YOSHIDA: EARLY LIFE HISTORY OF SKIPJACK TUNA 



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STANDARD LENGTH (CM ) 



STANDARD LENGTH (CM ) 



STANDARD LENGTH I CM ) 



Figure 6. — Monthly length-frequency distribution of skipjack tuna from Hawaii. 



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1963 1964 1965 



Figure 7. — Growth of juvenile skipjack tuna from Hawaii. 



alanffy growth function to estimate skipjack 

 tuna growth. He indicated that skipjack tuna 

 between 44 and 72 cm grew about 16.6 cm per 

 year or 1.4 cm per month. The deceleration in 



tuna between 9 and 40 cm to 1.4 cm per month 



for fish between 44 and 72 cm is to be expected. 



It is useful to determine the growth rate of 



skipjack tuna from hatching to 9 cm SL. These 



growth from 2.0 cm per month for skipjack and other data may make it possible to estimate 



551 



