Abstract
Abstract In this study, groups of Japanese quails were fed diets containing copper, vitamin A and pyrrolizidine alkaloids (PA) from tansy ragwort (Senecio jacobaea, TR) collected in Oregon, USA, for 6 weeks. It was shown that consumption of 10% TR did not affect the growth rate; however, the feed efficiency for the TR-fed groups was slightly lower than for controls. Liver copper levels decreased with TR treatment but there were no significant differences in serum copper concentrations among treatment groups. The concentrations of zinc and iron in the serum and liver were also not affected by PA. Serum vitamin A levels were not affected by PA consumption . The concentration of liver vitamin A remained normal with the exception of the group fed TR without added copper or vitamin A. In this group, the liver vitamin A content was elevated. These results show that Japanese quails are resistant to PA.
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