Table 1. Tagged scallop recapture Fippennies Ledge, Gulf of 

 Maine July 1986 - July 1987 



Scallop 

 Treatment 



Number 

 Tagged 



Number 

 Recaptured 



Percent 

 Recapture 



Initial Live 

 LIVETAG 

 LIVEDE+LIVEDI 

 TOTAL 



Initial Dead 



DEADE+DEADI 

 TOTAL 



TOTAL 210 



105 



105 



146 



20 

 41 

 61 



85 

 85 



70 



19 

 39 



58 



81 

 81 



This data includes two living and 18 dead caged scallops. 

 Because a significant sample size of tagged scallops was 

 collected outside of the cages and because of the potential 

 experimental errors introduced by the cages, none of the caged 

 scallops were used in the following analyses. 



Tagged Scallop Population Characteristics 



Growth. 



The Walford regression calculated from the initial and final 

 shell height measurements for the recaptured live tagged scallops 



(LIVETAG) was L t+1 = 36.01 + 0.96L t with an r-value 



of 



0.97. The 

 is shown 



initial shell height and growth rate for these scallops 

 in Figure 1 (r = 0.82). 



Movement. 



Sixty percent of the initially live tagged scallops 

 (LIVETAG, LIVEDE, and LIVEDI), from the two undisturbed release 

 sites on Fippennies Ledge, were recaptured. This high percentage 

 of scallops, recaptured within a ten meter radius of where they 

 had been released a year earlier, demonstrates that tagged sea 

 scallop movement was minimal. The live tagged scallops (LIVETAG) 

 recessed into small pits, and were observed to be uniformly 

 spaced. 



Mortality and shell deterioration. 



Sixty-seven percent of the uncaged tagged live scallops died 

 during the yearlong experiment, and 80 percent died inside the 

 cages. The tagged live scallops that died (LIVEDE and LIVEDI) 

 were used to evaluate the condition of the hinge and resilium 

 over different lengths of time. The length of time that a 



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