LIST OF ILLUSTRATIONS 



Pags 



Locations of zooplankton stations occupied ty th© Hugh. Mo 



Smith d'oring five cruises in 1950 to 1952 ooooooooooooooooooo S 



Zm Locations of zooplankton stations occupisd by the John Ro 



Ifenning on two cruises in 1951oooo o oo o oooooo ooooooooooo o oooo 4 



3. Con^arison of average zooplankton voluross resulting from day 

 and night horizontal hauls at different depths j cruises 4 

 ^^'^ ^* Hugh Mo Smith o (Nuufcer of samples is indicated aboT«? 



6£LCi1 OXOCK^iooOOOOOOOOOOOoUOOOOOOO OOO oo oo OOoO 0000600000000000 ^ 



4o Zooplankton volumes collected at four stations (two looali= 

 ties) on John Ro Manning cruise 9 comparing localitiesj, 

 s "ca ti ons ^ and uiine ox sampxmg oooooooooooooooooooooooooooooo xu 



5o Zooplankton volumes for a 24-hour series of successive 

 oblique hauls to 200 j, 300 ^ and 500 meters depths from 

 John Ro Manning cruise 9j, station Sooooooooooooooooooooooooo 11 



6o Logarithms of zooplankton volumes collected on John Ro 

 Manning cruise Sj, plotted against hour of hauling to 

 demonstrate the resemblance between variation with time 

 of hauling and the sine curve (figure 7)oooooonooot,ooooooooo 16 



To Graph of the sine curve showing relationship between the 

 sine function and corresponding hour of th© day when the 

 1800 hour is equated to angle whose sine is zeroo o o o ooo oo oo o 1" 



8o Logarithms of zocplankton volumas of John Ro Ma.nr^i-ji.g cruise 

 8, plotted against the sine value eorrs spending to the hour 

 of hauling^ and showing the regression line calculated for 



th© re«ati OnShXpo OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO 19 



9o Zooplankton volumes i, collected on th© north=south section 

 along 158° 25'. Wo longitude on John Ro jfegnisg criiise 8^ 

 before (a) and after (B) adjustment by the sine method to 

 equilibrate for the diurnal variatioKoooo oo o oo oooooooooooo oo 20 



10 Lines of equal zooplankton abundance i, based on time^ad justed 



volumes j, for iiire© cruises of the Hugh Mo Smitho ooooooooooo 29 



lie Chart of the major Hawaiian Islands showing the boundaries 



of the six geographical subdivisions used in comparing areal 

 differences in zooplankton abundanceo oo o o o o oo oo » o o o » o oo oo o o o 31 



