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Larvae Information Summary for
Chelidonichthys lucerna
| Main Ref: | Russell, F.S. 1976 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 3.7 | 37 | ||
| Preanal L. % TL | 48 | 37.3 | 42 | 69 |
| Place of development | planktonic | |||
| Larval area | to be filled | |||
| Yolk-sac | ovoid pigmented | Ref: | ||
| Yolk | unsegmented | Oil globules | one oil globuleposteriorventral | |
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| At the late yolk-sac larva the pectoral fins are developed. | ||||
Post larvae
| Striking feature | duck-billed shape of head | |||
| Striking shape lateral | normal (not striking) | dorsal | normal (not striking) | |
| Striking feature | duck-billed shape of head | |||
| Shape of gut | triangular | |||
| Gas bladder early | invisible | late | invisible | |
| Spinal armature early | several different spines | late | several different spines | |
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | tail partly covered with melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | one dorso-ventral cluster or band | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | unpigmented | late | pigmented | |
| Peritoneum | covered with melanophores | |||
| Pectorals | strikingly large with rows of melanophores | |||
| Pelvics | with elongated fin rays with melanophores | |||
| Pectoral fins with rounded margin. Opercular, preopercular, occipital, otocystic, and suborbital spines are developed. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 34 | 263 |
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | 5.1 | Sep | Oct | Nov | Dec | |
| Water parameters Metric characters |
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