Relation Between the Available Essential Amino Acid Patterns in Four Fish Meals and Their Values in Certain Broiler Rations

EXPERIMENTS are being conducted at our station to determine by a chick test which amino acids are most limiting in the protein of feedstuffs commonly used in poultry rations. A previous report (Warnick and Anderson, 1968) gave results obtained in studies on soybean meals and cited our other related publications. The present paper reports results obtained in similar studies of fish meals. In addition to the tests to determine the limiting amino acids, each meal was fed as a supplement to a corn and soybean meal ration and as a supplement to a corn and cottonseed meal ration. Four lots of fish meal were used to supplement a ration based on corn, cottonseed meal, and soybean meal. This allowed us to compare the meals in the different tests. In the United States fish meal is used in most rations fed to broiler chicks and to turkey poults, and it is . . .