FISHERY INDUSTRIES OF THE UNITED STATES, 1931 117 



in some of the States. The catch of cisco, although much greater 

 than in 1929, is still far below the volume once attained as an impor- 

 tant product of the fisheries of Lake Erie. The production of cured 

 fishery products increased as compared with 1929. 



MISSISSIPPI RIVER AND TRIBUTARIES 



No general survey of the fisheries of Mississippi region has been 

 made since 1922, and therefore no recent trend can be determined. 

 The yield of fresh-water mussels, which contributed approximately 

 one-half to the total weight of the catch in 1922, shows an increase 

 in 1930, not only over the production of 1922, but also that of 1929. 

 The fisheries of Lake Pepin and Keokuk decreased in volume and 

 value as compared with the previous year, but the catch and its 

 value in the Mississippi River between these two lakes increased in 

 1930. 



ALASKA 



The catch of fishery products of Alaska in 1930 was somewhat less 

 than during the previous year, and the value of the catch was con- 

 siderably less. There was a decrease in the pack of salmon amounting 

 to 6 per cent as compared with the pack in 1929. The catch of 

 herring as well as that of halibut was somewhat less than in the pre- 

 vious year. There was an increase in the frozen fish and cured fish 

 production over 1929. 



Fisheries of the United States and Alaska, 19S0 i 



SUMMARY OF CATCH: By sections 



[Expressed in thousands of pounds and thousands of dollars; that is, 000 omitted] 



1 All figures are for 1930, except those for the Mississippi River and tributaries. In this section the figures 

 on the catch of mussels are for 1930 and other figures are for 1922. 



