Johnson (1961). Injection temperatures used 

 here were not thoroughly edited, and the data 

 presented should be considered a first approxi- 

 mation for early use. The Bureau of Com- 

 mercial Fisheries Biological Laboratory, 

 Stanford, will publish critically edited data in 

 the future for broader regions of the Pacific 

 Ocean. The mean monthly number of injection 

 temperature observations by 2-degree squares 

 of latitude and longitude computed from the 

 pooled 12 years of data and is shown in 

 figure 1. Squares with fewer than two observa- 

 tions are not shown. 



Coastal sea temperatures at La Libertad, 

 Ecuador, for the 12-year period, and tem- 

 peratures at Puerto Chicama, Peru, for 1957 

 and 1958, were obtained through the courtesy 



of the Inter-American Tropical Tuna Com- 

 mission. Temperatures for 1947 through 1956 

 at Puerto Chicama were extracted from a 

 report by Rodewald (1958). Temperatures at 

 Talara, Peru, for 1947 through 1955 were 

 taken from the U. S. Department of Commerce, 

 Coast and Geodetic Survey, Special Publication 

 No. 280 (1956), and temperatures for 1956 

 through 1958 were obtained by direct com- 

 munication with that Department. 



The locations of these stations are; 



Station 



La Libertad, Ecuador 



Talara, Peru 



Puerto Chicama, Peru 



Latitude Longitude 



02O13' 

 04O35* 

 07°42' 



80O55* W. 

 81Q17' W. 

 70°27' W. 



Figure l.--Mean monthly number of injection temperature observations by 2-degree 

 squares. Circled areas 1 to 5 denote squares chosen for variability analysis of the 

 source data. 



