Q. 



< 

 CC 



z 

 liJ 

 o 



q: 



UJ 



a. 



15 20 



MINUTES 



25 



Fig. 2. 



The burrowing ability of juvenile clam, of various sires 

 exposed to a current velocity of 13 cm. oer second. 

 SoUd circles — Cumulative percentage of clams which 

 burrowed. Open circles - Cumulative percentage of clams 

 washed into sediment trap and therefore unable to burrow. 

 The corresponding size groups together with the inactive 

 clajns (not represented) total IOO94 at any given time 



