FISHERY BULLETIN VOL, 77. NO 1 



here for B. tyrannus, and, if necessary, the preci- 

 sion of embryo age estimates by this method can be 

 improved by increasing the number of develop- 

 ment stages of approximately equal duration in 

 the embryo stage classification scheme. 



ACKNOWLEDGMENTS 



I thank the field research team from the New 

 York Ocean Science Laboratory, Montauk, N.Y., 

 for their assistance in the capture of ripe menha- 

 den. I thank John L. McHugh, Marine Sciences 

 Research Center, State University of New York at 

 Stony Brook; and Herbert M. Austin, Virginia In- 

 stitute of Marine Science, for reviewing an earlier 

 draft of the manuscript. Thanks also to Fishery 

 Bulletin reviewers for constructive criticism of the 

 manuscript. Special thanks to George C. Wil- 

 liams, State University of New York at Stony 

 Brook, for reviewing the manuscript and for 

 assistance and support throughout the research. 



Research for this paper was financially sup- 

 ported in part by NOAA, Sea Grant Project 

 2-35281 to G. C. Williams, and by Grant-in-Aid 

 emd University Awards from the State University 

 of New York at Stony Brook Research Foundation, 

 and 1977 and 1978 summer Biomedical Research 

 Grants to the author. 



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