FISHERY INDUSTRIES OF THE UNITED STATES, 1926 409 
Ontario for 1925. The increased catch in the Canadian waters of 
this lake is responsible for this condition, inasmuch as the catch in 
the United States has not been decidedly upward. 
Yield by species —The yields of individual species have registered 
varying trends. The most remarkable of these is shown in the 
record for cisco of Lake Erie. Beginning with a catch in the United 
States and Canada of 24,121,000 pounds in 1913, it increased to 
48,823,000 in 1918, remained between about 20,000,000 and 32,000,000 
pounds until 1924, and then decreased to 5,657,000 pounds in 1925. 
The United States catch in this lake has been two to three times as 
large as that of Canada during the years 1913 to 1924. In 1925 
the catch was about equally divided between the two countries. 
The trends of catch have been similar in each country, though the 
decline in 1925 was more severe in the United States than in Canada. 
The yield of lake herring was 15,301,000 pounds in 1913, reached a 
high peak of 26,536,000 pounds in 1918, and declined to 16,232,000 
pounds in 1925. The vast majority of the lake herring were produced 
in the United States. The yield of chubs (a fish sometimes classed 
with the cisco or lake herring) registered 5,492,000 pounds in 1913, 
a high peak of 8,094,000 pounds in 1918, and a decline to 6,445,000 
pounds in 1925. Only about 6 per cent of each year’s catch was 
contributed by the Canadian chub fisheries. 
The yield of lake trout has remained fairly constant over this 
period, with a yield of 16,238,000 pounds in 1913, increasing to 
18,206,000 pounds in 1919, and then decreasing to 17,985,000 pounds 
in 1925. This is true in both the United States and Canada, although 
the production in the United States was always about twice that for 
Canada. The yield of whitefish also has remained almost unchanged, 
with a reported production of 8,797,000 pounds in 1913, rising to 
11,405,000 pounds in 1918, and then slightly declining to 9,328,000 
pounds in 1925. In each year of this period the production in Canada 
exceeded the catch in United States waters by several hundred 
thousand pounds to over 2,000,000 pounds. 
The total yield of blue pike has shown successive periods of very 
high and very low production. In 1913 the total yield amounted 
to 2,370,000 pounds, then increased to 23,693,000 pounds in 1915, 
decreased to 2,130,000 pounds in 1918, increased again to 16,703,000 
in 1922, and decreased again to 13,958,000 pounds in 1925. The 
catch in the United States usually has been much larger than in 
Canada—in some years nearly four times as large. The only excep- 
tion is found in 1919, when the Canadian catch was considerably 
larger than the United States catch. In general, the fluctuations 
in the two countries have been very similar. The total yield of 
yellow pike was about 4,077,000 pounds in 1913, increased to 
6,795,000 in 1914, and then declined to 4,663,000 pounds in 1925. 
Since 1916 the United States catch has tended to decrease and the 
Canadian catch to increase. In 1916 the United States catch was 
about 70 per cent larger than the Canadian catch, but since 1923 
the catches of the two countries have been about equal. 
The total yield of yellow perch, varying between 5,443,000 and 
7,966,000 pounds, was relatively constant during the period 1913 
to 1925, although the United States catch has declined while the 
Canadian catch has increased. In the early part of this period 
the United States catch was about five times the Canadian catch, 
but since 1922 it has been less than twice the Canadian catch. 
