Re: NANFA-- Wisconsin Fundulus (was hellbenders plus!)

Steffen Hellner (
Mon, 12 Jan 2004 17:35:56 +0100

>> There have been Cynolebias (south american annual killis) disappeared from
>> widely isolated biotopes for eight years and then suddenly were back. How
>> comes? These ponds dry up completely and have no connection with permanent
>> waters. Nature can be more than strange. It4s in many respects far behind
>> our imagination.

> Steffen, these annual killis have resting eggs based on much the same
> principal of brine shrimp eggs. They can dry out and the recipe for more
> killis is
> "just add water".
Partly right, but these eggs cannot stay for longer than 2 years from my
experience. I tried even with species which are said to be able to stay for
three years and there was no way getting out any fry after more than 1.5
years (2 dry seasons in average). And this even from peats with several
hundreds of eggs. This of course is from aquarium fish and representative
for nature completely. I am breeding these fish for 30+ years now, mostly
all species ever available. I highly doubt that even a single egg will be
able to rest for 8 years in nature. To me it4s simply, that is what I wanted
to point out, that collections are spotlight impressions. A species can be
present but not found, or just have died of the generation much earlier,
then be reduced to very limited numbers, and re-establish after years in
detectable numbers. or they may drift away and back. Look at the discus in
Amazone. There are "local varieties" named but it is a fact that large
groups drift up and down stream over the year and not always come back to
where the were. One year you find blue discus, the next year Heckel or green
at the same site.
You in the USA have the striking opportunity to observe you fish of interest
right outside the door year around in many cases. In the tropics this is
started e.g. in Brazil by aquarists. And after years there will be a founded
statement possible, finally.

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