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Larvae Information Summary for  Argentina sphyraena
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 7.6 7 7.25 37
Preanal L. % TL 71 72.6 71.8  
Place of development planktonic
Larval area to be filled
Yolk-sac elongated   pigmented Ref: 37
Yolk segmented Oil globules one oil globuleposteriorventralpigmented
Rows on tail no rows
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on trunk
Tail with one dorsal melanophore near the caudal end. Number of preanal myomeres: 36; of postanal: 17-19.
Post larvae
Striking feature none
Striking shape lateral eel-like dorsal normal (not striking)
Striking feature none
Shape of gut tube-like
Gas bladder   early invisible late invisible
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail no rows
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum with row of melanophores
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent)  
Appearence of opercular melanophores. The pigmentation consists of six groups of melanophores along the upper surface of the alimentary canal and on the postanal portion.
Meristic characters
  max min mod Ref.
Total number of myomeres     52 262
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 8   Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Papasissi,Christine - 19.10.90
Modified by: Luna,Susan M. - 27.02.91
Checked by: Giovanardi,Otello - 14.02.91
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