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Larvae Information Summary for
Pogonias cromis
| 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) | ||||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Delaware Bay | |||
| Yolk-sac | ovoid unpigmented | Ref: | ||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
| Yolk-sac present until about 5-6 mm TL. | ||||
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 | opercular spines only | late | ||
| 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 | no rows | |||
| Other melanophores on tail | more than two dorso-ventral clusters or bands | |||
| Melanophores on head + trunk | melanophores on trunk | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Pectorals | normal without melanophores | |||
| Pelvics | normal (i.e. small or absent) | |||
| At about 5 mm, 3-4 preopercular spines present; soft dorsal, anal and caudal fins generally differentiated. At about 8 mm, full complement of rays present. Pigmentation: 2 prominent chromatophores lie ventrally, behind vent. Dark chromatophores appear dorsally and on sides and begin to form the 6 black vertical bars that remain until the adult size is reached. When at 15 mm, the young drum is the adult shape and the 6 black bars are very pronounced (Ref. 1184). | ||||
| L 1st feeding | Ref. |
Months of presence of larvae
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| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |
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