9 
RATES OF GROWTH 
The scales were used in determining the rates of growth of the various species 
of ciscoes. The growth areas are usually well marked. Scales from approxi- 
mately the following number of fish of each species were examined: L. eriensis 
rrr 
S85 geonep fan 
SBR! BS RReeeesnee58 
af TTY 
Sueezsaeeees saaeeseessaesseszaes7 
geseesceste 
Pog 
Supa ul aby 
piste totetol H 
Srssssess re titteeeesssziit 
Poo seeeaas 
10 15 20 825 30 
Length in Centimeters 
Fig. 2.—Graph illustrating rates of growth of ciscoes in Lake Erie a=L. artedi, p=L. prognathus, 
 e=L. eriensis, sh=L. sisco huronius. 
Tecell 
