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Larvae Information Summary for
Ammodytes americanus
| Main Ref: | Bigelow, H.B. and W.C. Schroeder 1953 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL |
| Place of development | in close association with substrate | |||
| Larval area | Nova Scotian Banks, Gulf of St. Lawrence, Strait of Belle Isle, Grand Bank region, coast of Newfoundland and Labrador | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
Post larvae
| Striking feature | lower jaw strongly projecting | |||
| Striking shape lateral | eel-like | dorsal | ||
| Striking feature | lower jaw strongly projecting | |||
| Shape of gut | tube-like | |||
| Gas bladder early | late | |||
| Spinal armature early | late | |||
| Peritoneum | with row of melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| Vent opens at one side, about midway back; yolk-sac is not absorbed until larvae are about 7 mm; beginnings of caudal rays visible at 8 mm and anal and dorsal fin rays appear at 13 mm (Ref. 40853). Lower jaw protrusible even at early stages of development. Distinctive row of chromatophores along dorsal side of intestine (and not ventral side as in clupeids) (Ref. 7135). | ||||
| L 1st feeding | Ref. |
Months of presence of larvae
|
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| max | Jan | Feb | Mar | Apr | ||
| min | 7 | 40853 | May | Jun | Jul | Aug |
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |
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