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Larvae Information Summary for
Anchoa hepsetus
| Main Ref: | Fahay, M. 1983 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 4 | 3.6 | ||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | Mid-Atlantic Bight; Delaware Bay (USA) | |||
| Yolk-sac | elongated unpigmented | Ref: | ||
| Yolk | Oil globules | no oil globule | ||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | no melanophores on head or trunk | |||
| Yolk tapers posteriorly. Anus behind beginning of posterior 1/4 of body at hatching; fins lacking; body transparent (Ref. 40860). | ||||
Post larvae
| Striking feature | duck-billed shape of head | |||
| Striking shape lateral | eel-like | dorsal | ||
| Striking feature | duck-billed shape of head | |||
| Shape of gut | tube-like | |||
| Gas bladder early | late | |||
| Spinal armature early | late | |||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Peritoneum | without melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| Body long and slender, with vent under dorsal fin; mouth large, terminal, extends to middle of eye; becomes subterminal; gut with muscle-band striations posteriorly; little pigment; overlapping dorsal and anal fins. Anal fin origin under posterior insertion of dorsal fin. At 10.0 mm, chromatophores on chest and ventrally from anal base to caudal (Ref. 40860). Sequence of fin formation: caudal; dorsal and anal; pectoral; pelvic. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 44 | 40 | 68 |
| L 1st feeding | Ref. |
Months of presence of larvae
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| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |
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