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Larvae Information Summary for
Cyclothone atraria
| Main Ref: | Watson, W. 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Northeastern Pacific (California Current region); Northwestern Pacific (N Taiwan Strait, Japan) | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
Post larvae
| Striking feature | light organs | |||
| Striking shape lateral | eel-like | dorsal | ||
| Striking feature | light organs | |||
| Shape of gut | tube-like | |||
| Gas bladder early | late | pigmented | ||
| Spinal armature early | no spines | late | no spines | |
| Rows on tail | ventral row | |||
| Other melanophores on tail | one dorso-ventral cluster or band | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Peritoneum | with row of melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | fin rays only without melanophores | |||
| Myoseptal pigment above gut; pigment over notochord and 6-7 predorsal melanophores; 8-9 (usually 9) ceratobranchial gill rakers, present by at least 11.5 mm, probably sooner. Pigmentation: Postflexion: at cleithral symphysis; pair long along sides of gut anteriorly; over gas bladder; 1 over end of hindgut; 10 on myosepta above gut anteriorly; 11 internal, ventrally along tail; external on anal fin ray bases; on parhypural; at center of hypural margin; over notochord, extending anteriorly to 6 melanophores past dorsal fin origin. Transformation: scaterred over dorsal surface of head and upper half of body by 14 mm; along margins of branchiostegal membranes by about 11.5 mm, covering membranes by 14 mm. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 32 | 31 | 35800 | |
| Preanal number of myomeres | 14 | 13 | 35800 |
| 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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