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RE: Crossbreeding in Nature
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by atrox84 on October 13, 2015
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I'd personally have to believe that since most species that would be capable of hybridizing are usually going to be covered by the same antivenom, pretty much any hybrid venomous snakebite would be business as usual as far as treatment. Crofab, for example, covers both A. piscivorus and A. contortrix as well as all other North American crotalids. Another example would be Bitis rhinoceros and B. arietans, two species that are occasionally hybridized, are both covered by SAMIR South African Polyvalent. There would probably be the possibility for an especially hot snake, but the antivenom used to treat the bite wouldn't change. To start seeing actual treatment issues I'd imagine that It would have to be two species from completely opposite parts of the world, like Daboia crossed with Crotalus, which would be impossible in the first place. Just my two cents.
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RE: Crossbreeding in Nature
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by Cro on October 13, 2015
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Yes, it was Harry Butler, with the excellent TV show.
He is still around, and still advising the the Australian Government on reptile and wildlife related things.
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RE: Crossbreeding in Nature
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by Cro on October 13, 2015
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"If you ask me, a perfectly logical theory to explain how the Mojave rattlesnake came to be."
Nope, not logical at all, unless that same truck full of cobras also crashed in Florida and Georgia, LOL.
The type A venoms found in snakes found in certain regions has nothing to do with then hybridizing with cobras.
That would be the equivalent of you breeding with a cocker spaniel or something.
The type A venoms evolved because some snakes eat lizards, instead of rodents, at least while young. As they age, and get larger, some of them start eating rodents, and the venom changes to a type B venom.
And, guess what, if the rodent populations fall, and food gets scarce, those snakes will go back to producing type A venom, if they have to start feeding on lizards again, to stay alive.
Happens all over the country. Snakes feed on different critters as juveniles, and have venom to match that, and then as the food sources change, so does the venom, though some of them keep the changed venom type into adulthood.
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RE: Crossbreeding in Nature
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by atrox84 on October 14, 2015
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I don't know if my sarcasm came across, but believe me, I absolutely do not actually believe that escaped cobras bred with our native Crotalus sp and produced scutulatus. I was mearly pointing out the sheer ridiculousness of some of these "wives tales" that are floating around.
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RE: Crossbreeding in Nature
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by atrox84 on October 14, 2015
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Actually, there are neurotoxic populations of MANY different crote species; Klauberi, LepLep, O. helleri, horridus, viridis, mitchelli, tigris, O. concolor, O. abyssus, S. c. tergeminus, adamanteus, durissus, some populations of neonate atrox, and obviously scutulatus. As additional studies are performed I'm sure this list will grow to include nearly every crotalus species. Just as pattern and size can vary within a species, so can venom. This phenomenon isn't restricted to rattlesnake species either, and is being observed in venomous snakes all over the world.
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