Austrolebias nigripinnis

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12 Jun 2016 21:26 #1 by Eric (Eric Corcoran)
Bought 30 eggs about a month ago. When I wet them about 20 or so hatched but unfortunately im only left with 2 as all others became belly sliders. I reckon i didn't have enough oxygen in the water.
On a good note I do think the 2 that are left are a male and female.
Pictured below is the young male





Eric
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12 Jun 2016 23:19 #2 by wildlifebiology93 (Sean O'Sullivan)
Handsome little fella Eric.
What source do you get the water you wet the eggs from Eric?
Tank,tap,rainwater etc?

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12 Jun 2016 23:22 #3 by igmillichip (ian millichip)
That's a pity to hear.

These are awesome fish.

I can't remember havign belly-slider problems with this species (but my memory is now of an old codger :D )..........but there are a number of factors that can be at play in killies: egg-hatching at the wrong point in a diapause (or triggering multiple phases of diapause), for this species, I would tend to incubate at 3-5 months but check on the eggs for the "right time to water", too high or too low a temp (for this species I would make sure the eggs are not incubated above about 23/24 C), plus other factors (including oxygen)

I would usually guess problems of too high a temp is common........... I have found that metabolism of some of this genus is higher at cooler temperatures but that increased metabolism increases longevity [counter-intuitive perhaps].

This is certainly a species that I would love to see more people keeping and breeding.

ian

Irish Tropical Fish Society (ITFS) Member.

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13 Jun 2016 20:54 #4 by Eric (Eric Corcoran)
Wildlifebiology93 I use a 50 50 mix of ro and tap

Ian I think the mistake I made was after I transferred the fry to a larger tub with a piece of an oxytab I put the tub on top of a tank with lights on to keep it warm but when I checked the temp a couple of hrs later it was up to 28c so im thinking that had an affect

Eric

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13 Jun 2016 22:10 #5 by john gannon (John Gannon)
@ian are these the same species that you kept. if so a beutiful fish

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14 Jun 2016 18:50 #6 by john gannon (John Gannon)
my bad ian they were the notho. ribripinnis

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14 Jun 2016 22:27 #7 by igmillichip (ian millichip)
John G, I used to keep and breed this species and the species you are thinking about.

ian

Irish Tropical Fish Society (ITFS) Member.

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