Chase et a!.: Reproductive life history of anadromous Osmerus mordax in Massachusetts 
165 
16 
14 
_ 12 
03 
O 
o 
S 10 
DC 
Q, 
m 8 
6 
4 
16 
14 
_ 12 
w 
o 
o 
S 10 
□c 
0. 
uj 8 
6 
4 
Miramichi River 
Parker River 
Jones River 
Fore River 
Jones River 
Saugus River 
Trawl survey 
Parker River 
0 0.1 0.2 0.3 0.4 
B 
0.5 
F 
0.6 0.7 0.8 0.9 1.0 
0.3 
0.3 
0 0.1 0.2 0.3 0.4 
0.5 
F 
0.6 0.7 0.8 0.9 1.0 
16 1 C 
14 
_ 12 
m 
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9 . 10 
CG 
CL 
m 8 -\ 
0.268 
0.268 
0.268 
0.000 
0.268 
0.000 
0.1 0.2 0.3 0.^ 
0.5 
F 
0.6 0.7 0.8 0.9 1.0 
Figure 8 
Eggs-per-recruit curves, which examine variation in lifetime fecundity in response to 
changes in fishing mortality (F), for anadromous rainbow smelt sampled in Massachu¬ 
setts in 4 coastal rivers with fyke nets in 2005-2007 (this study) and in marine waters 
during a trawl survey in 2004—2007 (this study) and sampled in the Miramichi River, 
Canada, in 1949-1953 (McKenzie, 1964), the Parker River in 1974-1975 (Murawski and 
Cole, 1978), and the Jones River in 1979-1981 (Lawton et al., 1990). (A) Curves for fish 
collected from several sampling locations in this study and in previous studies, with the 
proportion of fish mature at age (PMAT) assigned as 0.6 for all but one of the locations 
and as 0.0 for the Miramichi River. (B) Curves with the PMAT set as 0.6 and 0.3 for 
samples from the Parker River (gray lines) and Jones River (black lines) for previous 
studies (solid lines) and this study (dashed lines). (C) Curves with the F component of 
Z set as 0.268 or 0.000 for samples from the Parker River and Jones River for previous 
studies and this study. 
