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The Biological Value of Rations Containing Fish Meal¹

One Figure

Divisions of Chemistry and Poultry, Agricultural Experiment Station, Pullman, Washington

The results of a study of the supplementary value of herring fish meal fed at different levels in an all-mash ration for growing chicks are given. The biological value of these rations is high. It decreases somewhat as the level of total protein increases. The chicks receiving the ration containing 15 per cent total protein showed a slightly more efficient use of protein based on the gain per gram of protein consumed. Increased percentage of protein was accompanied by increased rate of growth.

Based on growth, feed utilization, protein utilization, and biological value, the 15 per cent protein level in this all-mash ration appears to be more efficient under the conditions used than the other protein levels used.

Manuscript received 4 April 1933.