13-21 



summer migrants. Two resident species, winter flounder and windowpane, 

 were usually dominant. Other common resident species included cunner, 

 pii:)efish, tautoy and the grubby. Long Island Sound residents which were 

 abundant generally during May and June and October through December 

 included heikes, silver hake, little skates, fourbeard rockling and rock 

 gunnel. Summer migrants frequenting New Haven in abundance included 

 scup, striped and northern searobins, and smooth dogfish. Several 

 flatfishes which were found in New Haven in the summer months included 

 summer flounder, hogchoker, fourspot flounder and Gulf Stream flounder. 

 Overall abundance was highest during the summer nursery period and 

 lowest in midwinter, when only the winter flounder and windowpane were 

 active . 



Pelagic fishes (water column) included the winter migrant, 

 Atlantic herring (Clupea harengus) ; anadromous species which, for the 

 most part, utilized New Haven Harbor to a small degree as a pathway to 

 spawning grounds (alewives , bluebacks, shad, smelt); and summer migrants, 

 which included blue fish, weakfish, kingfish, butterfish, menhaden, bay 

 anchovy, mackerel and northern puffer, in addition to the anadromous 

 striped bass. Peak abundance for this assemblage was in midsummer, when 

 weakfish, anchovies, bluefish and menhaden schools were most dense. 



Impacts 



The operation of a steam electric generating station may 

 directly impact finfish species which frequent the waters used for 

 condenser cooling in three ways: 1) entrainment of planktonic eggs and 

 larvae through the cooling water system; 2) impingement of adults and 

 juveniles on cooling water intake screens; and 3) encounter at all life- 

 history stages with heated waters. Indirect impacts on finfish popu- 

 lations may also occur as a result of direct impacts on other ecosystem 

 components or other finfish. 



