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Larvae Information Summary for
Rhabdosargus sarba
| Main Ref: | Neira, F.J., A.G. Miskiewicz and T. Trnski 1998 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 3 | |||
| Preanal L. % TL | 59 | 42 |
| Place of development | planktonic | |||
| Larval area | Southwestern Pacific: Richmond River (near Yamba), Macquarie and Tuggerah lakes (NSW); Northwestern Pacific (Japan) | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | none | |||
| Shape of gut | triangular | |||
| Gas bladder early | late | |||
| Spinal armature early | opercular spines only | late | several different spines | |
| Pigmentation early | ||||
| Rows on tail | ventral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head | |||
| 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 | pigmented | late | pigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| Small anterior and posterior preopercular spines; spine at angle moderate; posterior preopercular spines remain in postflexion larvae; 1-2 small supracleithral spines in postflexion larvae; internal melanophore under hindbrain; 2 large melanophores ventrally on gut, up to 4 from flexion stage; 408 melanophores under notochord tip. Sequence of fin formation: caudal (3.5-3.2 mm); dorsal (4.9-9.5 mm); anal (4.9-9.5 mm); pectoral (6.2-9.1 mm); pelvic (6.2-9.8 mm). Larvae settle at the bottom at 10.5-12.5 mm BL. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 25 | 24 | 33616 | |
| Preanal number of myomeres | 10 | 7 | 33616 |
| 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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