Re: [Killietalk] Diapterons: defect genetic or enviroment

["Robert Goldstein" <rgoldstein at rjgacarolina_com>]

There is scientific literature that correlates colder temperatures with 
fewer vertebrae in killifishes, and vitamin deficiencies with bent spines in 
many fishes.  Correlations are not proof of cause and effect, but they 
should be considered.

----- Original Message ----- 
From: "Miguel Angel" <misaher at yahoo_es>
To: "lista AKA" <killietalk at aka_org>
Sent: Friday, August 03, 2007 9:24 AM
Subject: [Killietalk] Diapterons: defect genetic or enviroment


>I keep for two years Diap. Georgiae 95 Essongville without problems. They 
>spawn, hatch well the eggs and they developed more or less normally. I also 
>have Diap. Cyanostictum from 2006 november.
>
> Some young of georgiae and cyanostictum that was born at 2006 November are 
> "short". The aspect of the fish is like an adult but its form is like if 
> we compress it the length, keeping the height. More or less their length 
> is around 2-2,5cm. They are healthy but abnormally short. They reminds me 
> when years ago a friend talk me about the killis  "bonsai".
>
> Reading something of information that there is at internet, somebody 
> attributes to low temperatures during the juvenile time the fact that they 
> cut  the growth and stay small. Other attributes it to the inbreedings 
> with brothers. It says to the increase on infertility and the fish to stay 
> small.
>
> Those born in November are the first generation of reproduced Diap. 
> georgiae. The cyanostictum comes from some eggs that a friend give me. The 
> hypothesis that the low temperatures causes "dwarfism" can be true because 
> some georgiae from  2006 June (first generation) are perfect.
>
> As control group I have some georgiae fry (2ª generation) and fulgens (1ª 
> generation) that were born me in March. For the moment, their aspect is 
> normal, lengthened and fine. We will see that it happens when I breed the 
> "short" cyanostictum and georgiae. I will see that it occurs to the fry; 
> if they "dwarfism" is heredity or if they will have a good development. I 
> must maintain the temperature since they born at 23-24ºC. to discard the 
> influence of the low temperature.
>
>
> Did somebody happen something similar? Up to now I never see on  my 
> breeding killis  symptoms of "dwarfism". It is certain that the fish 
> developed in small aquariums usually have less size than those that have 
> grow in big aquariums. But this affects to the general aspect and the 
> obtained fish are proportional and not compressed lengthwise.
>
> Any comment is appreciated
>
> Best wishes from Spain
> Miguel Angel Saiz
> www.misaher.es
>
>
>
> ____________________________________________________________________________________
> Sé un Mejor Amante del Cine
> ¿Quieres saber cómo? ¡Deja que otras personas te ayuden!
> http://advision.webevents.yahoo.com/reto/entretenimiento.html
>
> Join the AKA at http://www.aka.org/aka/modules/content/index.php?id=9.
> Archives are at http://fins.actwin.com/killietalk/
> Modify your subscription at 
> http://www.actwin.com/mailman/listinfo.cgi/killietalk
> 


Join the AKA at http://www.aka.org/aka/modules/content/index.php?id=9.
Archives are at http://fins.actwin.com/killietalk/
Modify your subscription at http://www.actwin.com/mailman/listinfo.cgi/killietalk