Soma information on zooplankton concentrations in waters 

 to the north and east of Hawaii is furnished by the Northern Kolidaj'' 

 Expedition of Scripps Institution of Oceanography and cooperating 

 agencies£/s conducted in August-September 1951 , The resulting data 

 may be compared with those of POFI for the Hawaiian and equatorial 

 regions as generally similar methods were employed in making the 

 hauls and in processing the collections o Table 15 presents data^ 

 collected on the Virestemnost stations of the expeditions which in- 

 dicate in general a marked increase in zooplankton concentration 

 with increasing latitude o Two chief differences are apparent between 

 these data and those for the Hawaiian areas (1) the latitudinal 

 means for the Northern Holiday Expedition are^ with one exception 

 (35° 00« - 39° 59' No latitude) , considerably larger, and (2) there 

 is a much greater variation among the individual volumes than appears 

 in the Hawaiian samples » We believe that this high variation among 

 plankton volumes taken within a relatively short interval of space 

 and time is particularly characteristic of temperate and higher 

 latitudes and is not found to such an extent^, as indicated by our 

 data, in the tropics and subtropicso 



_/ The plankton collections were processed by Dro E., H., AhlstroHX and 

 staff. South Pacific Investigations ^ Fish and Wildlife Services and 

 were made available to the authors through the courtesy of Di o Ahlstronio 



49 



