effect of entraining eggs and larvae has been related to adult fish 

 stocks with the equivalent adult calculation (Horst 1975) . This is a 

 conservative model that requires minimal data and should produce over- 

 estimates of impact (Horst 1980). Conducting entrainment mortality 

 studies would provide information that would reduce the large numbers of 

 ichthyoplankton that are assumed to be killed by entrainment. The use 

 of a population model similar to the proposed stochastic model for 

 winter flounder would provide more definitive information on the effect 

 of entrainment on adult fish populations. 



Recommendations 



We recommend that the present ichthyoplankton program be continued 

 into the operational period of Unit 3 with the following modifications: 



1) Discontinuation of fish egg identification from fall and 

 winter (October through March) entrainment samples. 



2) Replacement of the presently used (January through September) 

 entrainment sampling scheme with the more efficient, recently 

 proposed, eight samples per week scheme (one day and one night 

 sample on 4 days weekly) . 



We also recommend that following studies be implemented to adequately 

 assess the impact of 3 Unit operation. 



1) Development of site specific estimates of egg and larval 

 mortality caused by entrainment. 



2) Identification of the primary source areas of dominant ichthyo- 

 plankton, the associated densities, and entrainment losses 

 (winter flounder is of primary interest) . 



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