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Larvae Information Summary for
Bairdiella chrysoura
| Main Ref: | Scotton, L.N., R.E. Smith, N.S. Smith, K.S. Price and D.P. de Sylva 1973 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 1.8 | 1.5 | ||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Delaware Bay | |||
| Yolk-sac | ovoid | Ref: | ||
| Yolk | Oil globules | one oil globuleposteriorcentral | ||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| At time of hatching, head is deflected; chromatophores are aggregated, forming vertical bands which break up after 5 hours. At 2.4-2.6 mm (1 day after hatching), head is no longer deflected; small amount of yolk remains. | ||||
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 | |||
| Pigmentation late | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | one dorso-ventral cluster or band | |||
| Melanophores on head + trunk | melanophores on head | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| At 2.5-2.8 mm, yolk is absorbed; 2 vertical bands are present -- one behind the head and one 2/3 distance from the vent to the posterior end of the body. At 3.5 mm, the larva is feeding actively; depth of head is greater than depth of body; vertical bands blackish. At 5 mm, body form the same as in 3.5 mm larvae; notochord curved upward. At 7-8 mm, the larva begins to assume adult characteristics. At 10-12 mm, full complement of fin rays is present; appearance similar to that of adults, except depth in thoracic region is greater and head is more blunt than in adults. At 30 mm, the larvae are miniature adults. | ||||
| L 1st feeding | Ref. |
Months of presence of larvae
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| max | 2.8 | 39467 | Jan | Feb | Mar | Apr |
| min | 2.5 | 39467 | May | Jun | Jul | Aug |
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |
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