reason wishes to utilise alternative lipid (fat) well in feed used for salmon farming.

Vegetable oils have been shown to stir aloft the appetite and feed intake of fish, and to yeast disease rate and carcase ability. This doctorate investigated quite a few consequences of the expenditure of these alternative fish oils in the feed on the health of both fish and man. Marine oils are loaded in long-chain omega-3 fatty acids (EPA and DHA), which have been shown to have profitable effects on heart and circulatory prearranged of contacts spinelessness in man. Seierstad's research focussed on the ways of familiar sight substances for heart and vein parameter, and for inflammation, in both salmon and human.

The feed suit with farmed salmon be carried out at Gildeskal and in Stavanger. Wild salmon, caught in Namsen (Lilleøen, Namsos), were used in place of a insinuation contingent.

During his analysis, Sverre Seierstad investigated the arousing of thickenings in the wall of the cardiac artery of Atlantic salmon at contrasting arm of the fish's go cycle and show that the opus of portly in the feed have no effect on the development of constriction in the cardiac arteries of farmed salmon.

In collaboration with Ulleval Hospital, heart patients with atherosclerosis (disease of the cardiac arteries) were placed on three different diets, using salmon meat contain varying amounts of fish grease and vegetable oil. It be shown that the fat composition of the salmon meat pretentious the fatty tart profile of the patients' blood and that the advantageous marine omega-3 fatty acids increased markedly in those patients that devour fish feed on feed containing sterilized fish oils. It was also shown that in these patients the level of marker substances for heart and vessel disease were by a long channel superior than in patients intake fish fed pure rapeseed oil.

Sverre Ludvig Seierstad defended his Dr. Med. Vet. tract with the headline "The effect on fish and human health of replace marine oils by vegetable oils in feed of Atlantic salmon", at the Norwegian School of Veterinary Science on February 15, 2008.

NORWEGIAN SCHOOL OF VETERINARY SCIENCE Ullevalsveien 72

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