Here you have the paper: http://www.scielo.br/pdf/ni/v7n3/a16v7n3.pdf

data: 100-l tank (bottom area = 1825 cm2)
biological filter and limestone blocks for sheltering
fed once a week with commercial food for bottom fish (Alcon)
constant darkness (except during the maintenance activities)
temp: 17 ...

Hi,
(long time no visiting your very good site)

I just write to report an update needed to Ancistrus cryptophthalmus info ( http://www.planetcatfish.com/catelog/species.php?species_id=1139 ) regarding to aquarium breeding:

Reproductive behavior, development and eye regression in the cave armored ...

It seems that this has been forgotten for 3 years, but here another individual with a similar blue ring found in a LFS in A Coruña (Spain):
http://i126.photobucket.com/albums/p84/meiganalua/ancistrusazul.jpg
(the photograph is from a Spanish forum colleague)

Is it a damaged eye? is fixed the ...

Nice contribution. It seems quite clear that there are a couple, do they have the same age?
Good luck with them.

Concerning the bellies pigmentation (ok, mines are L411), I think it gets marbled with age. When I look to the first pictures I took, I saw it more white than today. Maybe males are much ...

In my opinion the coloration is not like the real L411. It is something between the L260 and L411. I can show you some Fotos next weak. L-Welse.com is down until Friday.

In fact, first question is:
1.- are #1 and #2 of the same species/kind...
2.- I'm sure that #3, #4 and the other three are ...

The fish in the net is fish #2 as young? :shock:
I can see why the store thought it was an L260.

Yes, it is. And #3 and #4 inside the tank look like true L260, with lot of black and white contrast (specially in the case of #3, another male sign?). But depending on the light conditions, stress ...

I completely agree with you Barbie (I was joking, not claiming -I know that you have a sharp eye for sexing Hyps., nice guesstimates). This is a complicated bussness: in fact sometimes I thought all of them were males, sometimes all females, sometimes a mixed group… at this time I think they are ...

Thanks again to everybody!

Regarding individual procedence:
#1 was acquired in the Valencian Fishkeeping Society in Feb 2005, it was imported at the time as 'Hypancistrus Queen arabesque II' (I think then L-list did not reach 4xx!!). It was yet a young adult (not with its current size, but ...

Plecofanatic: 1#F; 2#F; 3#M; 4#F;
Looser: 1#M; 2#M; 3#?; 4#?;
Pramirez: 1#M; 2#F; 3#?; 4#?;
Mike_Noren: 1#F; 2#F; 3#M; 4#?;
Barbie: 1#F; 2#F; 3#M; 4#F;


Barbie, it’s just an 8500 km walk to Spokane, maybe I could better go to Monte Dourado ;)

On the other hand, could a dominant female ...

although everyone seems to be ok in identifying them as L411, I see that sexing is not an easy problem...
Plecofanatic: 1#F; 2#F; 3#M; 4#F;
Looser: 1#M; 2#M; 3#?; 4#?;
Pramirez: 1#M; 2#F; 3#?; 4#?;
so no coincidences! :mrgreen:
more participants left?

Litos

PS: Pramirez, un saludo, ¡qué ...

For sexing, look to the cheeks and pectorals. Males will have noticeably swollen cheeks with very long odontodes. That's for 260's, but I imagine that it's similar for 411's. You'll have to wait for maturity to see that, though.

According to that #1 could be a male and #2 is a female ...

racoll wrote: I would say these fish are

Hypancistrus sp(l411)

rather than

Hypancistrus sp(l260)

, due to the larger size, colour and denser pattern of reticulations.

That's right, Yann said 'Monte Dourado'. I don't know if at the time if I wrongly attributed L318 instead of L411...

Thank you very much, Plecofanatic. Your opinion coincides with mine's (however, let's wait for the experts). This could explain why I have kept #1 and #2 for a couple of years without any spawning activity... maybe once #3 reaches the sexual maturity...

What about the other three little QA?

Be careful! Some of you sexed some of them in the past!

(Yann, you said some time ago there were L318 and not L260)

Hello to everybody!

Could you help me sexing my L260s?

A group picture:
http://ttt.upv.es/carguaga/acuario/QA/todos.jpg
#1 (quite nice odontal growing):
http://ttt.upv.es/carguaga/acuario/QA/1.jpg
http://ttt.upv.es/carguaga/acuario/QA/1p.jpg
http://ttt.upv.es/carguaga/acuario/QA/1pb.jpg
#2 ...

Yann,

I've been investigating and maybe they could be that 'Monte Dourado'... I have contacted my LFS, and they were imported as "Queen arabesque II", maybe this 'II' points to the possiblity of L318.


Litos

Thank you very much (I was on Christmas holydays last days, with no log-in possibilities).

So, I should conclude:

1.- The bigger one is a female.
2.- The smaller one is likely a male.

Of course, I keep them in the better conditions I can (BGA are related to low nitrate, I profited the water ...

It is not a Parancistrus, it should look like this:


(Image from atlas.drpez.org)

Litos

Could someone help me?

http://ttt.upv.es/carguaga/acuario/QA/QA_ab.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA_ab2.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA_ab3.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA_ab4.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA_a.jpg
http://ttt.upv.es ...

I hope it is a female, now I have a second one (hiopefuly a male) and just wait...

Hi,

could anyone help me to sex my L260 QA?


http://ttt.upv.es/carguaga/acuario/QA/QA1.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA2.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA3.jpg
http://ttt.upv.es/carguaga/acuario/QA/QA4.jpg

I know they are very bad images, but maybe you can get an ...