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Larvae Information Summary for
Melanolagus bericoides
| Main Ref: | Moser, H.G. and E.H. Ahlstrom 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Northeastern Pacific (California Current region); Northwestern Pacific (Japan) | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | stalked eyes | |||
| Striking shape lateral | normal (not striking) | dorsal | normal (not striking) | |
| Striking feature | stalked eyes | |||
| Shape of gut | tube-like | |||
| Gas bladder early | late | invisible | ||
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | no melanophores on head or trunk | |||
| Pigmentation late | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal melanophores at fin base | |||
| Pelvics | normal (i.e. small or absent) without melanophores | |||
| Extremely long eye stalks, about 50% HL in preflexion stage, maximum of about 70% at flexion stage; sparse pigmentation, limited to gut region; extremely long gut, especially in postflexion stage; differs from Atlantic larvae of the same species in having relatively longer eye stalks and in brain shape (width of optic lobe region slightly greater than length, versus width equals 80% of its length in Atlantic larvae); differs from B. longirostris in having less pigment and relatively longer eye stalks. Pigmentation: Preflexion-postflexion: lateral to liver; dorsally on terminal section of gut; series up to 11 along lateral gut surface; in some late postflexion larvae; on lower jaw, isthmus, opercle, pectoral fin base, and lateral region of caudal peduncle. Sequence of fin development: caudal, anal, dorsal and pectorals and pelvics. | ||||
| 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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