Black rays, hybrdization, and locations. P14, BD, leos, henleii

[andersp90]

This is great news..... here I thought I had to worry about a Marble knocking up my Mantilla.... But since there is Marble males and females and only a single Mantilla (female) I no longer have to worry about her getting pregnant......



I'de like to hear what Mike has to say about this since he's actaully had the experience of hybrids.

You guys must be joking now...

30-40% of the rectis i just got in where hybrids.

And they have plenty of water and mates to choose from. So i wonder why the cross breed then................................................................................................................................................................................................................................................................

 

[JD7.62]

http://books.google.com/books?id=RT...X&oi=book_result&resnum=6&ct=result#PPA784,M1
Page 784 - Section "Tributaries"


Found a great read on all 3 river tributaries in question.. and I must say JD7.62, that you were very correct in their isolation.. many bluffs, plateaus, gorges, and rapids along each river, especially towards the mouth.. However, there are other minor streams/rivers that branch out towards each other, especially near the southern tips of the Tapajos and Xingu.. and if these areas are to be considered 'flood plains' I could definitely see these minor tributaries branching out and crossing paths.. I could see migration occurring here, not at the amazon near the mouth of each individual river system..

Again, a single specimen isolated within an entire group of other specimens would be forced to hybridize and effect the entire gene pool for many years. A single rogue male Henlei could of effected a population of Leopoldi for YEARS and now hundreds of years later we see the minor side-effects of this rogue Henlei..

I believe that migration through the mouths of each river, after reading that, is near impossible unless they become completely flooded.. and my reasoning tells me that these 'gorges' and 'ravines' being carved out by the rivers would be the product of large amounts of rising, rushing waters flowing through them.. Perhaps a byproduct of heavy rainfall and draining of the 'flood plains', therefor they never really flood near the mouths of the rivers, but more to the south in the larger open areas?

I think that is what most likely happened. I would think it would be very very rare and it would take some MAJOR flooding for the rivers to connect. Sadly unless we do DNA testing on all these rays, we will never know for sure.

Three hot girls sitting at a bar..
Asian
Mexican
Caucasian

okay wait nevermind that's off topic

Easy...take all three home!

 

[Lode]

Can you be more specific? Thousands of gallons per ray???

It was just a reaction in relation to the post from Rayfan. In the wild the amount of gallons is enormous ofcourse

But I have also heard that in realy large tanks, black rays mate mainly with black rays and vice versa.

 

[DB junkie]

I'm not buying it. And yes Anders.... Joking.

This may be true in the wild but in captivity I believe they breed period. No matter the species..... As long as they are somewhat close (like the typical hybrids)

As far as size of tank/pond I bet if it IS big enough (which 95% of us are NOT able to provide) the fact that they are partial to thier own species might be true..... For the rest of us I don't think our rays will be particular.

 

[Gr8KarmaSF]

Like "Wow I came across a female that is viable, lets bang it."..

Thread like these are discusions, NOT who's right and who's wrong.

^ AGREED ^

so, idk if this is a good place to ask this, but I was just wondering(purely out of curiosity, not intent), if oscars and rays can be housed together, and if so, what size tank for what ratio?

It would be best to start your own thread kind sir...

 

[turkeyboy85]

^ So if this is true you should be able to throw in a pair of pearls, a pair of Leos, and a pair of Marbles together in one pond and NO crossbreeding will happen ..... Correct????

My male leo chases the female leo... my male motoro.... chases the female motoro...... and yes... they are all in the same tank

 

[DB junkie]

How big is your tank?

Guess we all know who the father of your pregnant motoro is then right?

 

[turkeyboy85]

tank is 8x3x30 so roughly 370+ gallons, and im still looking at the timeline for her pregnancy .... not sure if the male motoro was mature yet or not, and the female leo wasnt in the tank at that time. all im saying is I have noticed the leos closer together and the motoros closer together then vise versa since I got the female leo

 

[DB junkie]

So maybe size of tank has NOTHING to do with the fact they prefer thier own species.........

 

[turkeyboy85]

So maybe size of tank has NOTHING to do with the fact they prefer thier own species.........

could be true.... how many people have put pairs of Known breedable
rays with other species of known breedable rays and had
crossbreeds? <- happy Miles?