Larvae Information Summary for
Chirolophis ascanii
| Main Ref: | Russell, F.S. 1976 | |||
Yolk-sac larvae
| min | max | mod | Ref. | |
| Length at birth (mm) | 10 | |||
| Preanal L. % TL | 40 |
| Place of development | planktonic | |||
| Larval area | to be filled | |||
| Yolk-sac | other unpigmented | Ref: | ||
| Yolk | unsegmented | Oil globules | one oil globuleanteriorventralunpigmented | |
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Yolk sac rounded. Anus is about 1.25 mm behind the end of the yolk sac (TL 10 mm). A row of internal notochordal melanophores from head to tail. | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | normal (not striking) | |
| Striking feature | none | |||
| Shape of gut | elongated | |||
| Gas bladder early | invisible | late | invisible | |
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | normal (i.e. small or absent) | |||
| Lateral row of melanophores only in posterior part of tail. There are some melanophores on the head. | ||||
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | 14 | Jan | Feb | Mar | Apr | |
| min | 13 | May | Jun | Jul | Aug | |
| mod | 13.5 | Sep | Oct | Nov | Dec | |
| Water parameters Metric characters |