Copepods are particularly affected by predation, and the copepod Microsetella 

 norvegica was found to be part of the diet of the fishes. In Penobscot Bay, 

 predation may be in part responsible for the fact that there was only one peak 

 in copepod abundance (in late summer) , rather than two (spring and fall) as 

 has been reported by a number of investigators in other areas (Bigelow 1926; 

 Marshall 1949; Deevey 1956; and Martin 1964). 



Two species of squid, flying squid and long-finned squid, are found in the 

 waters of coastal Maine. The flying squid is the more common of the two 

 species and is found in large schools in nearshore waters during summer, 

 particularly in the northeastern regions (5 and 6) of the characterization 

 area. Long-finned squid, which is the most common inshore squid species in 

 southern New England, is found in low numbers (relative to the flying squid) 

 in Penobscot Bay, (region 4) and infrequently in the Bay of Fundy (region 6). 



Nothing is known about the distribution or abundance of squid in Maine. 

 Flying squid are important predators in the characterization area, because 

 they seize fishes (herring and mackerel) and kill large numbers of 

 individuals. These squid have been observed in bays and harbors of region 6 

 hurling themselves out of the water (sometimes landing on boats or the shore) 

 in the frenzy of attacking fishes. 



-f 



4 



^" 



^'^^- 



Figure 4-24. 



Mean seasonal volumes of zooplankton in Gulf of Maine 

 coastal areas in 1965 and 1966 (Sherman 1968). 



4-69 



10-80 



