may occur in late autumn and winter (Bertrand 1977) . 



In the Gulf of Maine and Bay of Fundy, M, norvegica is an important 

 member of the pelagic population (Fish 1925; Fish and Johnson 1937), 

 although it was not recorded by Bigelow (1926), because of the larger mesh 

 size which he used. Fish (1925) suggests that three to four generations 

 were produced by M. norvegica in the Gulf of Maine between March and September, 

 and spawning probably occurred in late March, late May, July, and mid- 

 September. 



6.) Temora longicornis 



T^. longicornis is most abundant in terms both of numbers and volume 

 in Penobscot Bay in summer and fall, disappearing in winter (Bertrand 1977). 

 In Boothbay Harbor T^. longicornis also has a peak abundance in the late 

 summer-early fall, but is found throughout the year (Sherman 1976). His data 

 suggests a continuous breeding cycle from March to December, similar to that 

 of other inshore populations, i.e. Montsweag Bay and the Damariscotta River. 

 Bertrand (1977) suggests that there are four to five generations of T^. 

 longicornis in the outer Penobscot Bay (May to October) and two to three 

 generations in the inner bay (August to October) . He also feels that some 

 of the population of the outer bay is transported to the inner bay, there- 

 fore augmenting the population in the inner bay. No observations on the 

 breeding of T^. longicornis have been made for the population in the Gulf 

 of Maine. 



Generally, the seasonal maximum of T^. longicornis occurs earlier to 

 the southward. In Long Island Sound (Deevey 1956) and Block Island Sound 

 (Deevey 1952) highest numbers were recorded in late spring or early suiuner, 

 while in the Gulf of Maine (Bigelow 1926) and at Woods Hole (Fish 1925) 

 it was found abundantly during winter. In estuaries and bays along the 

 Maine coast the situation is different from that in the open waters of the 

 Gulf of Maine. The population of T^, longicornis in Montsweag Bay, the 

 Damariscotta River, Penobscot Bay, and Boothbay Harbor, was most numerous 

 in the late summer and fall (Lee 1974; McAlice 1971 to 1977; Bertrand 1977). 

 It appears that this euryhaline copepod has seasonal occurrence of maximum 

 density that is dependent to a large extent on temperatures within the 

 range of 57 to 64°F (14 to IS^C) (Bigelow 1926; Deevey 1956; Lee 1947; and, 

 McAlice 1971 to 1977). 



7.) Oithona similis 



The Oithona population in Boothbay Harbor and Penobscot Bay follows 

 a pattern of abundance somewhat similar to Montsweag Bay and the Damariscotta 

 River estuary (i.e., maximum in late summer and fall). The population is 

 only slightly reduced in summer in the coastal waters where the water 

 temperature is cooler than in Montsweag Bay or the Damariscotta River (Lee 

 1974; McAlice 1971 to 1977). In the Gulf of Maine, 0^. similis is predomin- 

 antly a winter species (Bigelow 1926) . 



(Continued) 



4-F-3 



10-80 



