migration of marine demersa] fishes. If adults were moving along the 

 shoreline in search of a particular estuary, then the intake currents at 

 MNPS may have attracted individuals seeking to enter the river for 

 spawning. The larger number of males impinged than females may have 

 been related to their generally smaller size and therefore lower 

 sustained swimming speeds (Beamish 1966; Terpin et al. 1977) which would 

 have allowed fewer of them to escape from the intake area. 



Entraiiiment 



Winter flounder larvae were present in entrainment samples at EN 

 from late February through late June with the highest densities in April 

 and May (Fig. 11). Most of the larvae entrained were developmental 

 Stage 3 (Fig. 12). The 1983 median entrainment density (47. 5 per 500 

 m"*) and total entrainment estimate (54. 7 million) were the second 

 highest estimates since 1976 (Table 19). However, due to the overlap in 



Table 19. Yearly median densities of winter flounder larvae in entrainment 

 samples during their season of occurrence and annual entrainment 

 estimates with 95% confidence Intervals for MNPS Units 1 and 2 



from 1976 through 1983. 



95% CI (x 10^) 

 30.4-97.7 

 10.7-39.0 

 23.5-85.9 

 15.1-57.7 

 32.9-117.6 

 10.5-48.3 

 20.5-51.2 

 35.7-126.1 



confidence intervals, no significant differences were found in annual 

 entrainment estimates among the years. 



A total of 135 winter flounder larvae were collected in the 

 entrainment mortality studies during II sampling sessions (Table 20). 

 During the study the effluent AT ranged from 8,0 to 11.5 C. Of the 24 



50 



