Larvae Information Summary for
Chelon labrosus
| Main Ref: | Bertolini, F., U. D'Ancona, E. Padoa Montalenti, S. Ranzi, L. Sanzo, A. Sparta, E. Tortonese and M. Vialli 1956 | |||
Yolk-sac larvae
| min | max | mod | Ref. | |
| Length at birth (mm) | 4.2 | |||
| Preanal L. % TL | 49 |
| Place of development | planktonic | |||
| Larval area | to be filled | |||
| Yolk-sac | ovoid pigmented | Ref: | ||
| Yolk | Oil globules | one oil globuleposteriorotherpigmented | ||
| Rows on tail | no rows | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
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 | ventral row | |||
| Other melanophores on tail | tail partly covered with melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | dorsal row | |||
| Other melanophores on tail | tail partly covered with melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Peritoneum | covered with melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| There are two rows of melanophores in the ventro-opercular region and one or two rows in the gular region which usually extend beyond the eye into the posterior sector (Ref. 74869). | ||||
Meristic characters
| min | max | mod | Ref. | |
| Total number of myomeres | 24 | 26 | 25 | 226 |
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | 4.72 | Sep | Oct | Nov | Dec | |
| Water parameters Metric characters |