Larvae Summary

Larvae Information Summary for Sprattus sprattus

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Main Ref:

Russell, F.S. 1976

Yolk-sac larvae

	max	min	mod	Ref.
Length at birth (mm)	3.7	2.55	3
Preanal L. % TL	85	80	84	37

Place of development	planktonic
Larval area	to be filled
Yolk-sac	ovoid unpigmented	Ref:
Yolk	segmented	Oil globules	no oil globule
Rows on tail	no rows
Other melanophores on tail	tail with single melanophore
Melanophores on head + trunk	melanophores on head + trunk
Scattered small melanophores on the head and dorsal region.

Post larvae

Striking feature	none
Striking shape lateral	normal (not striking)	dorsal	normal (not striking)
Striking feature	none
Shape of gut	tube-like
Gas bladder early	invisible	late	invisible
Spinal armature early	no spines	late	no spines
Pigmentation early
Rows on tail	ventral row
Other melanophores on tail	tail with single melanophore
Melanophores on head + trunk	melanophores on head + trunk
Pigmentation late
Rows on tail	ventral row
Other melanophores on tail	tail with single melanophore
Melanophores on head + trunk	melanophores on head + trunk
Urostyle region early	pigmented	late	pigmented
Peritoneum	with row of melanophores
Pectorals	normal without melanophores
Pelvics	normal (i.e. small or absent)
At 10-11 mm: dorsal originates on 28th myomere (in pilchard on myomere 31). At 15-16 mm: caudal not yet emarginate ( in pilchard emarginate). At 18 mm: pelvic fins behind pylorous (in pilchard at level of pylorous).

Meristic characters

	max	min	mod	Ref.
Total number of myomeres	48	46	47	257

	L 1st feeding	Ref.	Months of presence of larvae
max	6	37	Jan	Feb	Mar	Apr
min	4.5	37	May	Jun	Jul	Aug
mod	5	37	Sep	Oct	Nov	Dec

Water parameters Metric characters

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