FISHERY BULLETIN: VOL. 80. NO. 2 



extensive shoals along the New Jersey shore 

 (Fig. 1). The estuary narrows considerably at 

 about river km 56 to form the "lower tidal river" 

 which extends to Marcus Hook, Pa. (river km 

 127). The "upper tidal river" extends to the fall 

 line just north of Trenton, N.J. (river km 222). 

 Delaware Bay is generally polyhaline (18- 

 30 7..), the lower tidal river mesohaline to 

 oligohaline (0.5-187..), and the upper tidal river 

 limnetic (0.0-0.57..) (Tudor 1980). These zones of 

 salinity may be displaced considerably, however, 

 depending upon freshwater flow, tidal stage, and 

 local meteorological conditions. 



RESULTS 



From 1958 to 1980 there were 130 documented 

 captures of Atlantic sturgeon in the Delaware 

 River estuary (Table 1, Fig. 1); 68 in Delaware 



Figure 1. — Locations of recorded captures of Atlantic 

 sturgeon in the Delaware River Estuary, 1958-80. Seasons are 

 defined as winter— December through January; spring — 

 March through May; summer— June through August; fall — 

 September through November. Records- for which precise 

 capture locations are not known are also given. 



PENNSYLVANIA 



DELAWARE CITY 



TRENTON 



10 20 



PICKERING 



DELAWARE 



Additional Records 

 (j) Delaware Bay 

 , Q] Lower Delaware 

 Bay 



ATLANTIC 

 OCEAN 



Table 1.— Recorded captures of Atlantic sturgeon, Acipenser oxyrfujnchus, in the Delaware River estuary. November 1958-July 1980. 



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