Larvae Information Summary for  Aptocyclus ventricosus
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Main Ref: Matarese, A.C., A.W. Kendall, D.M. Blood and M.V. Vinter 1989
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development planktonic
Larval area British Columbia, 48°30’N-55° N, to Bering Sea, 54-66° N
Yolk-sac       Ref:  
Yolk   Oil globules  
Post larvae
Striking feature  
Striking shape lateral   dorsal  
Striking feature  
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Diagnostic characters: smooth body (lack of spines); distinguished from other cyclopterines by: distribution; meristic characters: total verebrae (27-29); dorsal fin spines (5); dorsal fin rays (8-11); anal fin rays (6-9). Pigment: initially, body is lightly pigmented but with development pigment increases to cover entire body. Sequence of fin development: pectorals and pelvic disc form before hatching.
  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. - 28.02.00
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