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AW: AW: mixing fry
Hi Chris,
true enough, if no water fowls go into your pond, no risk for them to carry
eggs with them. Concerning goldfish and Koi I am not a specialist. Yet I
know that not all fish eggs will survive being out of the water more than
1-2 minutes. This kind of spreading will work only with some fish species.
The eggs have to stick to the fethers, not just drop out like many eggs do
and they must survive a longer period outside of water. Many killie eggs
will stick to substrate (or feathers) and survive for a while outside of
water.
Thus it is to be expected that where water fowl turn around the mud in thier
search for food and then fly to the next water place, species get spread,
just like many of our local fish. This kind of spreading will be especially
at work in areas with many water places (eggs wont dry out).
Erik
> -----Ursprüngliche Nachricht-----
> Von: owner-killietalk at AKA_Org [mailto:owner-killietalk at AKA_Org]Im
> Auftrag von Chris Browning
> Gesendet: Donnerstag, 1. August 2002 12:30
> An: killietalk at AKA_Org
> Betreff: Re: AW: mixing fry
>
>
>
> Yes, but not all of us, possibly including Dianne, have ducks and
> other water fowl flying into our ponds. I live in San Diego
> county, actually in the mountainous region, and we have coyotes,
> which don't go into yards or anywhere near humans, rabbits, which
> don't play in water or around people, raccoons, which don't
> travel anywhere, they just go into our neighbor's yard, and
> things like sparrows and bluejays, which I seriously doubt will
> fly 20 miles to the nearest pond and drop off the eggs. If what
> you say were the case, it would be illegal to even own a pond!
> Incase you didn't know, goldfish, like koi and the like, lay
> EGGS! I definently don't see Koi fish in ANY bodies of water that
> aren't in someone's yard.
> Erik Pfingstner wrote:Hi Dianne,
>
> Here in Germany, we dont have killies as wild animals. Once I asked the
> leader of a nature association who had created a new pond. if they had put
> in some fish. He said that was not needed because it only takes
> very little
> time until there are fish in the pond. He said that ducks and other birds
> fly around from one pond to the other and carry with them in
> their feathers
> eggs of various fish.
>
> That is just one more way locations naturally mix in the wild. No storm is
> needed even for killies living in ponds like many SAAs.
>
> Erik
>
> > -----Ursprüngliche Nachricht-----
> > Von: owner-killietalk at AKA_Org [mailto:owner-killietalk at AKA_Org]Im
> > Auftrag von Brown_D at pcfnotes1_wustl.edu
> > Gesendet: Mittwoch, 31. Juli 2002 18:56
> > An: KillieTalk at AKA_Org
> > Betreff: Re: mixing fry
> >
> >
> >
> > Just to take the other side for a minute: if they truly are the same
> > species, you likely won't be able to tell them apart, as many folks have
> > said; however, you may get some degree of hybrid vigor to counteract the
> > inbreeding depression you can otherwise see in long isolated
> populations.
> > Yes, you lose the strain identity, and yes, it's a good idea to keep the
> > pure strains also, to conserve for the possibility of reintroduction to
> > native habitats in the future (under carefully controlled and officially
> > approved conditions only!), but for general aquarium
> petkeeping, the mixed
> > ancestry fish are likely to be a little hardier than the "pure"
> > populations. After all, the fish in the original locality
> naturally mix a
> > little at the margins of their range with neighboring
> populations, if not
> > by swimming upstream and down, then when there's a large storm
> or flood or
> > other event that allows some normally isolated groups to mix.
> >
> >
> > Diane Brown
> >
> > ---------------
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> > Join the AKA at http://www.aka.org/AKA/Applic.htm
> >
>
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