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Effect of dietary fermented fish waste on the digestion of feed and supply of unsaturated fatty acids including conjugated linoleic acid in cattles

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This study was conducted to evaluate the effect of fermented fish waste (FW) on the digestion of fiber and the flow of unsaturated fatty acids (UFA) to the duodenum and plasma in cattle. Four Holstein cows were used in a 4×4 Latin square design and cows were provided with one of four treatments consisting 0, 5.5, 11, and 16.5% of FW. The digestion of dry matter decreased as the FW increased; however, the lipid concentration increased linearly (P<0.05) as the FW increased. According to the duodenal composition, the lipid concentration and UFA such as conjugated linoleic acid (CLA), arachidonic acid, and docosahexaenoic acid (DHA) increased linearly (P<0.05) as the amount of FW increased in the diet. Additionally, the concentration of CLA, eicosapentaenoic acid and DHA increased linearly (P<0.05) in the plasma as the FW increased. Thus, these findings indicate that FW can be useful as UFA supplementation of feedstuff.

Keywords: Fat supplements; conjugated linoleic acid; fish waste; unsaturated fatty acids

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/09064700902780633

Affiliations: 1: College of Animal Life Sciences, Kangwon National University, Kangwon, Korea 2: Department of Agricultural and Life Sciences, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan

Publication date: March 1, 2009

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