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Re: Water incubation of Nothos.
The development of the eggs makes sense because of the shallow water.
The increased  of O2 is what gives annual eggs the "signal" to
develop, is it not? What DOESN'T figure is the exceptionally short
You don't suppose it had anything to do with the acriflavine?
I would hazard a guess that there are very few (if any) "obligate"
annuals. As we've learned in the past few years, weather is
unpredictable, inconsistent. A species that absolutely depends on a
stereotyped weather pattern would wind up extinct in short order. An "El
Nino" or two would wipe an entire geographical region clean of annuals.
It would be interesting to have the next batch of collectors to go notho
hunting check for the presence of fry in pools with adult fish. My
guess is there would not be any, due to the "black mud" common to notho
habitats. The anaerobic conditions would stall the devlopment of
embryos. In our increasingly clean and well-aerated aquaria, the
conditions are further and further removed from those in the wild,
leading to unusual occurences like the ones described in this thread.
Long live the "water incubation" thread! :-)
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