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Larvae Information Summary for
Scopelogadus bispinosus
| Main Ref: | Sandknop, E.M. and W. Watson 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 1.8 | 36655 | ||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | California Current region | |||
| Yolk-sac | elongated pigmented | Ref: | ||
| Yolk | Oil globules | |||
| Rows on tail | ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on trunk | |||
| Pigmentation: anterodorsally on yolk sac, extending onto cleithra in some; dorsally on intestine posteriorly, extending onto trunk in vicinity of myomeres 2-6; ventral or ventrolateral patch in vicinity of postanal myomeres 5-15. | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | none | |||
| Shape of gut | triangular | |||
| Gas bladder early | late | |||
| Spinal armature early | late | |||
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | one dorso-ventral cluster or band | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Rows on tail | lateral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pectorals | normal without melanophores | |||
| Pelvics | normal (i.e. small or absent) without melanophores | |||
| Myomeres 8-11+14-18=25-27 (usually 10+14-16); few, small, late-forming spines on opercular series bones; robust form; distinct diagonal pigment bar across trunk and tail. Pigmentation: Preflexion: under midbrain; on anterior margin of midbrain at about 3.1 mm; ventrally and ventrolaterally on forebrain and dorsally on hindbrain at 3.5-4 mm; along cleithrum, extending forward onto otic capsule at 3.5-4 mm; anteriorly and dorsally on gut; ventrolaterally in vicinity of myomeres 5-7; diagonal bar across tail in vicinity of postanal myomeres 2-7, spreading cephalad dorsally and caudad ventrally; anteriorly on dorsal fin at 3.1 mm, on anal fin at 3.5 mm. Flexion-postflexion: increasing on brain and snout, laterally on trunk and tail; present or absent on pelvic fins after 5 mm. Sequence of fin development: pectorals, dorsal, caudal, anal, pelvics. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 27 | 25 | 36655 |
| 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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