Omega-3 polyunsaturated fatty acids in relation to fish feeding habit

A correlation was found between the fatty acids composition of feed and lipid metabolism of the fish. The proportion of total n-6 PUFA was higher, while the total n-3 PUFA and the n-3/ n-6 were significantly lower in omnivorous fish as compared with carnivorous and herbivorous fish. The percentages of n-3 PUFA and especially 22:6 n-3 and 20:5 n-3 were higher in the herbivorous fish, while carnivorous fish exhibited the highest level of saturated fatty acids