CONTENTS 



Page 



Introduction 1 



Materials and methods 1 



Gear 1 



Sampling program 2 



Treatment of samples 2 



Adjustment for diel variation 3 



Determinations and corrections for depth 3 



Comprehensive series 4 



Vertical distribution 4 



Horizontal distribution 5 



Seasonal distribution 7 



Variations in composition 8 



Diel variation 13 



Phytoplankton bloom 14 



Monitor series 14 



Monthly variations 14 



Comparisons of plankton in windward and leeward samples 15 



Inshore-offshore series 15 



Oblique hauls at to 200 m 16 



Summary 16 



Acknowledgments 20 



Literature cited 20 



Appendix tables 21 



FIGURES 



1. stations tor collecting zooplankton on CHG-24 



2. Stations for collecting zooplankton for comprehensive series. The 

 division between windward and leeward stations is shown by a dotted 

 line 



3. Density of zooplankton around Oahu, November 14-18, 1955 (CHG-24, 

 odd-numbered stations). 



4. Density of zooplankton around Oahu, February 2-7, 1956 (HMS-32, 

 upper net) 6 



5. Density of zooplankton around Oahu, May 7-11, 1956 (HMS-34, upper 



net) 7 



6. Density of zooplankton around Oahu, August 1-6, 1956 (HMS-35, upper 



net) 7 



7. Density of zooplankton around Oahu, November 7-10, 1956 (HMS-36, 

 upper net) 7 



Average number of polychaetes, ostracods, and euphausiids per 

 1,000 m. of water strained by the three nets on HMS-32 and 34 



-13 



9. Average number of amphipods, pteropods, and fish larvae per 

 1,000 m."^ of water strained by the three nets on HMS-32 and 34 14 



10. Average number of calanoid and noncalanoid copepods per 1,000 m."^ 



of water strained by the three nets on HMS-32 and 34 15 



11. Average number of Pleuromamma , Neocalanus , and Candacia per 

 1,000 m."' of water strained by the three nets on HMS-34 16 



12. Average number of Undinula . Euchaeta , and Haloptilus per 1,000 m."^ 



of water strained by the three nets on HMS-34 17 



