These investigations are part of the California Cooperative Oceanic 

 Fisheries Investit'ations, a program sponsored by the Marine Research Gommittee 

 and carried out by the Scripps Institution of Oceanography of the University of 

 California, the Bxireau of Marine Fisheries of the California Department of Fish 

 and Game, the California Academy of Sciences, the Hopkins Marine Station of 

 Stanford University and the South Pacific Fishery Investigations of the Fish 

 and Wildlife Service. 



It is vdth deep pleasure that the author acknowledges the cooperation 

 given by the Scripps Institution of Oceanography in the collection of data at 

 sea. All personnel of the South Pacific Fishery Investigations contributed to 

 this project — many devoting their full time to ito 



The earlier publications in this series are the following: 



STAFF, SOUTH PACIFIC FISHERY INVESTIGATIONS 



1952 Zooplankton volumes off the Pacific coast, 1951, U. S. Dept. 

 Interior, Fish and Wildlife Service, Spec. Sci, Kept — Fisheries 

 No. 73, 37 pp. 



1953 Zooplankton voliunes off the Pacific coast, 1952. U. S. Dept. 

 Interior, Fish and Wildlife Service, Spec. Sci. Repb — Fisheries 

 No. 100, 41 pp. 



1954 Zooplankton volumes off the Pacific coast, 1949-50. U. S. 

 Dept. Interior, Fish and Wildlife Service, Spec. Sci. Rept — 

 Fisheries No. 125, 54 pp. 



1954 Zooplankton volumes off the Pacific coast, 1953. U. S. Dept. 

 Interior, Fish and Wildlife Service, Spec. Sci. Rept — Fisheries 

 No. 132, 38 pp. 



1955 Zooplankton volumes off tlB Pacific coast, 1954. U. S. Dept, 

 Interior, Fish and Wildlife Service, Spec. Sci. Rept — ^Fisheries 

 No. 161, 35 pp. 



1956 Zooplankton volxmies off the Pacific coast, 1955. U. S. Dept. 

 Interior, Fish and Wildlife Service, Spec. Sci. Rept — Fisheries 

 No. 177, 31 pp. 



THRAILKIIL, JAMES R. 



1956 Relative Areal Zooplankton Abundance off the Pacific coast, 

 U. S. Dept. Interior, Fish and V/ildlife Service, Spec. Sci, 

 Rept — ^Fisheries, No, 188, 85 pp. 



