784 



Fishery Bulletin 97(4), 1999 



For example, it has been shown that poohng blue- 

 fish diet by age or size class may over- or under-esti- 

 mate the impact of bluefish compared with estimates 

 of impact obtained when using age or size partitioned 

 diets. Additionally, the diet of bluefish in estuaries 

 (Oviatt, 1977; Hartman and Brandt, 1995c; Buckel 

 et al., 1999a), where YOY bluefish are known to be 

 dominant piscivores, was not considered here. Buckel 

 et al. (1999a) showed that YOY bluefish in the 

 Hudson River estuary are key predators on YOY 

 striped bass and that recruitment success of striped 

 bass is negatively correlated with YOY bluefish abun- 

 dance. In the Chesapeake Bay, the percentage of 

 menhaden in bluefish diet can be over 807f of the 

 diet by weight (Hartman and Brandt, 1995c), much 

 higher than the diet proportion we used in our analy- 

 ses. A synoptic study examining the diet on the shelf 

 and estuarine environments, as well as temporal and 

 spatial distributions, will be required to determine 

 the exact proportions of prey items in the coastal 

 bluefish population. 



Acknowledgments 



We thank M. Terceiro who kindly provided bluefish 

 stock assessment information. Critical reviews were 

 provided by R. Cerrato, R. Cowen, G. Lopez, and an 

 anonymous reviewer. This research was funded by 

 the National Oceanic and Atmospheric Administra- 

 tion (NOAA) Coastal Ocean Program and by NOAA 

 award no. NA90AA-D-SG078 and no. NA46RG0090 

 to the Research Foundation of SUNY for the New 

 York Sea Grant Institute. This work was prepared 

 for publication while J. A. B. held a National Research 

 Council-NOAA Research Associateship. 



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