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Larvae Information Summary for  Myoxocephalus scorpius
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 8.6 7.4 8  
Preanal L. % TL 40.1 38.7 39.4  
Place of development planktonic
Larval area to be filled
Yolk-sac ovoid     Ref:  
Yolk unsegmented Oil globules one oil globuleanteriorcentralpigmented
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Presence of 12-14 melanophores on the ventral postanal row, several on the head, snout and at the base of the pectoral fin and a row of melanophores on the shoulder.
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 several different spines late several different spines
Pigmentation early
Rows on tail ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late unpigmented
Peritoneum covered with melanophores
Pectorals normal  
Pelvics normal (i.e. small or absent)  
The head spinal armature during the postlarval development consists of 2 otocystic spines, 4-5 preopercular spines, 1 spine on the snout, and 1 over the eye.
  L 1st feeding Ref. Months of presence of larvae
max 10 41 Jan Feb Mar Apr
min 7.5 37 May Jun Jul Aug
mod 8.7   Sep Oct Nov Dec
Water parameters     Metric characters
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