UNITED STATES DEPARTMENT OF THE INTERIOR 

 U.S. Fish and Wildlife Service 



BUREAU OF commercial FISHERIES 



Description and Evaluation of Methods for Determining 



Incident Solar Radiation, Submarine Daylight, 



Chlorophyll A, and Primary Production 



Used by Scripps Tuna Oceanography Research Program in the 



Eastern Tropical Pacific 



By 

 ROBERT W. HOLMES 



Contribution fronn the Scripps Institution of Oceanography- 

 University of California, San Diego, La Jolla, Cal. 92037 



United States Fish and Wildlife Service 

 Special Scientific Report--Fisheries No. 564 



Washington, D.C. 

 December 1968 



