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Larvae Information Summary for  Macquaria ambigua
( not available )

Main Ref: Neira, F.J., A.G. Miskiewicz and T. Trnski 1998
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 4 2.5    
Preanal L. % TL 63 54    
Place of development planktonic
Larval area Lake Pamamaroo, (Darling River, southwestern NSW)
Yolk-sac       Ref:  
Yolk   Oil globules  
Post larvae
Striking feature  
Striking shape lateral   dorsal  
Striking feature  
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Diagnostic characters: large yolk sac at hatching, resorbed by flexion stage; no pigment along dorsal and lateral surfaces of trunk and tail before postflexion stage; 2-8 melanophores along ventral midline of tail, between myomeres 12-21. Sequence of fin formation: caudal (4.4-7.3 mm); dorsal (4.9-10.6 mm); anal (4.9-11.0 mm); pectoral (7.3-8.4 mm); pelvic (7.3-12.4 mm). Larvae settle on the bottom at 9.1-10.6 mm BL. Larvae are strongly attracted to light and the presence of redgum (Eucalyptus camaldulensis) timber in the water (Ref. 27441) and so naturally prefer the shallower waters over the floodplain. However, if the water quality is not suitable, the larvae may actively avoid floodplain habitats (Ref. 27442).
Meristic characters
  max min mod Ref.
Total number of myomeres 28 24   33616
Preanal number of myomeres 12 9   33616
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 21.10.98
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