SEASON 

 Wl NTER 



SUMMER 



:ngth 



20 



40 



60 B 



80 fei^iXiJ-^^a 



1 00 ^ggsgggg^sgsgs^g^ 



1 20 



20 



40 



60 



SO 

 1 00 

 1 20 



20 



40 



60 I 



SO p 

 100 

 1 20 



20 



40 



60 



80 

 1 00 

 1 20 



1 000 2000 

 FREQUENCY 



2000 4000 

 FREQUENCY 



SsXS^rtb%i^i 



5000 TOOOO 

 FREQUENCY 



TRAWLED 



I MP I NGED 



Figure 13. Length frequency distribution of silversides by season. 



wide (and overlapping) 95% confidence intervals in Figure 15. Because NUSCo (1984b) found that catches 

 from GN, a control station located away fi-om the influence of MNPS, were correlated with catches from 

 WP, a potentially impacted station, the apparent declines in both seine and trawl catches were attributed 

 to a regional decline unrelated to the construction and operation of MNPS. 



Silversides abundance was well described by the time-series models for seine data (R > 0.80; Appendix 

 XIX) and impingement data (R = 0.75; Appendix XX). All models had an annual periodic component, 

 except the seine model for JC station which had only a 6-mo period. Summaries of these baseline models 

 are presented in Appendices XIX and XX. 



Microgadus tomcod, Atlantic tomcod 



The Atlantic tomcod {Microgadus tomcod) is the most abundant member of the cod family collected 

 in the monitoring programs at MNPS. It ranges along the Atlantic coast of North America from 



39 



