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Larvae Information Summary for  Alepisaurus ferox
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Main Ref: Ambrose, D.A. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 5      
Preanal L. % TL 81 37    
Place of development planktonic
Larval area Northeastern Pacific (California Current region); Northwestern Pacific (Japan)
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature teeth clearly visible
Striking shape lateral normal (not striking) dorsal  
Striking feature teeth clearly visible
Shape of gut triangular
Gas bladder   early absent late absent
Spinal armature   early opercular spines only late opercular spines only
Pigmentation early
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head
Pigmentation late
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early unpigmented late unpigmented
Peritoneum with row of melanophores
Pectorals normal with few scattered melanophores
Pelvics fin rays only without melanophores
Distinguished from other species of Alepisaurus by: four preopercular spines; bony ridges on head; pigment patch at anal fin base; peritoneal pigment patches absent; for family: large head and mouth; prominent canines on dentary; small fins; short gut; presence of a translucent space between the gut and hypaxial musculature, prior to completion of the flexion stage. Pigmentation: Preflexion: fine specks on pectoral fins. Flexion: on lower jaw angle. Postflexion: dorsally on head; on gular region, operculum, and peritoneum; patch near anal fin origin; dorsolaterally below adipose fin; midlaterally on trunk. Transformation: spreading dorsally and laterally along dorsum and tail. Sequence of fin development: caudal, pectorals, anal, dorsal, pelvics.
Meristic characters
  max min mod Ref.
Total number of vertebrae 52 47   36025
  L 1st feeding Ref. Months of presence of larvae    Ref. 
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 01.02.00
Modified by: Luna,Susan M. - 29.01.03
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