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
Back to Search
Comments & Corrections

php script by kbanasihan, 09/07/10 ,  last modified by sortiz, 09/08/17