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Larvae Information Summary for
Lipolagus ochotensis
| Main Ref: | Moser, H.G. and E.H. Ahlstrom 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 3 | 35604 | ||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Northeastern Pacific (California Current region); Northwestern Pacific (Japan) | |||
| Yolk-sac | Ref: | |||
| Yolk | segmented | Oil globules | more than one oil globule | |
| Rows on tail | no rows | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | no melanophores on head or trunk | |||
| Pigmentation: on notochord tip. | ||||
Post larvae
| Striking feature | stalked eyes | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | stalked eyes | |||
| Shape of gut | elongated | |||
| Gas bladder early | late | |||
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on trunk | |||
| Pigmentation late | ||||
| Rows on tail | lateral 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 melanophores at fin base | |||
| Pelvics | normal (i.e. small or absent) without melanophores | |||
| Stalked eyes with stalk length increasing to about 20% HL at about 9 mm, decreasing to about 12% at flexion stage and to 2-4% in post flexion stage; notochord tip pigment in early preflexion stage; hypaxial pigment series along entire body, epaxial series on posterior 33% of body; pigment series along hindgut. Pigmentation: Preflexion: below pectoral fin base lateral to liver; on terminal gut section; series of about 5 on lower trunk, increasing to about 12 at end of stage; pair on terminal gut increases to series extending forwards to entire hindgut; internal series on isthmus; series on epaxial myomeres above hindgut. Flexion-postflexion: hypaxial series increases to about 1 per myomere from pectoral fin base to caudal fin; on hypural; on opercle; on upper and lower jaws; laterally on brain; postorbital and otic regions. Sequence of fin development: caudal, anal, dorsal, pectorals and pelvics. Distinguishing characters from other bathylagids with linear series of smaller melanophores: posterior gut melanophores larger and fewer; anterior region of gut lacks pigment; epaxial myomere series limited to posterior region; fin rays form in finfold, away from body margin. Distinguished from B. bericoides by: presumably due to unavailability of small larvae, eye stalks are longer at comparable stages. Distinguished from B. pacificus by: series of melanophores as opposed to isolated spots. Also Ref. 265. | ||||
| 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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