116 FISHERIES OF THE NORTH SEA 



in a proper diet. A good fish-meal should 

 contain 55 per cent of albuminoids, and 

 its food unit value should be at least 150. 

 Sixty Ibs. of fish-meal are equivalent in 

 feeding value to 100 Ibs. of barley. It is 

 one of the richest cattle foods known, 

 hence it should be used sparingly, and with 

 cereals mainly composed of carbo-hydrates. 

 If it is given in too great a proportion with 

 other foods, it is not to be wondered at 

 that results should turn out unsatisfactory. 

 But if the requisite care is taken, the 

 use of fish-meal is well worth the extra 

 trouble. 



Fish-meal is not made usually from the 

 offals or entrails of fish ; this portion of the 

 anatomy is thrown overboard by the fisher- 

 man when he empties the trawl. When 

 the vessels are unloaded in port, the fish 

 are packed in boxes for rail or sent to 

 curing houses to be smoked or salted. 

 In all these operations parts of the fish, 

 such as the head and other less useful 

 portions, which have a smaller commercial 

 value, are cut away, and form the raw 

 material for concentration. In process of 

 making fish fillets more than half the fish 



