Effect of mackerel oil on DHA content of a chicken egg
2007
Ichikawa, Y.(Fukui-ken. Animal Experiment Station, Mikuni (Japan)) | Tanabe, T. | Matsutani, T. | Mizuguchi, C.
The present study has shown what amount of mackerel oil should be added to hen feed in order to produce chicken eggs rich in DHA. In addition, there was examined if the addition of antioxidation (a tea leaf and vitamin E) to mackerel oil could be effective. With 1%, 3%, 5% or 7% added mackerel oil added to feed, DHA content in an egg yolk tended to increase as the addition rate rose, however, the shift rate fell contrary. The addition of 7% mackerel oil to feed increased DHA contents in egg yolk above 3 times compared to the control. Besides, arachidonic acid and linoleic acid decreased and the n-6/n-3 ratio fell, however, the productivity such as laying rate or daily output declined. Further, the effect of additional tea leaf (from 0.5% to 1.5%), or vitamin E (from 100IU to 300IU) was examined, and no correlation was found between the addition rate and DHA content.
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