34 Frank J. Schwartz, William T. Hogarth, Michael P. Weinstein 



transient and estuarine-dependent (Schwartz et al. 1979, 1979). It 

 thus serves as an important avenue for seasonal migrations of many 

 species along, into, or away from the area, and is vital as a nursery area 

 for the many fishes that depend on estuaries for growth and survivial 

 for part or all of their lives. Although industrial and domestic pollution 

 enter the river, primarily at Wilmington, and may have an indirect effect 

 on fishes such as herrings (Schwartz 1979), they have not as yet 

 seriously affected its vitality for fish survival. 



ACKNOWLEDGMENTS.— We thank the field and laboratory per- 

 sonnel of the University of North Carolina, Institute of Marine Scien- 

 ces; Carolina Power and Light Company; and Lawler, Matusky, and 

 Skelly for their aid with many aspects of this project. Dr. R. Hodson of 

 North Carolina State University provided several larval specimens. The 

 comments of several anonymous reviewers are appreciated. Funding for 

 the project was provided by Carolina Power and Light Company, 

 Raleigh, North Carolina, for which we are grateful. Brenda Bright typed 

 the manuscript. Jane Law and William Link of the Institute of Marine 

 Sciences provided Figure I. 



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