236 



U. S. BUREAU OF FISHERIES 

 Domestic exports of canned fish, 1922 to 1924 



Year 



Salmon 



Pounds 



1922 ...| 63,797,279 



1923.. I 59,594,422 



1924 67,013,369 



Value 

 $7, 962, 375 

 9, 154, 711 

 9, 667, 126 



Sardines 



Pounds 

 20, 059, 845 

 33, 660, 937 

 51, 260, 836 



Value 

 $1, 780, 956 

 2, 919, 767 

 4, 278, 547 



Tuna 



Pounds 

 0) 



76, 342 

 138, 787 



Value 

 0) 



$23, 992 

 42, 927 



' Not shown separately in 1922. 



BY-PRODUCTS OF THE FISHERIES 



• The by-products of the fisheries include a variety of materials, 

 such as fish oils, fish scrap and meal, shrimp bran, crushed oyster 

 shells for poultry grit, lime from oyster shells, liquid glue, scales 

 from which pearl essence is extracted, and others. Their production 

 is important in providing a more complete utilization of marine 

 products, or, stated differently, the production of a greater number 

 and volume of products without taking more fish or shellfish from the 

 sea. 



If we include the production of materials in the menhaden and 

 whale industries, the total value of by-products in 1924 amounted 

 to S10,308,990, as compared to $12,634,590 in 1923. The decrease 

 is due to a failure of the menhaden industry. Other by-products* 

 have increased, compared with former years, as may be seen in the 

 following table, which summarizes the statistics on by-products for 

 the years 1921 to 1924. 



Comparative statistics of fishery hy -products from 1921 to 1924 



