FISHERY BULLETIN: VOL. 70, NO. 1 



3.6 mm 



6.6mm 



9.6mm 



4 4mm 



5.3 mm 



6.1mm 



Figure 5. — Larval stages of Thunnus thynnus, I. (From 

 Yabe, Ueyanagi, and Watanabe, 1966. Lengths have 

 been converted from total to standard.) 



(see Figures 5 and 6), and that there was no 

 difference in T. thynnus from the Atlantic and 

 Pacific Oceans. 



5. The identification of T. tonggol was not 

 substantiated by an adequate size series. 



6. The description of T. maccoyii, based on 

 tiny melanophores on the dorsal edge of the 

 trunk, was not conclusive. 



7. The description of T. ohesus by Matsumoto 

 (1962) was correct, though it needed to be aug- 

 mented by illustrations of a complete size series. 



12.2 mm 



16.8mm 



Figure 6. — Larval stages of Thunnus thynnus, IL (From 

 Yabe, Ueyanagi, and Watanabe, 1966. Lengths have 

 been converted from total to standard.) 



8. The identity of T. atlanticus larvae is un- 

 resolved. 



IDENTIFICATION OF JUVENILES 



In spite of the intention of the workshop to 

 assemble as many specimens of juvenile tunas 

 as possible, only a few juveniles of T. albacares 

 and T. ohesus, not nearly enough to warrant 

 their detailed examination, were available for 

 study. The discussion on juvenile tuna identifi- 

 cation, therefore, dealt mainly with published 

 reports and with contributed data, resulting in 

 a summary of identifying characters which the 

 workshop considered useful and reliable. 



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