FishBase
Larvae Information Summary for  Macroramphosus gracilis
( not available )

Main Ref: Watson, W. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     2.5 36711
Preanal L. % TL        
Place of development planktonic
Larval area California Current region
Yolk-sac     pigmented Ref:  
Yolk   Oil globules  
Rows on tail ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation: heavy on dorsum from myomere 8-9 to 20-21; series beginning under forebrain, continuing above gut and along ventral margin of tail to myomere 21-22; few on yolk-sac; few along lower margins of gill covers.
Post larvae
Striking feature duck-billed shape of head
Striking shape lateral normal (not striking) dorsal  
Striking feature duck-billed shape of head
Shape of gut elongated
Gas bladder   early   late  
Spinal armature   early several different spines late several different spines
Pigmentation early
Rows on tail lateral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Rows on tail lateral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent) without melanophores
Myomeres 10-12+14-16=24-26; body becomes covered with spinules, beginning along lateral midline of tail in yolk-sac or early preflexion stage, extending forward to pterotic by 3.6 mm, abdominal series added by 4.2 mm; numerous ridges form on cranium. Pigmentation: Preflexion-postflexion: spreading forward on dorsum to midbrain by 3.2 mm and to tip of snout by 3.6 mm; spreading laterally from dorsum beginning in middle of tail by 3.3 mm; stripe along lateral midline at postanal myomeres 1-10; body becoming completely pigmented by 3.6-4.2 mm, except none on last 2-3 myomeres or ventrally on posterior part of gut or on fin membranes. Transformation: completely pigmented except on pelvic and pectoral fins, second dorsal fin, anal fin, and caudal fin; darker dorsally; stripe along lateral midline of tail remains visible through about 10 mm. Sequence of fin development: caudal, pectorals, dorsal, anal, pelvics.
Meristic characters
  max min mod Ref.
Total number of myomeres 26 24   36711
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 04.12.00
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