Seasonal variations in cod liver oil

摘要

AbstractThe iodine value of cod liver oil varies regularly in an annual cycle over a range of 20–30 units. Maximum values occur in winter, an abrupt fall takes place in March, when the cod spawns, and the unsaturation slowly increases again during the summer period of intensive feeding.These changes in iodine value correspond to complementary changes in the total polyunsaturated fatty acids and the total monoenoic acids, the saturated fatty acids of the oil remaining virtually constant throughout the cycl