among months in proportion to variability. The number of samples was 

 then reduced in approximate increments of 10% with the restriction that 

 at least 3 samples per month should be taken. By redistribution of 

 sampling effort through optimal allocation, the present impingement 

 sampling effort for winter flounder could be reduced by almost half to 

 achieve the same precision in the estimate. 



It should be noted that the above analysis concerned only the 

 winter flounder and ignored other potentially important species which 

 may be more abundant during other months of the year. The same optimal 

 allocation of sampling effort analysis appeared in the Impingement 

 Program Evaluation using the data for nine selected abundant fishes and 

 macro invertebrates. A similar conclusion was reached in that most 

 sampling should be scheduled for January and February. The largest 

 difference between the analysis for the nine species and the one for 

 winter flounder was the latter assigned more samples to March and fewer 

 in December than the former. 



Future installation of fish return sluiceways at Units 1 and 3 

 should significantly reduce impingement mortalities as winter flounder 

 generally have good survival following impingement and sluiceway passage 

 (Table 33 ). Successful installation should greatly reduce the effects 

 of plant operations on juveniles and adults. After construction, followup 

 studies will be undertaken to measure the effectiveness of the sluiceway 

 return systems in reducing mortalities and preventing recirculation of 

 fish back to the screens. 



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