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Larvae Information Summary for  Naucrates ductor
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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     pigmented Ref:  
Yolk   Oil globules one oil globulepigmented
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature other
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature other
Shape of gut triangular
Gas bladder   early   late  
Spinal armature   early several different spines late several different spines
Pigmentation early
Rows on tail dorsal + ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + lateral + ventral row
Other melanophores on tail tail partly covered with melanophores
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)  
At 6 mm pre- and opercular, occipital and orbitalspines. Definitive number of finrays at 8mm: D 3-4/27; A 2/16-17; C17. Body heavily pigmented.
  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. - 20.03.03
Checked by: Giovanardi,Otello - 19.02.91 		Back to Search
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