| FishBase |
Larvae Information Summary for
Cyclothone signata
| Main Ref: | Watson, W. 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 2.4 | |||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | California Current region | |||
| Yolk-sac | elongated | Ref: | ||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | light organs | |||
| Striking shape lateral | eel-like | dorsal | ||
| Striking feature | light organs | |||
| Shape of gut | tube-like | |||
| Gas bladder early | pigmented | late | pigmented | |
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on trunk | |||
| Pigmentation late | ||||
| Rows on tail | ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | fin rays only without melanophores | |||
| No myoseptal pigment above gut; no pigment over notochord until end of postflexion stage; first 1-3 (usually 2) postanal myomeres unpigmented; usually a gap in middle of ventral tail series; eyes usually distinctly oval. Pigmentation: Preflexion-flexion: 2-4 pairs along gut; over gas bladder (>4.5 mm), 5-10 (usually 6) on ventral margin of tail beginning at postanal myomere 3-5, usually a gap in middle of series (gap present in 75%); 1 under notochord tip, becomes situated along parhypural. Postflexion-transformation: gut pairs increase to 6-8; tail series increases to 7-12 beginning at postanal myomere 2-4 (usually 3), gap present in 50%; double row along middle of anal fin base (greater than about 8 mm); under hindbrain (>10.5 mm); over vertebral column, beginning posteriorly (>11.5 mm); on stomach (> or = 12.5 mm). Sequence of fin development: caudal, anal, dorsal, pelvics, pectorals. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 30 | 32 | 35800 | |
| Preanal number of myomeres | 13 | 15 | 35800 |
| 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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