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I agree with KenL. Keep trying with parents or female alone. If still unsuccessful - and the eggs appear fertile - then treat them like angelfish eggs when artificially hatching. My guess right now is that there is something in or around the tank that disturbs the fish.
If you read topics on this site concerning mixing apisto pairs and mixing apisto pairs in a community setting you will find that most experienced apisto keepers consider this a bad idea.
Poor advice IMHO. Fry feed and grow much better under the care of their mother.
Exactly
Again, poor advice IMHO. Topping off a tank only concentrates the pollutants and water hardness.
This I accept if only the roots are in the tank, sort of like hydroponic gardening.
The vents (anus) are the same on both sexes. It's the genital papilla that are different. On males it is small and pointed. On females it is larger and blunt (ovipositor). This is common to all Chilasomines. Sadly these are most pronounced when the fish are about to breed.
Appears that you have one very rogue fish there. They do occur. I knew someone who had a Silver-tip tetra (Hasemania nana) that forced every fish in a 5'/1.5m tank into about 1'/30cm side of the tank. You do know that Lebiasinidae (pencilfish and related genera) are related to predatory...
I've had 4 year old apistos produce fry. Yes, I was very surprised. I have a 3 year old 'pair' of A. wolli right now and I think they are in the mood if not got eggs/fry. This is one reason that I regularly feed live bbs regularly. You never know.
What Frank wrote. I wouldn't be certain unless I collected them myself from the Quebrada Paucaryacu, in the Middle Río Ampiyacu. I wonder if it is still cocaine country and not safe to enter??
No, new blood in all of that time. In 2012 I collected and brought home 3 specimens of each sex. I got 2 breeding pairs and a lot of offspring. These were crossed with the 2 unpaired fish and with different broods. All bred true to the wild form for about 6 generations (~5 years). Then I would...
Lovely photos. Other than fewer bands in the caudal fin, it looks just like A. cf. resticulosa Mamore Blue (oriiginally imported as A. sp. Malome in the 1990s). They are both found in the same area of the Lower Rio Mamore around Guajará-Mirim on the Brazil/Bolivia border.
It is a species of the orgeagi-subcomplex but I have my doubts that they are the true A. orteagai. I'd be more comfortable about an ID if I could see more photos of the female in dominance or brood dress, or even of the male showing a stress pattern.
How funny. My A. wolli, which I've been keeping and breeding since I brought the species back from Peru in 2012, are always out in front. Not really beggars but always ignore me and go about their business.
Yes and no. It was seen as a population of A. uaupesi - A156 (as the Bork photo in DATZ Sonderheft/Special Publication). It is also considered to be the same as A. sp. D42 and possibly the same as A. sp D44.