[Cyprinodontiformes] [goodeids] Ameca splendens and deformities

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Sexta-Feira, 19 de Fevereiro de 2010 - 22:14:24 WET

-----Mensagem original-----
De: www.viviparos.com [mailto:viviparos.com] 
Enviada: sexta-feira, 19 de Fevereiro de 2010 01:43
Para: 'goodeids  yahoogroups.com'
Assunto: RE: [goodeids] Ameca splendens and deformities

Hello Paul,

In Portugal we got two different aquarium strains of Ameca splendens via
The first one was imported from Czech Republic breeders and the subsequent
ones, in several succeeding importations up to now, from German breeders.
Both strains were reasonably distinguished if someone had the chance to pay
attention to each one's mature ( adult ) males.
I was the first to mix both in a single group after keep them unconnected
for 3 generations ( breeding seasons or years ).
Today there are only two hobbyists with the merged strain and, after the
deathly cold strike of January 2009, my remaining group is the last of the
Czech Republic pure lineage in Portugal, which was generously offered to me
by my friend Paulo Alves in order to compensate my lost.
All other are pure Germany bred origin.
One of the reasons for the progressive integration of the Czech Republic
stocks in to Germany original ones, it was precisely the sudden arise of a
small number of individuals showing a few physical condition problems,
exactly like those situations you are describing.
I am sending you 3 pictures attached, were it's possible to anticipate some
of the disturbances and deformities we are talking about.
I am sorry for the photos quality.
On the images " Ameca 2 " and " Ameca 3 " there is not much to comment. The
sad young male shown on image " Ameca 1 ", besides some scale malformations
( difficult to distinguish on the enclosed image ) this individual had a
missing pectoral fin too, besides deformed pelvic fins ( somehow
distinguished even on this low quality picture ).
As both lineages were kept in separate. Both tanks had exactly the same
water and environmental conditions, along with precisely the same diet for
both fish communities.
We can consider the German bred group as a kind of a control one, because
none of these disorders becomes ever evident.
My option it was the elimination of every imperfect fish from the Czech
Republic aquarium strain group, and lately the fusing of this lineage with
an equal number of German aquarium strain individuals on a single mixed
group. After this operation, there were no more situations of deformities or
other abnormal symptoms.
If you allow me a personal opinion, we are maybe facing a problem of
endogamy with one of the Czech Republic aquarium strains available in the
Situations like this had convinced me to keep my fish communities of each
species with numerous individuals as possible, but this subject is far from
being consensual.

Kindest regards



De: goodeids  yahoogroups.com [mailto:goodeids  yahoogroups.com] Em nome de
Paul Veenvliet
Enviada: quinta-feira, 18 de Fevereiro de 2010 18:54
Para: goodeids  yahoogroups.com
Assunto: [goodeids] Ameca splendens and deformities

Dear all, 
Some time ago I obtained a group of Ameca splendens of unknown origin
(aquarium strain, all I know is that they are bred in Czech republic). They
were in poor condition, but even more standing out was that several fish
show a deformed spinal column. I believe that this can have a variety of
courses, including genetic factors (inbreeding as well as mutations),
malnutriton and certain internal parasites. By now these fish have a good
condition and I have the first four young, of a female which appears
 normal. My first impression of the young was that they are OK, but now that
they swim confidently through the aquarium, it is clear that they are far
from OK: 
one might be really OK (hope I still think this when the fish grows)
one is missing the left pectoral fin
one has a deformed spine
one has a small and pobably non-functional left eye (and took several days
to have it's swimbladder functional)
I will of course selectively breed with only those fish that look completely
OK. I plan to make notes about possible deformities in coming litters. To me
the variety of deformities is standing out and also somewhat frightening. Is
this a glimpse of the future of our aquarium strains? 
I wonder if any of you made similar observations of abnormalities and I
would appreciate it if someone can share data on abnormalities in the other
(more recently imported/known origin) strains of Ameca splendens. 
I am reluctant to give up on this strain and plan to continue breeding them
in order to see how other litters will look and if selection can improve the
health of such a strain. 
Kind regards, 
Paul Veenvliet
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