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Larvae Information Summary for
Alepisaurus ferox
| Main Ref: | Ambrose, D.A. 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 5 | |||
| Preanal L. % TL | 81 | 37 |
| 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 | ||||
Post larvae
| Striking feature | teeth clearly visible | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | teeth clearly visible | |||
| Shape of gut | triangular | |||
| Gas bladder early | absent | late | absent | |
| Spinal armature early | opercular spines only | late | opercular spines only | |
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head | |||
| Pigmentation late | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal with few scattered melanophores | |||
| Pelvics | fin rays only without melanophores | |||
| Distinguished from other species of Alepisaurus by: four preopercular spines; bony ridges on head; pigment patch at anal fin base; peritoneal pigment patches absent; for family: large head and mouth; prominent canines on dentary; small fins; short gut; presence of a translucent space between the gut and hypaxial musculature, prior to completion of the flexion stage. Pigmentation: Preflexion: fine specks on pectoral fins. Flexion: on lower jaw angle. Postflexion: dorsally on head; on gular region, operculum, and peritoneum; patch near anal fin origin; dorsolaterally below adipose fin; midlaterally on trunk. Transformation: spreading dorsally and laterally along dorsum and tail. Sequence of fin development: caudal, pectorals, anal, dorsal, pelvics. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 52 | 47 | 36025 |
| L 1st feeding | Ref. |
Months of presence of larvae
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| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |
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