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Results from the clam ecology study at Flake Point Bar in the Mason's Bay district of Jonesport were as follows:

High Tide (No Netting):      Survival = 31.1%  Growth = 8.8 millimeters, which is about 3/10ths of an inch

High Tide (With Netting):   Survival = 72.7%  Growth = 9.5 millimeters, which is about 4/10ths of an inch

 

Mid Tide (No Netting):        Survival = 35.2%   Growth = 12.6 millimeters, which is about 1/2 of an inch

Mid Tide (With Netting):    Survival = 60.6%  Growth = 10.6 millimeters, which is about 4/10ths of an inch

 

Low Tide (No Netting):       Survival = 57.8 %   Growth = 10.1 millimeters, which is about 4/10ths of an inch

Low Tide (With Netting):   Survival = 65.3%  Growth = 7.6 millimeters, which is about 3/10ths of an inch.

 

Surprisingly, clam survival in the unprotected upper and mid-tide pots was lower than in the unprotected lower tide pots (average survival for upper and mid-tide clams in unprotected pots was 33.2% compared to 57.8% in the lower intertidal pots).  Growth generally increased with decreasing tidal height, but not much of a difference was observed in growth rate between the mid- and lower tide plots.  Also, surprisingly, predation seemed to be more important at the upper and mid-tide areas of the flat.  Compare survival in protected vs. unprotected pots at those two tidal heights, then compare survival in netted vs. unnetted pots at the lower intertidal.  This is opposite of what we generally observe, which means that these are important results in helping us understand the ecology of this species.  We thank the Jonesport Shellfish Committee for giving permission to use the flats from May through September for this study. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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