Stone and Jessop. Seasonal distribution of Alosa pseudoharengus and A aestivalis 



385 



4H 



y Fall 



i 19 cm 



-^■" 



..':»:3>' 



T I I I I I I I I I I I 



70 68 66 64 62 60 58 





V / Fall 



,y'--^^'' > 1 9 cm 



— I — I — I — I — I — I — I — I — r 

 68 66 64 62 60 58°N 



Figure 9 



Set locations for catches of river herring < 19 cm FL and >19cmFLfrom spring (1979-89), summer (1970-89), 

 and fall (1978-84) groundfish surveys conducted off the Atlantic coast of Nova Scotia. 



planktivores. Stomach contents of river herring col- 

 lected on Georges Bank and the Scotian Shelf consisted 

 mainly of euphausiids and calanoid copepods (Vino- 

 gradov 1984). These prey items are concentrated dur- 

 ing winter and spring in deep basins of the Scotian 

 Shelf (Sameoto and Herman 1989, Herman et al. 1991) 

 as well as the outer Shelf and Shelf Slope (Sameoto 

 1982). Calanoid copepods dominate zooplankton pro- 



duction on Georges Bank during spring (Sherman et 

 al. 1987) and are abundant during summer and fall in 

 the eastern Gulf of Maine-outer Bay of Fundy region 

 (Emerson et al. 1986) along with large populations of 

 euphausiids (Kulka et al. 1982). Aggregations of river 

 herring during spring on the central Shelf, Shelf Slope, 

 and Georges Bank, during summer in the Bay of 

 Fundy-eastern Gulf of Maine, and during fall in the 



