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Larvae Information Summary for  Euthynnus affinis
( not available )

Main Ref: Bertolini, F., U. D'Ancona, E. Padoa Montalenti, S. Ranzi, L. Sanzo, A. Sparta, E. Tortonese and M. Vialli 1956
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development planktonic
Larval area Northwestern Pacific (Japan)
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail dorsal + ventral row
More melanophores than in the others Thunnidae.
Post larvae
Striking feature teeth clearly visible
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature teeth clearly visible
Shape of gut triangular
Gas bladder   early   late  
Spinal armature   early several different spines late several different spines
Rows on tail no rows
Melanophores on head + trunk melanophores on head + trunk
Rows on tail ventral row
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early unpigmented late unpigmented
Peritoneum covered with melanophores
Pectorals normal  
Pelvics normal (i.e. small or absent)  
Meristic characters
  max min mod Ref.
Total number of vertebrae     39  
Preanal number of vertebrae     20  
  L 1st feeding Ref. Months of presence of larvae    Ref. 
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Papasissi,Christine - 29.10.90
Modified by: Luna,Susan M. - 08.04.03
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