FishBase |
Main Ref: | Moser, H.G. and E.H. Ahlstrom 1996 |
max | min | mod | Ref. | |
Length at birth (mm) | 2.9 | |||
Preanal L. % TL | 58 | 50 |
Place of development | planktonic | |||
Larval area | Northeastern Pacific (California Current region); Northwestern Pacific (Japan) | |||
Yolk-sac | Ref: | |||
Yolk | Oil globules | |||
Rows on tail | ||||
Other melanophores on tail |
Striking feature | light organs | |||
Striking shape lateral | normal (not striking) | dorsal | ||
Striking feature | light organs | |||
Shape of gut | elongated | |||
Gas bladder early | late | |||
Spinal armature early | no spines | late | no spines | |
Pigmentation early | ||||
Rows on tail | dorsal + ventral + lateral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Pigmentation late | ||||
Rows on tail | dorsal + ventral + lateral row | |||
Other melanophores on tail | tail with single melanophore | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Urostyle region early | unpigmented | late | unpigmented | |
Peritoneum | with row of melanophores | |||
Pectorals | normal melanophores at fin base | |||
Pelvics | fin rays only without melanophores | |||
Morphology similar to D. atlanticus; lacks barbel but has pigment at tip of lower jaw; lacks large melanophore on trunk above preanal arch of gut that is present in D. atlanticus; Br2 photophores form at about 4.5 mm; PO5 the only other pair to develop in larvae. Pigmentation: Preflexion: by about 3.0 mm, ventrolateral pair just posterior to cleithrum, dorsolateral pair on terminus of gut, 2 pairs on lateral midgut, and 3-5 in postanal median ventral series; at about 4.5 mm, on anterior margin of lower jaw. Flexion: 5-9 in postanal series, becoming embedded. Postflexion: by about 7.0 mm, 10-12 in postanal series, 1 (large) on anterior region on pectoral fin base, pair on isthmus on each side of urohyal region, ventrolateral and dorsolateral pairs on hindbrain, 1 (large) at base of lower caudal fin rays, and beginning of paired series on each side of anal fin base; in larvae >7.7 mm, 1 or 2 more laterally on gut (some specimens); 11-12 in postanal series. Sequence of fin development: caudal, pectorals, anal, dorsal and pelvics. |
max | min | mod | Ref. | |
Total number of vertebrae | 32 | 29 | 31442 |
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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