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Re: [Killietalk] Egg size
From: kcook at sdgdocs_com
To: killietalk at aka_org
Sent: Wed, 4 Apr 2007 4:08 PM
Subject: [Killietalk] Egg size
Some Aphyosemion lay large eggs (e.g. herzogi, primigenium) while
small (e.g. striatum, bivs). Is this an indication of how closely
these fish are, or is egg size random?
One for the taxonomists to chew on.
I have measured egg diameters of literally hundreds of species and I
can attest to the fact that the egg diameter is very species specific,
although young adolescent fish sometimes lay smaller eggs. Those eggs
seem a little less viable than those from mature fish. The largest eggs
are from some Rivulus, Lamprichthys and Gnatholebias species. The
smallest are from some of the Nothobranchius species, like eggersi.
Most are within the range of 0.8 mm diameter to about 2,2 mm diameter.I
published much of this data several years ago in JAKA, but have
literally tripled the data since then. Reference: JAKA Jan/Feb 2000
Volume 33, No. 1
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