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RE: [Killietalk] Wow great point (slaps forehead!)
Ron Lee wrote:
> Sorry if I don't comprehend it all, but why would it be so? Don't eggs
> begin some sort of embroyl development even while they're, for lack of a
> better word, embedded in submerged peat?
> Going by what you've said, would _intentionally_ leaving these submersed
> eggs (for months) be a way to delay/extend hatching time? Won't the
> eggs develope fungus?
If peat is left in a tank for a long time, especially if it is confined to a
container within the tank, it will become strongly anaerobic. It is very
easy to demonstrate this - leave a container of peat in water undisturbed
for a couple of weeks and then stir it up and it will smell strongly and
rather badly. It is a well-known fact (e.g. Scheel) that Notho eggs spawned
into an anaerobic (oxygen deficient) substrate will tend to become locked
into Diapause I and remain there for a relatively long time, hence extending
the incubation period. By prolonging the time between harvesting the peat
from your tanks, there will be a tendency for incubation times to be longer,
while collecting the peat on a weekly basis, for example, will result in
relatively short incubation times because the peat will not have a chance to
become anaerobic between collections. The eggs will not develop fungus or
deteriorate in the peat, provided the peat does not become polluted. I
regularly leave the peat in my tanks for 3 months or longer.
Now, this doesn't work perfectly because there are all sorts of other
variables such as: the type of peat used (coarse and granular, fine and
easily compacted, etc), temperature, the species involved, how the peat is
handled after harvesting, etc.
Again, I will be presenting a lot of this material in my talk at the
convention this year and will relate it to conditions that we have found in
the natural habitats. I have also discussed this idea in some of the talks I
have given on maintenance and breeding of Nothos at conventions and
affiliate club meetings, and I would imagine that some of those talks are
available through the AKA tape sales program.
> Curiousity got the better of me, but are earlier editions of the JAKA
> being digitized or archived in electronic format?
> I was momentarily an AKAer in year 1999-2000, I think, and wondered how
> later, and newer members would be able to access this wealth of
> information and experience.
> Yes, I'm aware that even when available, if it's not already, that
> paying AKA'ers are privileged to it.
Back issues of JAKA are available to members from Publication Sales. As you
point out that is one of the privileges of membership. Are you a member of
the AKA ? So far as I am aware there are plans to digitize the JAKA's but,
these tasks take time and we all have lives outside of our fish-rooms. So,
Brian R. Watters
University of Regina
Regina, Sask. S4S 0A2, Canada
Ph: (306) 584-9161 (home); (306) 585-4663 (work)
Fax: (306) 585-5433
E-mail: bwatters at sasktel_net
To join the AKA see http://www.aka.org/pages/join.html
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