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Larvae Information Summary for  Sprattus sprattus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 3.7 2.55 3  
Preanal L. % TL 85 80 84 37
Place of development planktonic
Larval area to be filled
Yolk-sac ovoid   unpigmented Ref:  
Yolk segmented Oil globules no oil globule
Rows on tail no rows
Other melanophores on tail tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Scattered small melanophores on the head and dorsal region.
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature none
Shape of gut tube-like
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 tail with single melanophore
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail 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)  
At 10-11 mm: dorsal originates on 28th myomere (in pilchard on myomere 31). At 15-16 mm: caudal not yet emarginate ( in pilchard emarginate). At 18 mm: pelvic fins behind pylorous (in pilchard at level of pylorous).
Meristic characters
  max min mod Ref.
Total number of myomeres 48 46 47 257
  L 1st feeding Ref. Months of presence of larvae
max 6 37 Jan Feb Mar Apr
min 4.5 37 May Jun Jul Aug
mod 5 37 Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Papasissi,Christine - 19.10.90
Modified by: Luna,Susan M. - 28.02.91
Checked by: Giovanardi,Otello - 15.02.91
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