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Larvae Information Summary for
Hemitripterus americanus
| Main Ref: | Fahay, M. 1983 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 14 | 10 | ||
| Preanal L. % TL | 50 |
| Place of development | planktonic | |||
| Larval area | Mid-Atlantic Bight | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
Post larvae
| Striking feature | ||||
| Striking shape lateral | dorsal | |||
| Striking feature | ||||
| Shape of gut | ||||
| Gas bladder early | late | |||
| Spinal armature early | several different spines | late | several different spines | |
| Peritoneum | covered with melanophores | |||
| Diagnostic characters: eyes pigmented and mouth well developed; body relatively deep, snout moderately pointed; gut long, bulging. Pigmentation: heavy dorsolaterally on head, body and peritoneum; spots develop on membranes of first and second dorsal fins and on anal fin; spots on ventral surface of lower jaw and occasionally on isthmus; few spots on ventrolateral gut but not ventral midline; ventral row of spots posterior to anal fin (deep-lying and difficult to see). Sequence of fin formation: caudal (shortly after hatching); all finrays usually complete (18.0-20.0 mm SL). | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 39 | 38 | 68 |
| 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 |
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