Is this Hypostomus margaritifer???

[BlackSouL]

Me gustaría estar seguro de su identidad...
I would be sure of their identity...

[Bas Pels]

Where did you catch this fish? I think it is Argentinian, and you collected it yourself?

¿De donde es este pez? Creo es de Argentina, ¿y usted lo recogió usted mismo?

[MatsP]

Looks like H. margaritifier - and there aren't that many other large ones that have those colours and that sort of dorsal fin.

--
Mats

[Birger]

If the ID is correct would you consider letting those good pictures go into the Cat-eLog?

Birger

[BlackSouL]

Where did you catch this fish? I think it is Argentinian, and you collected it yourself?

¿De donde es este pez? Creo es de Argentina, ¿y usted lo recogió usted mismo?

No lo capturé yo, pero fue capturado en el río Paraná...
I do not catch it, but was captured on the Parana River ...

[BlackSouL]

If the ID is correct would you consider letting those good pictures go into the Cat-eLog?

Birger

Yes, if the ID is corret I haven't problem that the pictures go into Cat-eLog...

[husky_jim]

I believe that it is indeed

Hypostomus margaritifer

[BlackSouL]

Here are other picture...

[Jools]

Looks like H. margaritifier - and there aren't that many other large ones that have those colours and that sort of dorsal fin.

Well, there are about five, so I think we need a bit more info as while none of them are common imports, I don't think this fish has been exported, so it could be anything!

The size of the dorsal fin in a smaller fish like this one is tricky to gauge. In the head on shot this individual looks slender and so I'd put my guess at

Hypostomus regani

although it could well be

Hypostomus margaritifer

.

Which river is it from? That'd narrow it down to (probably) a couple of species.

Jools

[MatsP]

H. regani is indeed another options - which is also in the same general distribution (La Plata basin).

--
Mats

[Jools]

Mod edit: Changed post title from being UPPER CASE - please don't do this.

http://www.planetcatfish.com/forum/view ... hp?f=1&t=1

Jools

[BlackSouL]

Looks like H. margaritifier - and there aren't that many other large ones that have those colours and that sort of dorsal fin.

Well, there are about five, so I think we need a bit more info as while none of them are common imports, I don't think this fish has been exported, so it could be anything!

The size of the dorsal fin in a smaller fish like this one is tricky to gauge. In the head on shot this individual looks slender and so I'd put my guess at

Hypostomus regani

although it could well be

Hypostomus margaritifer

.

Which river is it from? That'd narrow it down to (probably) a couple of species.

Jools

Fue capturado en el río Paraná, Provincia de Corrientes
He was captured in the Paraná River, Corrientes Province

[MatsP]

Do you know which part of the Parana river?

--
Mats

[BlackSouL]

Do you know which part of the [bofw]Paraná[/bofw] river?

--
Mats

En la zona donde se unen con el río Paraguay
In the area where it joins with the Paraguay River

[medaka]

One thing to throw into the mix here, regarding catchment area.

H margaritifer and H regani was seperated by waterfalls along the river Parana, with H margaritifer being found above the falls and H regani below; however, In the later half of the last century due to water courses being changed by man, it may well be that the two species are now interbreeding.

[BlackSouL]

One thing to throw into the mix here, regarding catchment area.

H margaritifer and H regani was seperated by waterfalls along the river Parana, with H margaritifer being found above the falls and H regani below; however, In the later half of the last century due to water courses being changed by man, it may well be that the two species are now interbreeding.

¿Piensas que este ejemplar es un híbrido?
Do you think this one is a hybrid?

[medaka]

Do you think this one is a hybrid?

I don't know how one would tell?

[medaka]

DoH!

I thought I was overlooking something.

Part of the answer was there to see, in this:

He was captured in the Paraná River, Corrientes Province

As we know the Paraná River runs through Brazil, Paraguay and Argentina. H margaritifer comes from the 'Upper Paraná River' drainage in Brazil. Your specimen, you say comes from the Paraná River in the Corrientes Province of Argentina.
IMHO Even with the interference by man regarding altering the Paraná River course in Brazil; I would hazzard a guess that as yet any hybridisation between H margaritifer and H regani or hybrids of such have yet to get as far as Argentina; and it may well be that H margaritifer does not adapt well to the cooler temperatures of the Argentine Paraná River and therefore I think it would be safe to rule out your fish as being H margaritifer.

[MatsP]

So, I take it your conclusion is that it's H. regani then, Mr. Taylor?

--
Mats

[medaka]

So, I take it your conclusion is that it's H. regani then, Mr. Taylor?

Hi Mats

I think that the catfish in question is more likely to be H regani than H margaritifer.

[Jools]

For the morphological reasons I suggested above, and the fact I've seen these fishes side by side, I'd also go with H. regani.

Jools

[BlackSouL]

Entonces el ejemplar que poseo es un H. Regani.
Gracias a todos por la ayuda

Then the one I have is a H. Regani.
Thank you all for the help

¿Como hago para que las fotos figuren en el Cat-eLog?
How do I make pictures appear in the Cat-eLog?

[Birger]

¿Como hago para que las fotos figuren en el Cat-eLog?
How do I make pictures appear in the Cat-eLog?

PM sent

Birger