FishBase |
Main Ref: | Russell, F.S. 1976 |
max | min | mod | Ref. | |
Length at birth (mm) | 10 | 4 | 7.2 | 37 |
Preanal L. % TL | 82.1 |
Place of development | planktonic | |||
Larval area | Northeastern Atlantic (British coasts: Plymouth area); Northwestern Atlantic (Delaware Bay) | |||
Yolk-sac | elongated | Ref: | ||
Yolk | unsegmented | Oil globules | no oil globule | |
Rows on tail | ventral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on trunk | |||
Yolk is usually completely absorbed when the larvae have reached lengths of 8-10 mm (Ref. 37). Remnants of yolk may persist in some specimens as long as 12 mm (Ref. 33011). Pigmentation: Line of chromatophores between body and intestine on anterior half of body, ventrally along intestine on posterior half; concentration of pigment in vent region. |
Striking feature | none | |||
Striking shape lateral | eel-like | dorsal | normal (not striking) | |
Striking feature | none | |||
Shape of gut | tube-like | |||
Gas bladder early | late | |||
Spinal armature early | no spines | late | no spines | |
Pigmentation early | ||||
Rows on tail | ventral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on trunk | |||
Rows on tail | ventral row | |||
Other melanophores on tail | no other melanophores | |||
Melanophores on head + trunk | melanophores on trunk | |||
Peritoneum | with row of melanophores | |||
Pectorals | normal melanophores at fin base | |||
Pelvics | normal (i.e. small or absent) without melanophores | |||
In general in northern areas, post larvae will be most abundant in late spring and summer, while in the south they will predominate during the late winter and early spring (Ref. 37). Pigmentation: Body transparent, pigment increased in density in region of anus and below pectorals. Sequence of fin development: dorsal (10.5 mm); anal (16-29 mm). |
L 1st feeding | Ref. | Months of presence of larvae | ||||
max | 10 | Jan | Feb | Mar | Apr | |
min | 8 | May | Jun | Jul | Aug | |
mod | 9 | Sep | Oct | Nov | Dec |
Water parameters Metric characters |
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