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Larvae Information Summary for  Trachurus trachurus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 2.5 1.8 2.2  
Preanal L. % TL 57 56 56.5  
Place of development planktonic
Larval area to be filled
Yolk-sac ovoid   unpigmented Ref:  
Yolk segmented Oil globules one oil globuleanteriorcentralpigmented
Rows on tail dorsal + ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on trunk
Anterior edge of yolk-sac slightly beyond the anterior point of head. Anus well behind the yolk-sac.
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature none
Shape of gut triangular
Gas bladder   early pigmented late pigmented
Spinal armature   early opercular spines only late opercular spines only
Pigmentation early
Rows on tail dorsal + lateral + ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + lateral + ventral row
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum covered with melanophores
Pectorals normal  
Pelvics normal (i.e. small or absent)  
In larvae 4 mm long: 4-5 opercular spines on the outer row and about 5 on the inner row, becoming more in the later postlarvae. Numerous melanophores on lower jaw, along abdomen and on head and upper surface of stomach.
Meristic characters
  max min mod Ref.
Total number of vertebrae     24 65
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 3.24   Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Papasissi,Christine - 19.10.90
Modified by: Luna,Susan M. - 28.02.91
Checked by: Giovanardi,Otello - 15.02.91
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