FishBase |
Main Ref: | Scotton, L.N., R.E. Smith, N.S. Smith, K.S. Price and D.P. de Sylva 1973 |
max | min | mod | Ref. | |
Length at birth (mm) | 1.99 | 1.49 | 1.75 | 13501 |
Preanal L. % TL |
Place of development | in close association with substrate | |||
Larval area | Delaware Bay | |||
Yolk-sac | pigmented | Ref: | ||
Yolk | Oil globules | one oil globuleposteriorventralpigmented | ||
Rows on tail | ventral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on head + trunk | |||
Eggs hatch after 40 hours (Ref. 54461). At 1.8 mm, body is elongated and slender; large eye covering most of the side; group of yellow chromatophores present behind the eye; greatest depth of body is 4.0-4.5 in NL; ventral series of melanophores present; yolk-sac absorbed at 1.8 mm (though yolk-sac was present on a 2.2 mm specimen from Chesapeake Bay). |
Striking feature | lower jaw strongly projecting | |||
Striking shape lateral | normal (not striking) | dorsal | ||
Striking feature | lower jaw strongly projecting | |||
Shape of gut | triangular | |||
Gas bladder early | late | |||
Spinal armature early | late | |||
Pigmentation early | ||||
Rows on tail | ventral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on trunk | |||
Pigmentation late | ||||
Rows on tail | lateral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on trunk | |||
Urostyle region early | unpigmented | late | unpigmented | |
Peritoneum | with row of melanophores | |||
Pectorals | normal without melanophores | |||
Pelvics | normal (i.e. small or absent) without melanophores | |||
At 3.0 mm TL, body depth has increased; ventral series of melanophores more pronounced. At 4.6 mm TL, caudal rays present and dorsal and anal fin rays are slightly differentiated; most melanophores have disappeared except for pigment spots at the base of the anal and on gut (not found in C. nebulosus and C. nothus). At 8.2 mm TL, anal fin rays and soft dorsal rays are present. At 10.5 mm TL, nearly the full complement of dorsal fin elements is present; some lateral pigment; the young assume demersal existence. At 17 mm TL, there are four vertical bands or saddles of chromatophores; anal pigment spot is gone. Body depth increases in proportion to length from hatching until about 17 mm TL, then body becomes more slender. |
L 1st feeding | Ref. | Months of presence of larvae | ||||
max | Jan | Feb | Mar | Apr | ||
min | May | Jun | Jul | Aug | ||
mod | 1.8 | 40811 | Sep | Oct | Nov | Dec |
Water parameters Metric characters |
Back to Search |