P. magdalenae doesn't eat

[andersp90]

Well, P. reticulatus is not a valid scientific name, it's a synonym for P. orbignyi.
Although he is caught from upper Rio Magdalenae, 3 species live there, none of them is orbigny the other two is very different than this.
I've spent my last 3 weeks with reading stingray related scientific papers. I'm like 90% sure it's magdalenae.
I will post scientific references tomorrow.

I also read some interesting stuff regarding many other species, I'll collect the information at post sometimes later. There is much confusion in the hobby regarding name and localities.

Yes, reticulatus is a (junior) synonym. But it was linked to the species you have posted a long time ago - and I doubt it will change until it has been decribed by science.

P. "reticulatus" can be found all over Colombia and Venezuela in the Orinoco river delta and is one of the most common species in the hobby.

And its Rio Magdalena, not magdalenae.

It is also true that other spcies in the hobby are mislabled. Fx hystrix, scobina and castexi just to name a few.

I think its great that you have invested 3 weeks into reading potamotrygon related papers.

- but some of us have been doing that for the past 8 years+.

But you are of course very welcome to share what you have found - just dont expect it to turn the hobby upside down.

 

[pometko_n]

My deepest respect for you and all the other forum members who has been in the stingray hobby for years, but there is finite number of scientific papers and the whole set can be read in a row once you have the entire set in your hands and you do not have to wait for years until the next one if publicised. After all it does not really matter whether one started to read all of those like 10 years ago or just last month.

Ofcourse I don't want to turn the hobby upside down, but I don't understand several missbelief in the hobby, there are a lot of scientific information avaible on the internet.
Species descriptions and many other information can be found. I also know that the hobby has a certain hysteresis.

 

[pometko_n]

So, as I promised, here are the scientific references. Feel free to correct my if I missunderstood or misstaken something.

According to Javier A. Maldonado-Ocampo; Richard P. Vari; Jose Saulo Usma (2008) [1] the only Potamotrygon species can be found in the Rio Magdalena is Potamotrygon magdalenae (Duméril, 1865). Although P. orbigny can be found in Colombia [2], but in the Magdalena river system.
And I received the information from the importer that my specimen is originated from the Rio Magdalena near Barranquilla city.

In the followings paper there are picture too:
http://www.scielo.org.co/pdf/rudca/v14n2/v14n2a12.pdf
http://www.humboldt.org.co/download/andes/IAVH-00487.pdf

The species P. magdalennae is still valid, it was also revalidated not long ago (I don’t find the paper anymore, but I’m it, I read it today, but don’t know where..).
Given the information I found I am more than 90% sure, it is a magdalenae, although if anyone has other (scientific) information it is welcome and I will revise my opnion.
If you would like I can cite more papers about the species. But it will take some time to gather all the relevant ones.

In the followings paper there are picture too:
http://www.scielo.org.co/pdf/rudca/v14n2/v14n2a12.pdf (page 113)
http://www.humboldt.org.co/download/andes/IAVH-00487.pdf (page 3)

List of references cited:
(1) Checklist of the Freshwater Fishes of Colombia - Javier A. Maldonado-Ocampo'; Richard P. Vari^; Jose Saulo Usma'
URL: http://si-pddr.si.edu/jspui/bitstre...Checklist_of_fresh_water_fish_of_Colombia.pdf

(2) TIBURONES Y RAYAS DE COLOMBIA (PISCES ELASMOBRANCHII): LISTA ACTUALIZADA, REVISADA Y COMENTADA - Paola A. Mejía-Falla, Andrés F. Navia, Luz M. Mejía-Ladino, Arturo Acero P. y Efraín A. Rubio 8 (2007)
URL: http://www.scielo.org.co/pdf/mar/v36n1/v36n1a06.pdf

Norbert

 

[MonsterMinis]

reguardles of the species.. that ray looks nothing like my 3 retics.. or any of the hundreds of retics i've seen over the years... you guys over-seas must get some odder ones in. btw i noticed you said the TDS was 900ppm... ime my retics do best in less then 300tds and ideally even lower. Over 300 and they started being "off" PH/temp ect doesn't phase them much as long as its in reasonable perameters and/or swings. This may have been the initial feeding strike trigger.

