GRAHAM:. RETENTION OF LARVAL HERRING 



did not represent the many changes that pro- 

 bably occurred in tidal currents with time. 

 These currents change not only their velocity 

 but their type of flow as well (Graham and 

 Venno, 1968). 



ACKNOWLEDGMENT 



I am indebted to Bruce C. Bickford who op- 

 erated the buoyed and anchored nets in the chan- 

 nel, sometimes during severe weather. 



LITERATURE CITED 



BOUSFIELD, E. L. 



1955. Ecological control of the occurrence of 

 barnacles in the Miramichi estuary. Natl. Mus. 

 Can. Bull. 137, 69 p. 



Graham, J. J., and P. M. W. Venno. 



1968. Sampling larval herring from tidewaters 



with buoyed and anchored nets. J. Fish. Res. 



Board Can. 25:1169-1179. 

 Graham, J. J., and C. W. Davis. 



1971. Estimates of mortality and year-class 

 strength of larval herring in western Maine, 

 1964-67. In A. Saville (editor) , Symposium on the 

 biology of early stages and recruitment mechan- 

 isms of herring, p. 147-152. Cons. Perm. Int. 

 Explor. Mer., Rapp. P. -V. Reun. 160. 



Graham, J. J., S. B. Chenoweth, and C. W. Davis. 



1972. Abundance, distribution, movements, and 

 lengths of larval herring along the western coast 

 of the Gulf of Maine. Fish. Bull., U.S. 70 :307-321. 



Pearcy, W. G., and S. W. Richards. 



1962. Distribution and ecology of fishes of the 

 Mystic River estuary, Connecticut. Ecology 

 43:248-259. 

 Stickney, a. p. 



1959. Ecology of the Sheepscot River estuary. 

 U.S. Fish Wildl. Serv., Spec. Sci. Rep. Fish. 309, 

 21 p. 



305 



