Larvae Information Summary for
Avocettina infans
| Main Ref: | Matarese, A.C., A.W. Kendall, D.M. Blood and M.V. Vinter 1989 | |||
Yolk-sac larvae
| min | max | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL |
| Place of development | planktonic | |||
| Larval area | California Current region | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Melanophores on head + trunk | melanophores on trunk | |||
| Presence of several groups (usually three) of internal spots along body subaxially - about four spots in each group becoming less prominent with growth (Ref. 265). | ||||
Post larvae
| Striking feature | teeth clearly visible | |||
| Striking shape lateral | eel-like | dorsal | ||
| Striking feature | teeth clearly visible | |||
| Shape of gut | tube-like | |||
| Gas bladder early | late | |||
| Spinal armature early | no spines | late | no spines | |
| Melanophores on head + trunk | melanophores on trunk | |||
| Peritoneum | with row of melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| Leptocephalus larva; pelvic fin absent; caudal fin reduced; presence of small spots on top of spinal cord, at least posteriorly; row of spots dorsally along gut length, ventral row anterior to stomach; pigments are present at the dorsal and anal fin bases (Ref. 265). Diagnostic characters: body less elongate; caudal structure (tail more round, not filiform); position of liver and last blood vessel, 30th and 70-88th myomere, respectively (Ref. 265). Pigmentation: dorsally on notochord; three clusters (1-4 dots each) below lateral midline at myomeres 28-31, 59-61, and 97-100; dorsally along gut from liver; ventrally along gut from heart to liver (Ref. 32364). Sequence of fin development: dorsal, anal (late), caudal, pectoral. | ||||
Meristic characters
| min | max | mod | Ref. | |
| Total number of myomeres | 181 | 201 | 193 | 265 |
| L 1st feeding | Ref. | Months of presence of larvae < >Ref. | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |