290 
BULLETIN OF THE BUREAU OF FISHERIES 
It is quite possible that the most significant phase of the study of condition in 
these four cisco populations does not he in the determination of average values of # 
for the different stocks but lies rather in the study of the change of condition with 
increasing length. This is particularly true since the separation of the lakes with 
respect to the manner of change of # with increased length is much sharper than it 
is with respect to the average value of # in the entire population. The significance 
of the changes of # with length will become more apparent with the examination of 
120 150 2 00 250 300 350 400 
LENGTH IN MILLIMETERS 
Figure 10.— Theoretical values (in 1931) of the coefficient of condition (K) at different lengths, calculated from equations of the 
type K=CX10 5 L“>. Trout Lake, ; Muskellunge Lake, — . — ; Silver Lake (females), — ... — ; Clear Lake (fe- 
males), . 
the equations that describe # as functions of length. These equations for 1931 (the 
only year in which samples were taken from all four lakes) are: 31 
Muskellunge Lake: 
#= 141.924 L ~ °- 94932 
Trout Lake: 
7^=38.7640 Z" 0 - 69245 
Silver Lake (females): 
#=0.12322 X 0 - 45372 
Clear Lake (females) : 
#=0.04555 X 0 ' 64991 
The theoretical values of # at different lengths, calculated from the above 
equations appear in table 69 and are presented graphically in figure 10. 
31 For the purposes of this discussion one equation from each lake is sufficient. The equations for the males of Silver and Clear 
Lakes may be found in table 27. 
