CALANOID COPEPODS FROM EQUATORIAL WATERS 

 OF THE PACIFIC OCEAN 



By George D. Grice, Woods Hole Oceanographic Institution ' 



The present paper concerns the calanoid 

 copepods found in plankton samples collected 

 along the equator, an area which has been rela- 

 tively unexplored taxonomically. 



Systematic studies on calanoid copepods have 

 made these microcrustaceans one of the better 

 known groups of the holoplankton of the Pa- 

 cific Ocean. Extensive taxonomic reports are 

 available for the north Pacific (Brodsky, 1950), 

 the northeast Pacific (Davis, 1949), the west- 

 ern Pacific (Vervoort, 1946; Tanaka, 1953), 

 and the Pacific sector of the Antarctic (Ver- 

 voort, 1957). In addition there are numerous 

 smaller but nevertheless valuable papers con- 

 cerning the calanoid copepods of more re- 



^ Woods Hole, Mass. 



Fishery Bulletin 186. Approved for publication July 21, 1960. 



stricted areas. Although there remain large, 

 unexplored areas, these recent papers and cer- 

 tain of the older ones (e.g., Scott, 1909) pro- 

 vide a framework for a zoogeographic study 

 of Pacific calanoids and, moreover, show where 

 additional investigations are needed. 



Most of the laboratory work of this study was 

 done in Honolulu, Hawaii, in 1958 and 1959 

 under a fellowship from the John Simon Gug- 

 genheim Memorial Foundation. I wish to ex- 

 press my appreciation to the Foundation for 

 the opportunity to make this study. The U.S. 

 Fish and Wildlife Biological Laboratory furn- 

 ished space for the work, the use of their 

 library facilities and a part of their exten- 

 sive plankton collections. It is a pleasure to 

 acknowledge the cooperation of Thomas S. Aus- 



130° 140° 150° 160° 170° 180° 170° 160° 150° 140° 130° 120° 110° 100° 



Figure 1. Positions where plankton samples were obtained. 



171 