 

[pometko_n]

I dont say it's any special, i just judged based on the avaible info. Regardless of what species is it i love him. And yes now it's 300ppm and he is doing fine, he is active and eats like crazy.

Sent from my WT19i using Tapatalk App

 

[andersp90]

So, as I promised, here are the scientific references. Feel free to correct my if I missunderstood or misstaken something.

According to Javier A. Maldonado-Ocampo; Richard P. Vari; Jose Saulo Usma (2008) [1] the only Potamotrygon species can be found in the Rio Magdalena is Potamotrygon magdalenae (Duméril, 1865). Although P. orbigny can be found in Colombia [2], but in the Magdalena river system.
And I received the information from the importer that my specimen is originated from the Rio Magdalena near Barranquilla city.

In the followings paper there are picture too:
http://www.scielo.org.co/pdf/rudca/v14n2/v14n2a12.pdf
http://www.humboldt.org.co/download/andes/IAVH-00487.pdf

The species P. magdalennae is still valid, it was also revalidated not long ago (I don’t find the paper anymore, but I’m it, I read it today, but don’t know where..).
Given the information I found I am more than 90% sure, it is a magdalenae, although if anyone has other (scientific) information it is welcome and I will revise my opnion.
If you would like I can cite more papers about the species. But it will take some time to gather all the relevant ones.

In the followings paper there are picture too:
http://www.scielo.org.co/pdf/rudca/v14n2/v14n2a12.pdf (page 113)
http://www.humboldt.org.co/download/andes/IAVH-00487.pdf (page 3)

List of references cited:
(1) Checklist of the Freshwater Fishes of Colombia - Javier A. Maldonado-Ocampo'; Richard P. Vari^; Jose Saulo Usma'
URL: http://si-pddr.si.edu/jspui/bitstre...Checklist_of_fresh_water_fish_of_Colombia.pdf

(2) TIBURONES Y RAYAS DE COLOMBIA (PISCES ELASMOBRANCHII): LISTA ACTUALIZADA, REVISADA Y COMENTADA - Paola A. Mejía-Falla, Andrés F. Navia, Luz M. Mejía-Ladino, Arturo Acero P. y Efraín A. Rubio 8 (2007)
URL: http://www.scielo.org.co/pdf/mar/v36n1/v36n1a06.pdf

Norbert

Very nice!

Looks like you could indeed be correct (im 99% your right).

How did you find them?

Im very surprised that this one has gotten under my nose (the papers)!

That has to be the most interesting post on this forum in a very very long time.

 

[ShadowStryder]

Congrats on acquiring a rarely found species. Doesn't resemble a retic at all pattern wise. Cant wait to see updates on this as it matures. Haven't read all the papers you linked but does it state a max size?
I am assuming you were only able to acquire this single male specimen?

 

[andersp90]

Congrats on aquiring a rarely found species. Doesnt resemble a retic at all. Cant wait to updates on this as it matures. Havent read all the papers you linked but does it state a max size?
I am assuming you were only able to aquire this single male specimen?

You are misunderstanding.

Reticulatus is mislabeled, and has been from the start, just like scobina, hystrix and castexi.

These papers show that the fish we know as P. reticulatus is actually P. magdalenae.

Which is fantastic!

 

[ShadowStryder]

You are misunderstanding.

Reticulatus is mislabeled, and has been from the start, just like scobina, hystrix and castexi.

These papers show that the fish we know as P. reticulatus is actually P. magdalenae.

Which is fantastic!

Gotcha, not misunderstanding now.

 

[pometko_n]

Gotcha, actually the name reticulatus could be replaced with "something" IMHO. Most of the retics are actually orbigny, some are how know what other species, and I can imagine that some unidentified species are also sold as reticulatus.