BY-PRODUCTS OF FISHERY INDUSTRIES 223 



meal is to be produced. Inasmuch as these are some- 

 what more costly than direct-heat driers, manufac- 

 turers have been slow to install them. 



In California, Oregon, Washington, and Alaska, 

 much fish meal is manufactured. In California much 

 meal is prepared especially for chicken feed by the 

 extraction process. Much meal is also prepared in 

 special continuous units designed to handle rela- 

 tively small amounts of fish and fish waste with a 

 minimum of labor. Although heated air is used to 

 dry the waste in most of these outfits, the products 

 of combustion are not permitted to pass over the 

 fish. These continuous fish-meal reduction units are 

 also in general use in Oregon, Washington, and 

 Alaska. 



Fat- free fish meal makes an excellent feed for hogs, 

 sheep, cattle, and chickens. Meal containing fresh 

 fat (not rancid) is a still better feed for hogs, sheep, 

 and cattle. Considerable care must be used, however, 

 in storing fatty fish meal, as the presence of rancid 

 fat in animal feeds gives the fat of the animal a 

 slightly fishy taste. 



Fish meal is an excellent source of protein for 

 poultry and for growing live stock, since not only is 

 the protein in a readily digestible form but this feed 

 contains a high percentage of calcium phosphate, 

 which is needed for the formation of eggs and bones. 



Fish Glue 



Fish glue is another fishery by-product which has 

 an evil reputation because of the foul odor commonly 

 associated with it. It need not have an especially bad 



