FISH MEAL IN AxNTIMAL FEEDING 



373 



grown up in the trade regarding the term " oily " as applied to fisli 

 meals. "" Oily " fish meals have been considered inferior products, 

 but this prejudice is unfounded and misunderstanding exists as to 

 the true value of good oily fish meals. An oily fish meal properly 

 prepared is a product of unexcelled feeding value among sources 

 of animal proteins. 



Oily fish meals are relatively high in oil or fat and .somewhat 

 lower in protein content than nonoily fish meals. Nonoily fish meals 

 are very low in content of oil or fat and as a rule relatively high in 

 protein content. There is some evidence resulting from recent scien- 

 tific research to indicate that nonoily fish meals may be best suited 

 to some farm animals and that other farm animals may give more 

 economical returns on oily fish meals. 



Some of the important fish meals and shellfish meals from the 

 standpoint of commercial production and potential availability in 

 quantities, together with 1929 statistics, are given in the following 

 table : 



Production of scrap, meals, etc., in United, States and Alaska, 1929 



It should be noted that a few of the items appearing in the above 

 table such as crude, green, and acidulated scrap, are not suitable for 

 animal feeding as now prepared. A different process or further steps 

 would have to be undertaken to render them useful for such purposes. 

 However, they do represent potential sources of feed concentrates. 

 Acidulated scrap is diverted into fertilizer stock. 



ACKNOWLEDGMENTS 



The author wishes to acknowledge his indebtedness to the useful- 

 ness of the excellent scientific abstracts contained in the " Experiment 

 Station Record," published by the office of experiment stations of the 

 United States Department of Agriculture, Washington, D. C, and 

 the " International Review of Poultry Science," Rotterdam, Holland. 

 These abstracts are so comprehensive, and at the same time concise, 

 that their equal could not be duplicated, and in some instances all 

 or parts of some of them were used in this publication. 



GENERAL FEEDING VALUE 



Under the general feeding value of fish meals and shellfish meals, 

 the following subjects are discussed : Superiority of fish meals over 

 other feed concentrates; growth-promoting properties of fish and 



