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Larvae Information Summary for  Melanogrammus aeglefinus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 4.99 3.08    
Preanal L. % TL     36  
Place of development planktonic
Larval area Northeastern Atlantic (British coasts); Northwestern Atlantic (Delaware Bay)
Yolk-sac ovoid   unpigmented Ref:  
Yolk unsegmented Oil globules no oil globule
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Presence of melanophores in the shoulder region from just behind the head to a little beyond the beginning of the intestine. Peritoneum is pigmented. Ventral row of melanophores from vent to tip of tail. Vent opens laterally at the base of the finfold.
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 invisible late invisible
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum covered with melanophores
Pectorals normal with few scattered melanophores
Pelvics normal (i.e. small or absent) with melanophores
Yolk-sac is absorbed at about 5.5 mm. At about 30-40 mm, young begin to assume shape. Distinguished from M. merlangus for the early postlarvae by the absence of preanal ventral pigment; early development of pelvic fins; early development of pigment on unpaired fins, on pectoral and pelvic fins. Pigmentation: Prolarval pigmentation persists until about 8-10 mm when pigmentation becomes more diffuse and relatively pale. Sequence of fin development: Dorsal and anal fins complete at 16-20 mm.
Meristic characters
  max min mod Ref.
Total number of vertebrae 22 19 20 39467
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 5.5   Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Froese,Rainer - 19.10.90
Modified by: Luna,Susan M. - 25.01.02
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