m DAY 



NIGHT 



O 

 O 



o 



o 

 o 



3 

 _l 



o 

 > 



o 



< 



_l 

 Q. 

 O 

 O 

 M 



O 

 O 



o 



O 



o 



o 

 > 



o 



h- 



< 



_) 



Q. 

 O 



o 



Nl 



100 150 



DEPTH (METERS) 



200 



300 



FIG 3. COMPARISON OF AVERAGE ZOOPLANKTON VOLUMES RESULTING FROM DAY AND 



NIGHT HORIZONTAL HAULS AT DIFFERENT DEPTHS; CRUISES 4 AND 6, HUGH M.SMITH . 

 (NUMBER OF SAMPLES IS INDICATED ABOVE EACH BLOCK). 



