| FishBase |
Larvae Information Summary for
Urophycis chuss
| 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) | 2.29 | 1.76 | ||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Middle Atlantic Bight (Delaware Bay, New Jersey, Virginia) | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Vent opens laterally at the base of finfold. Large pigment spots present mainly along dorsal and ventral outline and on top of head. Oil globule conspicuously pigmented. | ||||
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 | 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 | no rows | |||
| Other melanophores on tail | tail partly covered with melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal | |||
| Pelvics | with elongated fin rays with melanophores | |||
| Yolk-sac absorbed at about 2.2 mm. Pigmentation: a single melanophore on the nape, dorso-ventral pair midway back on body, and the dorsal surface of gut is pigmented. This pattern persists until about 6 mm, then pigment becomes scattered. Distal pigments present in pelvics. Sequence of fin development: pelvic (2.75 mm); second dorsal and anal (7 mm) | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 51 | 45 | 32309 |
| 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 |
| Back to Search |