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Larvae Information Summary for  Anchoa hepsetus
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Main Ref: Fahay, M. 1983
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 4 3.6    
Preanal L. % TL        
Place of development planktonic
Larval area Mid-Atlantic Bight; Delaware Bay (USA)
Yolk-sac elongated   unpigmented Ref:  
Yolk   Oil globules no oil globule
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk no melanophores on head or trunk
Yolk tapers posteriorly. Anus behind beginning of posterior 1/4 of body at hatching; fins lacking; body transparent (Ref. 40860).
Post larvae
Striking feature duck-billed shape of head
Striking shape lateral eel-like dorsal  
Striking feature duck-billed shape of head
Shape of gut tube-like
Gas bladder   early   late  
Spinal armature   early   late  
Rows on tail no rows
Other melanophores on tail no other melanophores
Rows on tail no rows
Other melanophores on tail no other melanophores
Urostyle region   early unpigmented late unpigmented
Peritoneum without melanophores
Pectorals normal  
Pelvics normal (i.e. small or absent)  
Body long and slender, with vent under dorsal fin; mouth large, terminal, extends to middle of eye; becomes subterminal; gut with muscle-band striations posteriorly; little pigment; overlapping dorsal and anal fins. Anal fin origin under posterior insertion of dorsal fin. At 10.0 mm, chromatophores on chest and ventrally from anal base to caudal (Ref. 40860). Sequence of fin formation: caudal; dorsal and anal; pectoral; pelvic.
Meristic characters
  max min mod Ref.
Total number of myomeres 44 40   68
  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. - 08.08.00
Modified by: Luna,Susan M. - 13.12.01
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