woo 



33°30 



33°00 



32°30 



32°00' 



34W 



33»30 



33°00 



sy-so 



II8''30' 



I7°00 



32'00 



1 18°30 



I I8°0tf 



1 1 7°30' 



II7°00' 



Figure 2. — Catch distribution of striped marlin landed at 

 San Diego, California; August, September, and October 

 1963 through 1967. 



and lat. 33°00' N, long. 117°50' W, and the coast 

 from near Del Mar, California, to Rosarita Beach, 

 Baja California, Mexico. This area accounted for 

 76.4% of all fish landed in these months at the San 

 Diego Marlin Club. 



CATCH AND 

 TEMPERATURE RELATIONSHIP 



Since August 1963, the National Marine 

 Fisheries Service, Tiburon Coastal Fisheries Re- 

 search Laboratory, Tiburon, California, has con- 

 ducted once each month sea surface temperature 

 survey flights off southern California in cooperation 

 with the U.S. Coast Guard. These surveys are 

 conducted from an aircraft using an infrared radia- 

 tion thermometer (ART) to measure sea surface 

 temperatures (Squire, 1972), and data are published 

 in the form of isotherm charts. Comparison of 146 

 simultaneous sea surface temperature observations 

 between the airborne instrument and a sea surface 

 bucket cast showed an average difference of 0.35° F 

 (0.2° C) (ART lower), a range of - 1 .9° F ( 1 . 1° C) to 

 1.2° F (0.7°C), and a standard deviation of 0.65° F 



Figure 3. — Catch distribution for August 1963 through 

 1967. 



33°00 



32°00 



II8°30 



1 18°00 



II7°30 



Figure 4. — Catch distribution for September 1963 

 through 1967. 



190 



