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Larvae Information Summary for  Strongylura exilis
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Main Ref: Watson, W. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 9.3 6.2    
Preanal L. % TL        
Place of development planktonic
Larval area California Current region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail no rows
Other melanophores on tail tail completely covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Post larvae
Striking feature lower jaw strongly projecting
Striking shape lateral normal (not striking) dorsal  
Striking feature lower jaw strongly projecting
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Pigmentation early
Rows on tail no rows
Other melanophores on tail tail completely covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail tail completely covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent) without melanophores
Larvae nearly completely pigmented; very elongate and slender with long preanal length; lower jaw begins to elongate into beak by end of yolk absorption (about 7-10 mm) and upper jaw begins to elongate by about 16 mm; dorsal fin rays 13-17, anal fin rays 16-19. Pigmentation: Larvae: completely pigmented initially except on branchiostegal membrane, pectoral fin blades, median finfold, and end of gut; decreasing lateral melanistic pigment on trunk after about 27 mm. Sequence of fin development: caudal, dorsal and anal and pectorals, pelvics.
Meristic characters
  max min mod Ref.
Total number of vertebrae 74 67   36575
  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. - 14.11.00
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