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Larvae Information Summary for  Helicolenus dactylopterus
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Main Ref: Halbeisen, H.-W. 1988
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     2.44  
Preanal L. % TL     51.7 60
Place of development planktonic
Larval area Northeast Atlantic
Yolk-sac elongated   pigmented Ref: 60
Yolk   Oil globules one oil globuleposteriorventral
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
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 invisible late invisible
Spinal armature   early no spines late several different 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 unpigmented late unpigmented
Peritoneum covered with melanophores
Pectorals normal with few scattered melanophores
Pelvics normal (i.e. small or absent)  
Few melanophores in the postanal ventral contour in early larvae. Early larvae are enclosed in a jelly matrix. At 5 mm length the characteristic spinal armature begins to develop.
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 3.6 37 Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Froese,Rainer - 19.10.90
Modified by: Luna,Susan M. - 14.06.02
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