Larvae Summary

Larvae Information Summary for Galaxias occidentalis

( not available )

Main Ref:

Gill, H.S. and F.J. Neira 1998

Yolk-sac larvae

	max	min	mod	Ref.
Length at birth (mm)	6.1
Preanal L. % TL	77	68

Place of development
Larval area	Collie River (near Bunbury, WA)
Yolk-sac		Ref:
Yolk		Oil globules
Rows on tail
Other melanophores on tail

Post larvae

Striking feature	none
Striking shape lateral	short and/or deep	dorsal	compressed
Striking feature	none
Shape of gut	elongated
Gas bladder early		late
Spinal armature early		late
Pigmentation early
Rows on tail	dorsal + ventral row
Other melanophores on tail	one dorso-ventral cluster or band
Melanophores on head + trunk	melanophores on head + trunk
Pigmentation late
Rows on tail	dorsal + ventral row
Other melanophores on tail	one dorso-ventral cluster or band
Melanophores on head + trunk	no melanophores on head or trunk
Urostyle region early	pigmented	late	pigmented
Peritoneum	with row of melanophores
Pectorals	fin rays only melanophores at fin base
Pelvics	fin rays only
Diagnostic characters: gut very long, straight and with weak striations in transforming larvae; body lightly pigmented; 11-45 melanophores dorsally along gut; up to 29 melanophores along dorsal and ventral midlines of caudal peduncle, each merging into one solid pigmented stripe in postflexion larvae. Sequence of fin development: caudal (6.1-17.7 mm); dorsal (10.0-17.7 mm); anal (10.0-17.7 mm); pectoral (17.7-21.9 mm); pelvic (17.7->26.6 mm). Presence of minute caniniform teeth in both jaws by late flexion stage. Long preanal membrane from late flexion stage, remaining through to transforming stage.

Meristic characters

	max	min	mod	Ref.
Total number of myomeres	55	54		33842
Preanal number of myomeres	38	36		33842

	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

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