FISHERY INDUSTRIES OF THE UNITED STATES, 1930 133 



rate. The catches of lake herring, lake trout, and yellow perch, as 

 well as some of the less important species, have shown recoveries 

 from the small catches of 1928. 



MISSISSIPPI RIVER AND TRIBUTARIES 



No general survey of the fisheries of this 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 Lakes Pepin and Keokuk decreased in yield in 1930 

 as compared with the previous year, but the catch in the Mississippi 

 River between these two lakes shows a gain. 



ALASKA 



The catch of the fisheries of Alaska in 1930 was somewhat less 

 than in the previous year. 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 previous year. There was an increase in tlie frozen fish and cured 

 fish activities over 1929. 



Fisheries of the United States and Alaska, 1929 ' 



SUMMARY OP CATCH: By sections 



[Expressed in thousands of pounds and thousands of dollars; that is, 000 o^tted] 



' All figures are for 1929, except those for the Mississippi River and tributaries. In this section the figures 

 on the catch of mussels are for 1929 and other figures are for 1922. 



