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My C.rabauti layed eggs in the breeding tank & i removed the parents & added some Anti Fungus. What can i do more & any personal advice that i should know?.

Thanks alot in advance.


http://www.flickr.com/photos/corydoras/
Member of the Malta Aquarist Society - 1970.
http://www.maltaaquarist.com

If you don't have an infusoria culture running for the little guys when they hatch, get yourself a supply of Liquifry for egg layers.

Next, implement small water changes daily. Around 10% is ample.

If you have Java Moss for the babies to hide in, that will also stand them in good stead. For rearing, a temperature of around 22 degrees C is about right. If that seems low, remember that in the wild the parents spawn when several hundred thousand gallons of rainwater has dropped from the sky at an altitude of around 25,000 feet - which is the altitude that the clouds are pushed up to as they rise over the Andes! That rainwater is pretty cool, and once it starts falling, it keeps falling at regular intervals in utterly torrential downpours for six months. Where these fishes live, they get something like 300 inches of rain per year falling on them, almost all of it in the six month rainy season, during which time they're averaging two inches of rain per day ... when that lashes down onto their home waters, the rivers and pools in which the parents and the babies live drop in temperature to around 22 degrees C, which is the kind of temperature your rabauti fry will have adapted to grow at.

By the way, you are in for a shock when these babies start growing. Juvenile rabauti look NOTHING like the adults! You'll soon see why the juveniles and the adults were originally described as two different species until captive breeding highlighted the mistake!

If I were you, I'd borrow a digital camera, photograph the parents, then four weeks down the line, photograph the babies. Once you have images of the two, post them here and show everyone just HOW radically different they are!

Mind you, you'll only have a fairly narrow window of time to capture the difference before they start changing into their adult colours. During the transitional period, they'll look weird.

There must be SOME reason why they change colour so drastically,but for the moment the explanation escapes me.


Panda Catfish fan and keeper/breeder since Christmas 2002

Unless you're dealing with a tiny tank, 10% daily is excessive. Corydoras fry are more forgiving than many other genera, ime, though, of course, this depends on the species. I, for one, even in the presence of fry maintain a 25~50% weekly WC regime, and all my corydoras/aspidoras fry have been perfectly fine. First foods would either be powdered flake/carnivore pellets, if live foods of that size prove problematic to procure.

Most fry color changes are due to a difference in habitat/biotope and the need for excessive cryptic coloration in young fish.

The tank is a 29 Litre.

Shall i start doing the water changes now or when the fry hatch?.

I will take some pictures of the eggs & post them here.

It's my first time with the C.rabauti & will Live Brine Shrimp be good for them, or they need smaller foods?.

Yes, i know that they change colour, as i read about them on my Corydoras Hand Book.

Thanks alot.



http://www.flickr.com/photos/corydoras/
Member of the Malta Aquarist Society - 1970.
http://www.maltaaquarist.com

Most fry color changes are due to a difference in habitat/biotope and the need for excessive cryptic coloration in young fish.

Thing is though Cup, Corydoras rabaouti fry are anything BUT cryptic - they're a LOT brighter than the parents! Which is one reason why this particular species puzzles me - as you say, most other Corys tend to have fry that blend in well with the background (my Pandas are practically invisible against natural gravel for the first 4 weeks or so of life) but rabauti seems to toss this idea into the bin and has fry that look as if they're getting ready for a disco party in comparison!


Panda Catfish fan and keeper/breeder since Christmas 2002

I disagree. The youngest fry are relatively darkly colored with a vertical jet black stripe down the center of the fish, which slowly rescinds into the normal rabauti patterning. Not at all flashily colored, especially when you consider their area of residence; the Negro basin. Another reason I've seen flung around was that it aided in the differentiation, specially, between zygatus and the species in question, which, IMO, I don't quite get, as it is not the breeding adults that look different, but rather, the fry. Furthermore, in similar looking species of animals throughout the kingdom, nature has provided a way more efficient and precise than visual distinctioin to ensure successful mating.

Here is a picture of some of the eggs:-

http://uk.pg.photos.yahoo.com/ph/s8xi5heh/detail?.dir=6762scd&.dnm=9be9scd.jpg&.src=ph

you have to enter my pictures & find the Corydoras file, as it's giving an error.

Sorry.

http://www.flickr.com/photos/corydoras/
Member of the Malta Aquarist Society - 1970.
http://www.maltaaquarist.com

Very cool. i think regardless of the colour you will be very pleased to have some new fish. good luck and i hope your fry grow to be great fish.

Renegade545,
king of the frontosa

Yes, i will be very pleased with some new Corydoras fry, zooming around & thanks for your comments.

I read that the C.rabauti fry will have 3 colours when they are about 4 weeks old. Lets hope that i can confirm this & post some pictures.

http://www.flickr.com/photos/corydoras/
Member of the Malta Aquarist Society - 1970.
http://www.maltaaquarist.com