Larvae Information Summary for  Genypterus blacodes
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Main Ref: Furlani, D.M. 1998
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 2.5      
Preanal L. % TL 49 32    
Place of development  
Larval area Central New South Wales/off Sydney
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature none
Striking shape lateral eel-like dorsal compressed
Striking feature none
Shape of gut spherical or gut loop
Gas bladder   early visible late visible
Spinal armature   early   late  
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 + lateral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum with row of melanophores
Pectorals fin rays only without melanophores
Pelvics fin rays only without melanophores
Diagnostic characters: body elongate in postflexion larvae; snout length typically less than eye diameter; series of melanophores along ventral midline of trunk and tail, single from isthmus to midbody, paired from midbody to caudal peduncle; no melanophores along dorsal midline of trunk and tail; lateral midline pigment on posterior half of tail from 8 mm. Sequence of fin development: caudal (7.8-9.4 mm); anal (7.8-9.9 mm); dorsal (7.8-13.4 mm); pelvic (8.1-11.8 mm); pectoral (10.3-13.4 mm). Angle of lower jaw ventrally pronounced in preflexion larvae. Small teeth along both jaws in preflexion larvae greater than 4.5 mm. Gut moderate, initially straight and with a single coil at midgut from late preflexion stage. Gas bladder over midgut between myomeres 3-7, inflated only in some larvae. Dorsal and anal fin rays develop from posterior to anterior. Larvae have been caught in shelf and slope waters of New South Wales from July to September, and in coastal waters off Sydney from April to August (Ref. 33622).
Meristic characters
  max min mod Ref.
Total number of myomeres 68 60   33847
Preanal number of myomeres 19 12   33847
  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. - 24.04.00
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