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Larvae Information Summary for
Trachipterus fukuzakii
| Main Ref: | Charter, S.R. and H.G. Moser 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 5.6 | 4.8 | ||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | California Current region | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | other | |||
| Striking shape lateral | dorsal | |||
| Striking feature | other | |||
| Shape of gut | ||||
| Gas bladder early | late | |||
| Spinal armature early | late | |||
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Pectorals | normal without melanophores | |||
| Pelvics | fin rays only without melanophores | |||
| Total myomeres 70-86; myomeres in preflexion larvae 29-39+36-52, in flexion stage 39-50+28-37, in postflexion-transformation stage 49-53+30-31, and in pelagic juveniles 43-44+31-33; gut elongate; dorsal pigmentation; lack of ventral pigmentation; low myomere count; by 13.3 mm, ventral profile tapers more steeply than in T. altivelis and postanal region of body is strap-like. Transformation occurs in protracted and gradual stages. Pigmentation: Preflexion-flexion: anteriorly on gut; dorsally on myosepta; some have snout pigment; by 8.8 mm, on forehead and between eye and cleithrum; on dorsal pterygiophores; dorsolaterally on gut. Postflexion-transformation: on caudal peduncle; by 83.4 mm, on lips and posteriorly on eye socket. Juvenile: on lower jaw angle; on ventral body edge below cleithrum; 2-3 patches laterally on body. Sequence of fin development: dorsal and pelvics, caudal, pectorals. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 86 | 70 | 36610 |
| 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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