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Re: semi-annuals

There are two primary reasons for treating
semi-annuals  to a drying stage for egg incubation.  
1.  Semi-annual water incubated eggs will take 4 to 12
weeks to develop and hatch.  Two fertile eggs
deposited on the same day may hatch at 4 weeks while
the sibling egg may hatch at 12 weeks.  So the eggs
stored in peat will develop and be ready to hatch at
the same time.  The end result is that all the
resulting fry will bre the same size and therefore
less likely to be a meal for a larger sibling.
2.  The eggs are more susceptible to environmental
hazards during water incubation and losses appear to
be greater in water incubation.  Therefore many who
collect semi-annual eggs will water incubate until
they are sure that the eggs are viable and place those
eggs on peat for final development. 
--- John Pendergrass <pendergrassj at hotmail_com> wrote:
> I have a question. I just read that fish that are
> considered semi-annual can 
> be water incubated. I know this is true for AMI. I
> wanted to know if it is 
> true for all semi-annual ie SJO. I also wanted to
> know if it is the case 
> that they can all be water incubated then why dose
> everyone recommend drying 
> on peat for 6 weeks or so? This seems like an extra
> hassle if it is not 
> necessary.
> 
> Thanks,
> John
> 
>
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=====
Allen H. Johnson
132 Whispering Oaks Dr.
West Chester, Pa.  19382

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