Larvae Summary

Larvae Information Summary for Ichthyococcus ovatus

( not available )

Main Ref:

Bertolini, F., U. D'Ancona, E. Padoa Montalenti, S. Ranzi, L. Sanzo, A. Sparta, E. Tortonese and M. Vialli 1956

Yolk-sac larvae

	max	min	mod	Ref.
Length at birth (mm)			2.2
Preanal L. % TL			81.8

Place of development	planktonic
Larval area	Eastern Atlantic
Yolk-sac	spherical	Ref:
Yolk	segmented	Oil globules	one oil globuleposteriorcentral
Rows on tail	no rows
Other melanophores on tail	no other melanophores
Melanophores on head + trunk	no melanophores on head or trunk

Post larvae

Striking feature	light organs
Striking shape lateral	eel-like	dorsal
Striking feature	light organs
Shape of gut	tube-like
Gas bladder early		late
Spinal armature early	no spines	late	no spines
Pigmentation early
Rows on tail	ventral + lateral row
Other melanophores on tail	no other melanophores
Melanophores on head + trunk	melanophores on head + trunk
Pigmentation late
Rows on tail	ventral + lateral row
Other melanophores on tail	tail partly covered with melanophores
Melanophores on head + trunk	melanophores on head + trunk
Urostyle region early	pigmented	late	pigmented
Pectorals	other with few scattered melanophores
Pelvics	normal (i.e. small or absent) without melanophores
A lateroventral row of black pigments. Eye ellipsoidal. Pectorals with a rounded dorsal part and with a very elongated ventral part. Intestine protrudes from the anal aperture outside the body. At 13 mm subcircular eyes, head no more depressed. Pigmentation: Pigment profusely distributed on all myomeres below the lateral midline.

Meristic characters

	max	min	mod	Ref.
Total number of myomeres			39
Preanal number of myomeres			26

	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