Larvae Summary

Larvae Information Summary for Morone saxatilis

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Main Ref:

Scotton, L.N., R.E. Smith, N.S. Smith, K.S. Price and D.P. de Sylva 1973

Yolk-sac larvae

	max	min	mod	Ref.
Length at birth (mm)	3.7	2
Preanal L. % TL

Place of development
Larval area	Delaware Bay (USA)
Yolk-sac	elongated	Ref:
Yolk		Oil globules
Rows on tail	no rows
Other melanophores on tail	no other melanophores
Melanophores on head + trunk	melanophores on trunk
Large yolk-sac extends in front of head. At about 5 mm, part of yolk absorbed; melanophores along ventral surface.

Post larvae

Striking feature	none
Striking shape lateral	normal (not striking)	dorsal
Striking feature	none
Shape of gut	elongated
Gas bladder early	pigmented	late
Spinal armature early	no spines	late	no spines
Pigmentation early
Rows on tail	no rows
Other melanophores on tail	no other melanophores
Melanophores on head + trunk	melanophores on trunk
Pigmentation late
Rows on tail	no rows
Other melanophores on tail	no other melanophores
Melanophores on head + trunk	melanophores on trunk
Urostyle region early	unpigmented	late	unpigmented
Pectorals	normal
Pelvics	normal (i.e. small or absent)
At 7.5 mm, body slender, yolk-sac absorbed; pigmentation on ventral part of body, upper surface of air bladder and visceral mass; teeth visible. At about 10 mm, dorsal and anal fins somewhat differentiated; caudal rays well developed. At 15 mm, fins well formed, except for spinous dorsal and pelvics. Fish between 9-15 mm possess 2 anal spines; fish greater than 20 mm have 3 anal spines.

	L 1st feeding	Ref.	Months of presence of larvae Ref.
max	7.5	14096	Jan	Feb	Mar	Apr
min			May	Jun	Jul	Aug
mod			Sep	Oct	Nov	Dec

Water parameters Metric characters

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