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Larvae Information Summary for  Lampetra fluviatilis
( not available )

Main Ref: Allardi, J. and P. Keith 1991
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development in close association with substrate
Larval area in mud in rivers
Yolk-sac       Ref:  
Yolk   Oil globules  
Post larvae
Striking feature other
Striking shape lateral   dorsal  
Striking feature other
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Ammocoetes: Max. size 145 mm TL. Body proportions, as percentage of TL (based on 20 specimens measuring 100-145 mm TL): prebranchial length, 6.1-9.3; branchial length, 11.1-13.2; trunk length, 49.0-53.8; tail length, 25.2-29.7. Trunk myomeres, 58-66. Extent of pigmentation (- = absence to trace; + = 1% to under 25%; ++ = 25% to under 75%; +++ = 75% or more): upper lip, - (100% of specimens); subocular, ++ (80%) or +++ (20%); lower prebranchial, - (90%) or + or ++ (5% each); upper branchial, + (100%); caudal fin, - or + (combined total 100%). Dark pigment is found on the tongue precursor bulb and along its elastic ridge. Caudal fin shape, rounded. Metamorphosing ammocoetes: 80-130 mm TL (Ref. 89241). Lives 3-5 years in the mud in rivers and migrates to the sea after metamorphosis (Ref. 2163).
  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: Palomares,Maria Lourdes D. - 09.01.92
Modified by: Luna,Susan M. - 14.09.16
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