Re: [Killietalk] How long?

["Tim Addis" <timaddis at killifish_force9.co.uk>]

>I kept a huberi strain from 1988 until 2004 when they finally pooped
> out, That's 16 years. Mow I have Mogen's GSJ 00/02 strain going to
> replace them.

You did very well. To keep a killie population this long breeding 
brother/sister is good going. What's that F20+?
It is perhaps the most difficult question of all. How can I keep a 
population pure over a long period & keep them going? Most times their is no 
link with anyone to cross bloodlines to strengthen the line. A well 
structured conservation program is the only way to address this problem but 
it's not feasable in reality (at least in the UK).
We continually lose populations still. Of course it is important to keep 
these fish seperate from other populations in certain circumstances.
I'm wondering about Fundulopanchax here. Some of these sp.  fade within a 
few generations of brother/sister breeding programs. Should we not start 
cross blooding restricted distributed sp. such as deltaensis. I'm keeping a 
code number going over a lot of generations. I have nobody to exchange blood 
line with despite putting them out far & wide. This fish will eventually 
become totally infertile & die off.
We have too much live material coming into the killie market to keep them 
all going long term. The recently mentioned Fp.walkeri Kutunse is an example 
of a strong sp. capable of maintaining a strong line through brother/sister 
breeding lines. Collected in 1974 & still going strong. It's good that we 
have photos of the original wild stock to compare them but stock these days 
has had to change in colour/patterning. Over 30 years in captivity. Not all 
killies are this strong.
Bound to create some debate............

                           Tim 

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