tiger stingray

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JOEG - didn't know you were an ichthyologist (not being smart but looks aren't everything to a species - do you know exactly which rivers/tributaries where all your rays were caught?)

Anders - you can see the same kind of 'flower' type pattern on the back of the other ray Matt showed, though not quite as many 'flowers'.

I honestly think both of the 'tigers' pictured are the same species. But I know some of the old pictures I've seen of Tyson's tigers show a few very distinct variations that I could easily see as being different species.

http://www.monsterfishkeepers.com/forums/showthread.php?t=12228

In my eyes, there's at least two, possibly three different types of rays in his pics here that are commonly referred to as 'Tiger rays'.
 
:screwy:i can totally tell the difference between tigers and flower rays they are 2 different species imo
 
I like to keep it simple unless you can sell for more money LOL:

Flower

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Tiger

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Fishdog - that doesn't really keep it simple. The tiger you pictured shows many of the same rings/designs on it's back that are used to identify a flower. The only real difference is the lack of solid rings/flowers on the edge of the disc.

I'd probably argue that the species of 'Tiger' pictured is a schroederi, same as the flower pictured, and they're just different colour variations from different locations.
 
Could be a wild cross? What I meant was I personally don't call it a flower unless it has the flower markings extend to the disc edge. I am not a scientist so I don't have any ammo to argue the point. If I owned the last one I would call it a tiger. Seems like flowers have more of an oval disc shape verses the tigers more rounded shape.
 
African_Fever;2309255; said:
Fishdog - that doesn't really keep it simple. The tiger you pictured shows many of the same rings/designs on it's back that are used to identify a flower. The only real difference is the lack of solid rings/flowers on the edge of the disc.

I'd probably argue that the species of 'Tiger' pictured is a schroederi, same as the flower pictured, and they're just different colour variations from different locations.
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Exactly.. that will just confuse more. Most if not all of us know the difference between "tiger" and "flower" as has been established for years. Now we're decifering which of the "tigers" are now technically p. schroederi and which are true p. mech..
 
Second pic I posted (the one FishDog called "tiger") is an animal that was ID'd schoderi by the "expert speakers" at the ray symposium. I'm not going to doubt what they say since they are the ones who classify them.
 
This is my understanding after talking with the 3 Brazilian scientists that were at the symposium in August. They are all Potamotrygon schroederi. There is a picture of some of the tigers at Shedd, but they only show 2 of the 5. There is a lot of variety in the 'tiger rays' at Shedd, and we have one that looks like the one Matt (Zoodiver) posted. The Brazilians were of the opinion that they were all schroederi. There can be huge variation on how a single species looks- consider motoro. This is how I would refer to them
Potamotrygon schroederi 'Tiger Ray'
Potamotrygon schroederi 'Flower Ray'
1 species according to the scientist working with fw rays.

Potamotrygon menchacai isn't a valid species anyway, but then again, either is reticulatus and everyone uses that....

Take a look here: http://www.fishbase.de/NomenClature/ScientificNameSearchList.php
 
Whether they are all schroederi or menchancai to me they look like they have a different disc shape. Like I mentioned earlier, flowers look like they have more of an oval disk while tigers have a round disk. Look at castexi's, their are so many variants but they all have the same shape disk, the same for motoros. Maybe DNA is the only way to tell. If you go back to the original aqualog books, the pics Dr. Ross has of Schroederi look nothing like the ones in question. Just thought I would stir the pot some more LOL!
 
amazongirl;2310504; said:
This is my understanding after talking with the 3 Brazilian scientists that were at the symposium in August. They are all Potamotrygon schroederi. There is a picture of some of the tigers at Shedd, but they only show 2 of the 5. There is a lot of variety in the 'tiger rays' at Shedd, and we have one that looks like the one Matt (Zoodiver) posted. The Brazilians were of the opinion that they were all schroederi. There can be huge variation on how a single species looks- consider motoro. This is how I would refer to them
Potamotrygon schroederi 'Tiger Ray'
Potamotrygon schroederi 'Flower Ray'
1 species according to the scientist working with fw rays.

Potamotrygon menchacai isn't a valid species anyway, but then again, either is reticulatus and everyone uses that....

Take a look here: http://www.fishbase.de/NomenClature/ScientificNameSearchList.php
Click to expand...


There you go, a much better first person source of info than I am on this one.
 
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