FishBase |
Main Ref: | Ambrose, D.A. 1996 |
max | min | mod | Ref. | |
Length at birth (mm) | ||||
Preanal L. % TL | 62 | 25 |
Place of development | planktonic | |||
Larval area | California Current region | |||
Yolk-sac | Ref: | |||
Yolk | Oil globules | |||
Rows on tail | ||||
Other melanophores on tail |
Striking feature | duck-billed shape of head | |||
Striking shape lateral | normal (not striking) | dorsal | ||
Striking feature | duck-billed shape of head | |||
Shape of gut | elongated | |||
Gas bladder early | absent | late | absent | |
Spinal armature early | no spines | late | no spines | |
Pigmentation early | ||||
Rows on tail | no rows | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Pigmentation late | ||||
Rows on tail | ventral + lateral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Urostyle region early | unpigmented | late | pigmented | |
Peritoneum | with row of melanophores | |||
Pectorals | normal without melanophores | |||
Pelvics | fin rays only without melanophores | |||
In preflexion-flexion larvae, pigment absent from dorsal body margin and caudal finfold, embedded pigment behind eye, and pigment rows above and below notochord in caudal peduncle; at postflexion stage, pigment row along tail margin between anus and anal fin and crescent-shaped row of pigment between fore- and midbrain; in transformation-juvenile specimens, 11-12 peritoneal pigment patches, ventral half of caudal fin more heavily pigmented than dorsal half, and anus under dorsal fin. Pigmentation: Preflexion: on lip; internal behind eye; along ventral body margin where anal fin will develop; peritoneal patches increase from 1 to 4. Flexion-postflexion: crescent-like row between fore- and midbrain dorsally; infraorbital row; posterior to lower jaw; row along notochord and along the ventral body margin in the caudal peduncle region; peritoneal patches increase to 4-12. Transformation-juvenile: on snout, isthmus; over cranium; at base of dorsal fin, ventral lobe of caudal fin; gradually extending along dorsum; 11-12 peritoneal patches. Sequence of fin development: caudal and anal, dorsal, pectorals, pelvics, adipose. |
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 |
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