2-4 



Extensive studies of water mass movement and general water 

 circulation in the Sound have been undertaken during the past 20 years. 

 The majority of the early work was carried out from the Bingham Oceano- 

 graphic Laboratory, Yale University; thus, Riley (1956, 1959) and Riley 

 and Conover (1956) provided data concerning general circulation and 

 hydrographic parameters for the Central Sound. More recent studies of 

 circulation in the western and to a lesser degree central Sound have 

 been conducted from SUNY by Hardy and Weyl (1970), Hardy (1972), and Jay 

 and Bowman (1975) . 



PLANKTON 



Investigations of the plankton community generally include 

 zoo-, phyto-, and ichthyoplankton populations. These populations form 

 the base of the food chain and, because of their importance, have been 

 widely studied in greater Long Island Sound. Data from New Haven Harbor 

 are available from studies conducted by NAI for United Illuminating Co. 

 (Raytheon, 1970a, 1971, and NAI, 1973, 1974a, 1974b, 1975a, 1976a, 

 1977a, 1978a) . This information provides baseline preoperational and 

 operational data on zooplankton, phytoplankton and ichthyoplankton 

 populations in the harbor, and is the basis for this summary report. 



The earliest studies of greater Long Island Sound plankton 

 were undertaken during the early to mid-1950' s. During this period, 

 programs conducted through the Bingham Oceanographic Laboratory included 

 studies of zooplankton (Deevey, 1956), ichthyoplankton (Richards, 1959) 

 and phytoplankton (Conover, 1956, and Riley and Conover, 1967) . The 

 greatest emphasis of these studies was placed on populations from the 

 central region of the Sound. During the 1970 's extensive work was done 

 on inshore and near- shore plankton populations in the central region of 

 the Sound as part of power-plant baseline and monitoring programs . 

 Thus, at Bridgeport a small-scale zooplankton sampling program was 

 conducted as part of an operational monitoring program during summer and 

 fall of 1971 (NAI, 1973b) . Sv±)stantial work has also been conducted for 



