Larvae Information Summary for  Sebastes jordani
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Main Ref: Moser, H.G. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     5.4 36715
Preanal L. % TL        
Place of development planktonic
Larval area California Current region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature duck-billed shape of head
Striking shape lateral normal (not striking) dorsal  
Striking feature duck-billed shape of head
Shape of gut triangular
Gas bladder   early   late  
Spinal armature   early several different spines late several different spines
Pigmentation early
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Rows on tail no rows
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pectorals normal without melanophores
Pelvics normal (i.e. small or absent) without melanophores
Most slender Sebastes species (body depth <25% SL); large larvae (5.4 mm SL at hatching, 8-10 mm SL at flexion); relatively shortest preanal distance in the genus (wide space between anus and anal fin); position of dorsal midline series and number of constituent melanophores; relatively short pectoral fins, usually lacking pigment; high pectoral fin ray count; relatively large size at hatching, flexion, and transformation stages; head spines inconspicuous after flexion stage. Pigmentation: Preflexion: initially, dorsolaterally on gut, patch over brain, 21-24 in postanal ventral series (from 3rd-5th to 14th-16th postanal myomere), 13-28 in dorsal midline series (from 7th-12th to 14th-16th postanal myomere); by end of stage, embedded above beginning to expand anteriad. Postflexion: by 13.0 mm, on snout near upper jaw and beginning of patch on upper opercular region; by 15.0 mm, on lateral hypural region; by 20.0 mm, continuous on dorsum, beginning to form on epaxial region of body; on lower jaw; more on snout; on posterior hypural margin. Transformation: entire epaxial region covered, heavier at dorsum and at myosepta. Sequence of fin development: pectorals, caudal, dorsal and anal and pelvics. Also Ref. 34817.
  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. - 21.02.00
Modified by: Luna,Susan M. - 13.03.01
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