BUREAU OF FISHERIES XXI 



A study of the effects of pollution upon the fresh-water mussel and a 

 survey of the streams in the Middle West yield information of direct 

 vahie in stocking these waters with food and game fishes, and it is 

 intended to expand activities in this direction as rapidh^ as funds will 

 permit. 



STATISTICAL SURVEYS 



The statistical work of the di^-ision of fishery industries included 

 the collection and dissemination of biological and trade-fishery statis- 

 tics. Further progress was made toward the collection of annual 

 statistics of the entire country by greater cooperation ^^ith State 

 fishery agencies and by the use of automobiles by agents. As a result, 

 catch' statistics for 1928 were obtained for the fisheries of the New 

 England, South Atlantic, Gulf, Pacific Coast, and Great Lakes States. 



MANUFACTURED PRODUCTS 



Canned products. — During 1929, 497 estabUshments were engaged 

 in the canning of fishery products in the United States and Alaska. 

 The total production amounted to 689,446,781 pounds net weight, 

 valued at $101,065,055. This is an increase of 5 per cent in value 

 compared with the respective value of the production in 1928. Salmon 

 canned on the Pacific coast, mainlv in Alaska, accounted for 6,990,682 

 standard cases (335,552.736 pounds), valued at S56,085,697. This is 

 55 per cent of the total value of all products canned in 1929. Sardines 

 with a production of 5,857,016 standard cases (234,543,345 pounds), 

 valued at $18,894,943, accounted for 19 per cent of the total value. 

 Sardines were canned in CaHfornia, Maine, and Massachusetts. Tuna 

 and timalike fishes with a production of 1,504,306 standard cases 

 (36,103,344 pounds), valued at $9,873,453, accounted for 10 per cent 

 of the value. Tuna and tunalike fishes were canned only in Cahfornia. 

 The remainder of the ])roduction consisted princi])ally of shrimp, 

 oysters, clam products, and mackerel. 



By-products. — During 1929 by-products of the fisheries worth 

 $23,767,656 were manufactured. The most important were 15,353,057 

 gallons of marine-animal oils, ^^^th a value of $6,801,619; 142,681 tons 

 of marine-animal meals and scrap with a value of $6,801,362; fresh- 

 water mussel shell products, such as buttons and novelties, valued at 

 $6,144,515; and 334,766 tons of oyster-shell products, such as lime 

 and crushed shell for poultry, valued at $2,524,499. The remainder, 

 valued at $1,495,661, consisted of such commodities as herring skins 

 and scales, shark skins and fins, fish flour, agar agar, glue, and various 

 miscellaneous products. 



FROZEN FISH 



In 1929 there were 122 plants in the United States and Alaska 

 freezing fisher\' products and 168 cold-storage warehouses which 

 stored frozen-fishery ])roducts. The quantity of fish frozen amounted 

 to 121,542,589 pounds, with an estimated value in the cold-storage 

 warehouses of $15,000,000. The average monthly holdings amounted 

 to 55,900,000 i)ounds in 1929, or 17 i)er cent over the 5-year average 

 of monthly holdings. The freezing plants are capable of packing 

 about 3,617,000 pounds of frozen fish j)er working day, and the cold- 

 storage warehouses are capable of holding a maximum of 209,660,000 

 pounds of fishery products at one time. 



