Davidoff, E.B. 1963. Size and year class composition 

 of catch, age, and growth of yellowfin tuna in the 

 eastern tropical Pacific Ocean. 1951-1961. 



Inter-Am. Trop. Tuna Comm. Bull. 8:201-250. 



Compared surface water temperature data and 

 yellowfin tuna year class growth rates; no 

 relationship was shown. Differences in 



growth rates of individual year classes were 

 attributed to environmental factors other 

 than temperature. 



KEY WORDS: tuna, yellowfin, temperature, 



environment, growth. 



Davidoff, E.B. 1969. Variations in year class 

 strength and estimates of the catchability coeffi- 

 cient of yellowfin tuna in the eastern Pacific 

 Ocean. Inter-Am. Trop. Tuna Comm. Bull. 14:1-44. 



Yellowfin catchability varied with age and 

 time; age 2 most vulnerable to fishing, than 

 age 3 and age 1. Influence of sea surface 

 temperature on year class strength showed no 

 correlation . 



KEY WORDS: tuna, yellowfin, age, tempera- 

 ture, catch. 



deBuen, F. 1955. Notas sobre un viaje de estudios de 

 oceanografia aplicada en el extreme norte de la 

 costa chilena. [In Span.] Bol. Cient. Cia. Adm. 

 Guano 2:25-39. 



[Not read.] Off Chile, blue waters contain 

 tunas, billfishes, etc.; coastal waters do 

 not. The latter contain anchovies, mackerel, 

 etc . 



KEY WORDS: tunas, billfishes, water color, 

 temperature . 



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