BUREAU OF FISHEEIES XVII 



water mussel-shell products, marine-pearl shell products, marine- 

 animal oils, and oyster-shell products. Products of lesser impor- 

 tance were liquid glue, herring skins and scales, shark skins, fins, 

 and meat, agar agar, pickled whale meat, whalebone, and isinglass. 



Cured lyrodibcis. — The production of cured fishery products in 

 the marine and lake sections of the United States and Alaska in 

 the calendar year 1929 amounted to 116,267,121 pounds, valued at 

 $17,822,253. Of this amount 72,842,774 pounds, valued at $7,038,425, 

 were salted; 36,490,815 pounds, valued at $9,446,612, were smoked; 

 4,746,634 pounds, valued at $1,214,205, were dried; and 2,186,898 

 pounds, valued at $183,011, were spiced. Mild-cured salmon was 

 the most valuable salted product, salmon the most valuable smoked 

 product, shrimp the most valuable dried product, and alewives the 

 most important spiced product. 



Packaged fresh, frozen, and smoked products. — During the calen- 

 dar year 1930 packaged fresh, frozen, and smoked products were 

 produced in 128 plants operated in 15 States. The output amounted 

 to 80,013,572 pounds, valued at $12,579,664 — a decrease of 5 per cent 

 in quantity and 15 per cent in value as compared with 1929. 



Frozen \iroducts. — In the calendar year 1930 the freezing plants 

 in the United States and Alaska packed 139,297,228 pounds of fro- 

 zen fishery products, with an estimated value in the cold-storage 

 warehouses of $16,500,000. This is the largest frozen pack on rec- 

 ord and is an increase of 15 per cent over 1929. The most impor- 

 tant frozen products were the group consisting of cod, haddock, had- 

 dock fillets, hake, and pollock; salmon; halibut; mackerel; whiting; 

 and sea herring. 



FISH-FARMING INDUSTRIES IN THE UNITED STATES 



As a continuation of the work started in the calendar year 1928 

 when the goldfish industry was surveyed, the fish-farming industry 

 was further studied in 1930 to include the trout and pondfish indus- 

 tries. It was found that there were 133 trout and 11 pondfish 

 establishments commercially active in 1929. The products marketed 

 in the trout industry were valued at $1,072,700, and in the pondfish 

 industry they were valued at $21,444. 



FOREIGN FISHERY TRADE 



The value of the United States foreign trade in fishery products 

 during the calendar year 1930 amounted to $68,105,230, of which 

 $50,829,653 represents the value of the imports for consumption and 

 $17,275,577 the value of exports. Compared with the previous year, 

 this is a decrease of 25 per cent in total trade. 24 per cent in the value 

 of imports, and 28 per cent in the value of exports. 



TECHNOLOGICAL INVESTIGATIONS 



The technologists of the division of fishery industries have been 

 conducting research mainly on problems relating to improvements 

 in methods of handling fresh fish, by-products and production 

 methods, net preservation, and the nutritive value of marine 

 products. 



