Table 1. Number of zooplankton captured/m /hour, beginning with 0030 on July 16 and 

 continuing through 2300 on July 17, 1982. ST= Students' T test at P;0.05, = no 

 significant difference between this and the previous time interval, + = a significant 

 increase, - = a significant decrease; MWU = Mann Whitney U test at p<0.05, symbols are 

 the same as for ST. 



zooplankton net samples were collected 1 m and 5 m above the reef. (3) A 

 plankton net was towed at the surface from a boat to sample zooplankton just 

 below the surface, and vertical net hauls from 15 m to the surface also were 

 made from the boat. The emergence traps and zooplankton nets were made with 90 

 micron meshes. Two additional emergence traps were constructed with clear 

 polyvinyl. The traps were modified (Ohlhorst, 1980, 1982) from those used by 

 Porter and Porter (1977). 



Five hundred and eighty samples were collected over 6 days and 9 time 

 intervals each day (table 1). Samples were preserved in 5-10% buffered formalin 

 immediately after collection and counted as in Ohlhorst (1982). Preliminary 



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