6- 



5- 



3 - 



2 - 



OH 



—I 1 1 1 1 r- 



76 77 78 79 80 81 



83 



84 85 86 87 



YEAR 



TABLE 9. Annual abundance indices of American sand 

 lance, expressed as an annual sum of means, and trawl 

 catch as annual CPUE at Shoreham Nuclear Power Sta- 

 tion (SNPS), and 5-mean catch of the National Marine 

 Fisheries Service (NMFS) spring trawl survey at selected 

 stations. 



Fig. 3. American sand lance larval abundance estimates and 95% confidence intervals based on the a parameter from 



the Gompertz function for stations EN and NB. 



et al. (1979) reported that the average trawl catch 

 in the spring for an area north of Cape Cod 

 during the 1967-75 period was near 0, increased 

 to 50 in 1976, and exceeded 10,000 in 1977. It 

 appears that the dechne of larvae in the Millstone 

 area resulted from the regional decrease of adult 

 stocks, which are returning to levels similar of the 

 early to mid 1970s. 



Anchovies 



Two anchovy species, the bay anchovy and the 

 striped anchovy, have been collected in the Mill- 

 stone area. Based on the proportion of eggs col- 

 lected for each species, the bay anchovy was by 

 far the most common in the area (more than 

 95%). In addition, nearly all specimens collected 

 by trawl and in impingement collections were the 

 bay anchovy. Due to the preponderance of the 

 bay anchovy and the difficulty in separating the 

 two species in larval and juvenile stages, the re- 



Sums for 1977-82 based on mean density per sam- • • j- • -ii r iU„ ^ , „„„u„.„, 



, , ■ ,r- , T- u ,oo-,v jr ,oo, <,<: u J maming discussion Will focus On thc bay anchovy, 



pling trip (Geomet Tech. 1983) and for 1983-86 based .,,.-,/- • i , 



on monthly mean density (EA Eng., Sci., and Tech. With the relatively few stnped anchovy eggs m- 



1987). eluded in egg abundance estimates. 



268 



