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Larvae Information Summary for  Scomber scombrus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 3.9 2.46    
Preanal L. % TL 51.8 35.4 41.1 37
Place of development planktonic
Larval area Northeastern Atlantic (British coasts); Northwestern Atlantic (Delaware Bay)
Yolk-sac elongated   unpigmented Ref: 37
Yolk unsegmented Oil globules one oil globuleposteriorventralpigmented
Rows on tail dorsal + ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
A group of melanophores on the head. Peritoneal black pigment occurs on the upper half of the abdomen. Vent opens at the margin of the finfold.
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal tadpole-like
Striking feature none
Shape of gut triangular
Gas bladder   early invisible late invisible
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail dorsal + 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 without melanophores
Pelvics normal (i.e. small or absent)  
At 6 mm, yolk-sac is absorbed, sharp teeth on upper and low jaws. A flask-shaped form of the stomach and rectum is present. Pigmentation: a group of melanophores on the head. Ventral and dorsal melanophores start a definite distance behind the anus. Sequence of fin development: caudal (6 mm); second dorsal (9 mm); anal (9 mm); first dorsal (12-15 mm); finlets (22)
Meristic characters
  max min mod Ref.
Total number of vertebrae     31 65
  L 1st feeding Ref. Months of presence of larvae    Ref. 
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 4.5   Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Papasissi,Christine - 19.10.90
Modified by: Luna,Susan M. - 18.01.02
Checked by: Giovanardi,Otello - 14.02.91
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