Larvae Information Summary for
Icichthys lockingtoni
| Main Ref: | Matarese, A.C., A.W. Kendall, D.M. Blood and M.V. Vinter 1989 | |||
Yolk-sac larvae
| min | max | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Eastern Pacific (south of southern California to Gulf of Alaska, 54-60° N); Northwestern Pacific (Japan) | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | none | |||
| 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 | no rows | |||
| Other melanophores on tail | tail completely covered with melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Peritoneum | with row of melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| Distinguished from Tetragonurus cuvieri by: high myomere count (56-62); preflexion: dorsal body pigment over posterior half of body; only tail in T. cuvieri; flexion: no preopercular spines; postflexion: dorsal and anal spines weak, few (three) dorsal spines; more dorsal and anal fin rays than in T. cuvieri. Pigment: dorsal and ventral body midline pigment; lateral line dashes develop during flexion; head and tail pigment increases with development; become heavily, uniformly pigmented including fin membranes. Sequence of fin development: caudal, 2nd dorsal (rays), anal, pectorals, 1st dorsal (spines), pelvics. | ||||
| L 1st feeding | Ref. | Months of presence of larvae < >Ref. | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |