ACID ON REPRODUCTION OF WHITE LEGHORN MALES Abstract approved Redacted for Privacy

Two lots of six White Leghorn male chickens were fed diets con-taining 7. 3 % linoleic acid and either. 075 % ethoxyquin (lot 1) or 32. 4 mg/kg of added vitamin E (lot II) for 47 weeks both of which were designated as positive controls. A third group (lot III) containing 30 males received the same level of linoleic acid but had no added vitamin E or ethoxyquin until the 38th week when the lotwas divided into five sub-lots, equalized for fertility, based on the results of the 34th week. At this time the subdivided lots were supplemented with. 075 or. 3 % ethoxyquin (lots IV and V) and 32. 4 or 162. 0 mg/kg of vitamin E (lots VI and VII) while one group was retained as the nega-tive control (lot III). During the depletion period fertility in lot III, the negative con-trol group, decreased to 29. 2 % at 38 weeks. Fertility in the lots sup-plemented throughout the trial with. 075 % ethoxyquin (lot I) and 32. 4 mg/kg of vitamin E (lot II) was significantly greater than lot III beginning at 25 and 30 weeks, respectively, and throughout the re