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Larvae Information Summary for  Oncorhynchus tshawytscha
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Main Ref: Morrow, J.E. 1980
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development in close association with substrate
Larval area Northwest Pacific
Yolk-sac elongated     Ref:  
Yolk   Oil globules  
Rows on tail no rows
Other melanophores on tail no other melanophores
Alevins remain in gravel until the yolk-sac has been absorbed, usually about 2 to 3 weeks after hatching, then work their way through the gravel to become free-swimming, feeding fry (Ref. 27547).
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature none
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Pigmentation early
Rows on tail dorsal + lateral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on trunk
Rows on tail dorsal + lateral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on trunk
  L 1st feeding Ref. Months of presence of larvae    Ref. 
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Garilao,Cristina V. - 16.04.99
Modified by: Luna,Susan M. - 07.01.03
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