Larvae Information Summary for  Sebastes caurinus
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Main Ref: Moser, H.G. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     5.3 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 dorsal + ventral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Rows on tail lateral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Pectorals normal with rows of melanophores
In preflexion larvae, extensive pigmentation on head and dorsal and ventral margins of tail (series extends entire length of dorsum in contrast to S. auriculatus where it is limited to tail); preopercular spines sparsely pigmented (heavily pigmented in S. auriculatus); postorbital pigment patch in postflexion larvae (none on cheek as in S. auriculatus); single opercular pigment patch in postflexion larvae (S auriculatus larvae have upper and lower opercular patches). Pigmentation: Preflexion: initially, 0-4 above midbrain and 1-5 above hindbrain, 0-1 at otic region, at angular (rarely), at lower jaw tip (some specimens), dorsally and ventrally on gut, 1 anterior to and 1 posterior to anus, at cleithral symphysis (some specimens), 39-63 in series at ventral margin of tail (from postanal myomere 1 to 16), 15-32 in series on dorsum (nape to postanal myomere 16), and 1 laterally on tail (some specimens); by end of stage, laterally on lower jaw, other head loci augmented, some laterally on gut, and on snout. Flexion: few on pectoral fin base and blade; more on jaws and dorsally on head; on midline posteriorly on tail. Postflexion: postorbital patch; patch on opercle; sparse on preopercular spines; gut covered; laterally at cleithrum; more on pectoral fin base and blade; diffuse bar on tail; on margin of hypural. Juvenile: heavy dorsally on head; 3 bars below first dorsal fin; broad bar below second dorsal fin; heavy on margin of first dorsal fin with 2 lighter areas proximally. Sequence of fin development: caudal, dorsal and anal and pectorals, pelvics. Distinguished from S. auriculatus by: until midflexion, more dorsal midline pigment anterior to anus; less pigment in the opercular region (flexion and postflexion). Pigment: head: dorsal and nape spreading, with development, to entire head; gut: dorsal and ventrolateral surface, increasing laterally with development; dorsal midline melanophores extend from head to just anterior to tail with no break over gut; ventral midline melanophores, with development increasing ventrolaterally and in hypural region. Sequence of fin development: caudal and pectorals, pelvics, dorsal and anal. 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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