THE WHITEFISH PRODUCTION OF THE GREAT LAKES. 669 
TABLE 12.—COMPARISON OF THE AVERAGE CATCHES AND PLANTS OF WHITEFISH IN MICHIGAN AND 
CANADIAN WATERS OF LAKE HURON FOR THE THREE FIVE-YEAR PERIODS 1892 TO 1906, INCLUSIVE. 
Michigan waters, whitefish area 3,200 square miles.4 
Catch. Plant. Nets. 
Years. 
Pounds Pounds Fry per Fry per Fathoms 
Total Total f | Total 
per square] per net- square pound per square 
pounds. mile. fathoms. fry. mile. caught. fathoms. mile. 
1892-1896 -__ 501,000 158 ©.99 | 17,958,000 5.559 36 525,400 164 
1897-1901 __ 480,000 148 -79 | 20, 258,000 6 271 2 847,100 264 
1902-1906______- 515,000 159 +58 | 29, 400, 000 9, IOr 58 991,700 309 
Canadian waters, whitefish area 3,000 square miles. 
1892-1896__ 1,657.000 552 3-07 3,000,000 I,000 1.8 589, 100 196 
1896-1901 __ = 940,000 313 2.24 3,720,000 I. 240 3-9 457,100 I50 
I902-1906_-___---| 1,051,000 350 1.45 4,000,000 1.333 3-8 742,500 244 
@ From Mackinaw City to Port Huron. 
b North Channel and Lake Huron exclusive of Georgian Bay. 
TABLE 13.—SHOWING THE AVERAGE CATCHES AND PLANTS OF WHITEFISH IN GEORGIAN Bay WATERS 
FOR THE THREE FIvE-YEAR PERIODS 1892-1906, INCLUSIVE. 
Whitefish area 2,700 square miles. 
Catch, Plant. Nets. 
Years. 
Pounds Pounds Fry per Fry per Fathoms 
Total Total Total 
per square| per net- square pound per square 
pounds. mile. fathom. fry. mile, caught. fathoms. mile. 
1892-1896-__ I,535,000 568 POT) hy Re ets ee al Sao ae eee 617,300 228 
1897-190r-_- 450,000 166 -92 410,000 152 I 508, 600 188 
1902-1906 __ 423,000 156 yf) Rep ee ae |e eecers| ee oe aeeg 515,300 I9t 
We appear to have disclosed in Lakes Superior and Huron a relation between 
the plant of whitefish fry and the catch of a subsequent period of such a sort that 
when the plant has been considerable the catch has either been maintained or 
has increased, while when the plant has been small the catch has usually dimin- 
ished. There are no statistics available which enable us to compare for long 
periods the data for the two sides of the same lake, except those for Lakes 
Superior and Huron, but it will be of interest to compare with these two lakes 
Lakes Erie and Ontario and parts of Lake Michigan. 
Canadian waters of Lake Erie and Lake Ontario.—The only statistics avail- 
able for continuous periods are those of the Canadian sides of these lakes, but 
these are of especial interest, because they enable us to compare Canadian waters 
in which there has been relatively heavy planting of whitefish fry with those in 
which the plant has been light. The Canadian whitefish areas of Lake Erie, 
