2 
that the 
Fig. 3 
b) 
therefore 
curve for this species should lie to the left of the curve for L. eriensis. 
The length in centi- 
meters is from the tip of the snout to the base of the caudal fin; the girth just 
anterior to the dorsal fin. 
J 
It is possible 
10 
The following table gives the data obtained 
In the majority of scales some of the winter 
140; L. artedt 55; L. sisco huronius 55; L. prognathus 150. The results are 
shown in Fig. 2. Considerable difficulty was experienced in estimating the 
rate of growth of L. sisco huronius. 
bands were difficult to distinguish and there was evidence that in some cases at 
for the three important commercial species in Lake Erie. 
least one winter band was not recorded. 
shows the relation of age to weight. 
SSnaEnsssasseessasessesssesssesesssesesz pt 
| 
HH 
EH 
: i fs aH cieesiies 
sbrezeseeee cit scree cI ft Bank cy bites sfeict : Beer ci 
Hs aa i HE zi He f sess! sees EF cH fH 
SEreereenaria Heeiuiascritteiy 
Pa 
oe 
oon 
A 
V 
Foo 
Ha, 
Per 
oe 
Sia 
cai 
=< 
ry 
Age in Years 
L. artedt, p=L. 
a 
Weight in Ounces 
82 
Fig. 3.—Graph illustrating relation of weight to age of ciscoes in Lake Erie. 
prognathus, e=L. eriensis. 
