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Larvae Information Summary for  Chirolophis ascanii
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     10  
Preanal L. % TL     40  
Place of development planktonic
Larval area to be filled
Yolk-sac other   unpigmented Ref:  
Yolk unsegmented Oil globules one oil globuleanteriorventralunpigmented
Rows on tail dorsal + ventral row
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Yolk sac rounded. Anus is about 1.25 mm behind the end of the yolk sac (TL 10 mm). A row of internal notochordal melanophores from head to tail.
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature none
Shape of gut elongated
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 tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + 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 with row of melanophores
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent)  
Lateral row of melanophores only in posterior part of tail. There are some melanophores on the head.
  L 1st feeding Ref. Months of presence of larvae
max 14   Jan Feb Mar Apr
min 13   May Jun Jul Aug
mod 13.5   Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Froese,Rainer - 19.10.90
Modified by: Luna,Susan M. - 11.08.93
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