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Pleuronectiformes - Pleuronectidae

Pleuronectes quadrituberculatus (Alaska Plaice)

Illustration Meristics Life History ELH Descr. Distribution Footnotes
More information for this taxon at: LarvalBase | FishBase | Univ. Washington Data

EGG INFORMATION

Egg Diameter (min-max in mm): 1.66 - 2.21
Number of Oil Globules (min-max):
Oil Globule Diameter (min-max in mm):
Yolk:
Chorion: Thick wavy surface (color: bronze hue)
Egg/Embryo Pigment: head, nape, gut, yolk, dorsal, lateral, ventral, pvm, anus,
Pigment Diagnostics: Late stage embryo has double row of postanal ventral pigment; yolk pigment, most on posterior half
Diagnostic Characters:

LARVAE INFORMATION

Hatch Size (min-max in mm SL): 5.85
Preanal Length (%SL): <50
Flexion Length (in mm SL): ~8 - 10
Length at Transformation (in mm SL): Beginning by 10.7
Fin Development Sequence: Caudal, dorsal and anal, pelvics, pectorals
Larval Pigment Regions: In each developmental larval stage, pigment is present in the regions listed below
(click for pigment regions)
Yolk-sac: yolk, mouth, cheek, isthmus, dorsal gut, ventral gut, anal finfold, dorsal, ventral,
Preflexion: mouth, cheek, isthmus, dorsal gut, lateral gut, ventral gut, anal finfold, dorsal, ventral, mediolateral, caudal,
Flexion: mouth, cheek, isthmus, dorsal gut, lateral gut, ventral gut, anal finfold, caudal finfold, dorsal, ventral, mediolateral, caudal,
Postflexion: mouth, cheek, isthmus, dorsal gut, lateral gut, ventral gut, anal finfold, caudal finfold, dorsal, ventral, mediolateral, caudal,
Juvenile:
Pigment Diagnostics: Distinguished from other pleuronectids without pigment bands by: urostyle unpigmented, no slash-like pigment along hypaxial myomeres, finfold pigment mainly restricted to anal finfold
Diagnostic Characters: Distinguished from other pleuronectids without pigment bands by: urostyle unpigmented, no slash-like pigment along hypaxial myomeres, finfold pigment mainly restricted to anal finfold, size at transformation ~10 mm SL


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last updated: August 2019