Inter-American Tropical Tuna Commission. 1974. Report 

 of the Inter-American Tropical Tuna Commission for 

 the year 1973. [In Engl, and Span.] Inter-Am. 

 Trop. Tuna Comm., Annu. Rep. 1973, 150 p. 



Using the Southern Oscillation index, about 

 one-half the variation in skipjack abundance 

 could be explained by fluctuations in tem- 

 perature and pressure anomalies. A predic- 

 tion capability was suggested with the best 

 predictor thought to be the change in tem- 

 perature along the equator between long. 180 

 and 130°W. 



KEY WORDS: tuna, yellowfin, skipjack, sea- 

 son, abundance. Southern Oscillation index, 

 temperature, pressure. 



Inter-American Tropical Tuna Commission. 1975. Report 

 of the Inter-American Tropical Tuna Commission for 

 the year 1974. [In Engl, and Span.] Inter-Am. 

 Trop. Tuna Comm., Annu. Rep. 1974, 169 p. 



See annotations for 1973 and 1975 annual 

 reports . 



Inter-American Tropical Tuna Commission. 1976. Report 

 of the Inter-American Tropical Tuna Commission for 

 the year 1975. [In Engl, and Span.] Inter-Am. 

 Trop. Tuna Comm., Annu. Rep. 1975, 176 p. 



The Southern Oscillation index was favored as 

 a predictor of the apparent abundance of part 

 of the skipjack in the eastern tropical Pa- 

 cific fisheries. Correlations ran high, but 

 predictions on abundance often failed. 



KEY WORDS: tuna, skipjack. Southern Oscil- 

 lation index, catch, abundance. 



Inter-American Tropical Tuna Commission. 1977. Report 

 of the Inter-American Tropical Tuna Commission for 

 the year 1976. [In Engl, and Span.] Inter-Am. 

 Trop. Tuna Comm., Annu. Rep. 1976, 180 p. 



Predictions for skipjack catches based on 

 Southern Oscillation index being discontinued 

 due to failures in the prediction. 



KEY WORDS: tuna, skipjack. Southern Oscil- 

 lation index, catch, abundance. 



34 



