Re: [Killietalk] Shipping eggs

["Ken" <ken_combs at sbcglobal.net>]

How soon tho? IME freshly picked eggs are worse than near hatching ones...
Someone sent me about 6 species last winter, almost all were within 2-3 days
of hatching and many fry had already hatched...heck I've had near 100% luck
with water shipped eggs within the USA

But easily the worse hatching rates are aphyosemions in peat...gheez, if I
get 1/2 to hatch it was a blessing, usually it's 1 or 2 fry...I just don't
say anything and move on

...worse are those "hand counted" SA annuals...seems when I get a "WS", I
get more fry than I can use, but when I see "simsonicthys.sp 15 eggs", I
don't get it at all, I can't envision someone sifting through a pile of peat
finding those things

...when has anyone ever seen any SA annual lay less thn 20eggs week (other
than ghisofoli or sumthin like that)

KC

-----Original Message-----
From: killietalk-bounces+ken_combs=sbcglobal.net at actwin.com
[mailto:killietalk-bounces+ken_combs=sbcglobal.net at actwin.com] On Behalf Of
Brian Watters
Sent: Tuesday, March 10, 2009 4:43 PM
To: killifish discussion list
Subject: Re: [Killietalk] Shipping eggs

Pablo Robles wrote:

>
> I have sent K. marmoratus eggs to Israel, Japan, Argentina, UK and all
> over USA... always in water and no antifungal agent. In my case the
> trick is to ship them very early after collecting them, otherwise they
> hatch in transit which has happened to me too.
>

The same general principle applies when shipping annual eggs. They stand the
best chance of surviving the shipping if they are shipped soon after
spawning, but also allowing time to ensure that they are viable. Annual eggs
in Diapauses I and II are most resistent to environmental stress. At the
pre-hatching stage (Diapause III), when they are "eyed up" they are most
sensitive to environmental stress so sudden changes in temperature, extremes
in temperature, changes in pressure, etc., will quite easily cause them to
hatch and, if still in peat (or small volume of water sealed in a vial), to
die. Shipping eyed up eggs will, therefore, more often than not result in
unintentional "force-hatching".
___________________________
Brian Watters
6141 Parkwood Drive
Nanaimo, BC, V9T 6A2
Canada
Ph: (250) 760-0564
E-mail: bwatters at shaw_ca

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