ABSTRACT 



Rat feeding studies have indicated that pollock fish 

 scale protein is as well digested but about 30 percent less 

 assimilated than a protein supplement consisting of 3 parts 

 casein and 1 part lactalbumin. Fish scales as the only- 

 source of 9 percent protein in the diet are incapable of 

 supporting growth of young rats, but the scales can be utilized 

 as a limited source of protein when supplemented with casein- 

 lactalbumin protein. Increased utilization of scale protein 

 in combination with stepwise higher levels of casein-lactalbumin 

 indicate that no toxic substances per se are present in scales 

 for growing rats. 



