Stiramary 



1, During the spring of 1952, IjlSU adult shad in/ere transported 

 from the head of Chesapeake Bay near Perryville, Maryland, to stocking 

 locations above Conowingo and Safe Harbor Dams on the Susquehanna River, 

 All but 19 fish were tagged before release. 



2, Five hundred shad were tagged and released at the head of 

 Chesapeake Bay to serve as a control. 



3, Of the shad planted above Conowingo Damj 89 percent survived 

 to point of planting^ while of those planted above Safe Harbor Dam, only 

 68 percent survived. Thus the survival rate of the shad decreased as the 

 hauling distance increased, 



U» Vv'e believe that a higher survival rate would have been 

 obtained if the hauling tanks had been larger and arranged so that the shad 

 could sviTim and respire in a normal manner. 



5o Forty of the tagged shad were retaken by the commercial fish- 

 ery in Maryland, 



6. Most of the shad that descended the dams probably came throigh 

 the floodgates . 



7. Authentic reports indicate that a large number of the planted 

 shad died above the dams. 



8. Attempts were made to locate juvenile shad in order to deter- 

 mine the success of spaiivning of the planted shad, but none were found. 



9. From tag recoveries it was determined that 5I06 percent of 

 the shad present vrere taken by the commercial fishery during the 19^2 shad 

 season and that 77 of the planted shad passed downstream over Conowingo 

 Dam, There was no significant difference between the survival rate of the 

 shad planted above Conowingo Dam and that for the shad tagged at the head 

 of Chesapeake Bay. 



10. It was estimated that somevifhat more than ^0 of the 967 shad 

 planted at Columbia, Pennsylvania, successfully passed downstream over 

 Safe Harbor, Holtwood, and Conowingo dams. 



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