20 U. S. BUREAU OF FISHERIES. 



Domestic exports of canned fish from the United States, by countries, 192^2 — Continued . 



BY-PRODUCTS OF THE FISHERIES. 



The utilization of waste products of the fisheries to produce valu- 

 able by-products continues to hold the attention of the fish trade. 

 In this direction lies a possibility of reducing the excess overhead 

 expense in the fish industry. The principal by-products are fish 

 oils and fish meal and scrap. The total value of all by-products of the 

 fisheries in 1922 was Sll.390,693, an increase of 36. 4 per cent over 

 the value of the production in 1921, which was $8,351,827. 



PISH OILS. 



The fish -oil production in the United States and Alaska in 1922 

 amounted to 8,288,328 gallons, valued at $3,346,046. This does 

 not include the production of whale oil, which in 1922 was 1,863,015 

 gallons, valued at $731,000, nor sperm oil, whi'ch was 384,130 gallons, 

 valued at $153,714. The largest item of fish oil is menhaden oil, 

 of which 7,102,677 gallons were produced, valued at $2,904,833. 

 In 1921 the total production of fish oil was 7,446,281 gallons, valued at 

 $2,078,670. There was thus in 1922 an increase of 11.3 per cent in 

 the total quantity of fish oils (exclusive of whale and sperm) and 61 

 per cent in the value. The oils produced in 1922 include besides 

 menhaden, whale, and sperm oils, salmon, 25,989 gallons; sardine. 

 428,859 gallons; tuna, 86,099 gallons; herring, 450,362 gallons; 

 liver, 67,459 gallons; cod liver, 4,080 gallons; miscellaneous fish oils, 

 122,803 gallons. 



FISH SCRAP AND MEAL. 



The total value of all fish scrap and meal, green and dry, includ- 

 ing that prepared from shrimp and menhaden, was, in 1922, 116,166 

 tons, valued at $4,336,677, an increase of 8.29 per cent in quantity 

 and 21.9 per cent in value over the production in 1921, which was 

 107,273 tons, valued at $3,557,142. Of the total amount 93,576 

 tons, or 80.5 per cent, was produced by menhaden, and 22,590 tons, 

 or 19.5 per cent, by all other fish, the latter amount, valued at 

 81,114,919. representing a decrease of 8.2 per cent in quantity and 



