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Larvae Information Summary for  Raniceps raninus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 2.9 2.26 2.58  
Preanal L. % TL     37.3  
Place of development planktonic
Larval area to be filled
Yolk-sac elongated   pigmented Ref:  
Yolk unsegmented Oil globules one oil globuleposteriorventralpigmented
Rows on tail no rows
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
There is a patch of yellow and black pigment on the primordial fin just above the pectoral fin. No pigment at the posterior end of the tail.
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 no rows
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early unpigmented late unpigmented
Peritoneum covered with melanophores
Pectorals normal  
Pelvics with elongated fin rays with melanophores
The pelvic fins each has 6 rays and the membrane between them is heavily pigmented with black cells which extends halfway along the body down behind the anus. There are melanophores on the head and on the jaw.
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 2.98   Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Froese,Rainer - 19.10.90
Modified by: Luna,Susan M. - 28.02.91
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