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Larvae Information Summary for
Scomber scombrus
| Main Ref: | Russell, F.S. 1976 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 3.9 | 2.46 | ||
| Preanal L. % TL | 51.8 | 35.4 | 41.1 | 37 |
| Place of development | planktonic | |||
| Larval area | Northeastern Atlantic (British coasts); Northwestern Atlantic (Delaware Bay) | |||
| Yolk-sac | elongated unpigmented | Ref: | 37 | |
| Yolk | unsegmented | Oil globules | one oil globuleposteriorventralpigmented | |
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | tail partly covered with melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| A group of melanophores on the head. Peritoneal black pigment occurs on the upper half of the abdomen. Vent opens at the margin of the finfold. | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | tadpole-like | |
| Striking feature | none | |||
| Shape of gut | triangular | |||
| Gas bladder early | invisible | late | invisible | |
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | dorsal + lateral + ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | covered with melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | normal (i.e. small or absent) | |||
| At 6 mm, yolk-sac is absorbed, sharp teeth on upper and low jaws. A flask-shaped form of the stomach and rectum is present. Pigmentation: a group of melanophores on the head. Ventral and dorsal melanophores start a definite distance behind the anus. Sequence of fin development: caudal (6 mm); second dorsal (9 mm); anal (9 mm); first dorsal (12-15 mm); finlets (22) | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 31 | 65 |
| L 1st feeding | Ref. |
Months of presence of larvae
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| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | 4.5 | Sep | Oct | Nov | Dec | |
| Water parameters Metric characters |
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