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for Shvar, V.a. hibernation info

mequinn Sep 19, 2004 07:57 PM

Hi Shvar,

Take a look at the new book on Varanoids of the World and hibernation - it will show you in 'wild' animals there is more to it than food, also M.F. Bates. 1990. V. albigularis hibernation. Herpetological Association of Africa 37:50. FYI....
and ALL African varanids do this, regularly, annually and when hardship effects them, i.e. drought, which is common in Africa; They also do this in captivity as JT has stated. And these animals, all closely related to one another behavior physiologically very similar to one another as well... consider this - taxonomy does not only mean what name it has, but how closely related they are, and similarities as well...
cheers,
mbayless

Replies (4)

vcreations Sep 19, 2004 08:44 PM

Mark, my previous post was deleted and I don't know why, but here it goes again.

You said in your post that it isn't all about food. No one here would argue with that (I don't think).

You do know the reason why 'cooling' brings about reproductive behavior don't you? feast and famine bring any recollections? But what would you add to that? I mean we all know that one, and that is true in captivity and the wild. We also know that monitors kept in feast mode will continue to breed (multiclutch). Again, what would you add?

Lastly, I haven't been able to get a few full term kimberlys to Robert yet, if you want them they are in my freezer and I can send them.

cheers, andrew

mequinn Sep 19, 2004 10:45 PM

Hi andrew,

Yes, I know about the cooling process and breeding, and all that stuff, but what I am saying is brumation can be a initiated by envrionmental factors, but it is also a natural physiological occurence African varanids do annually, both in the wild and in captivity, when animals are well cared for they will do this; unhealthy ones tend to go into a abnormal cycle and often die (not all, but some do); for V. griseus, if they are not cooled down and brumated they will surely die - no doubt about that!

Sure, I would be delighted to get a few DIE hatchlings from you...Thank you andrew,

cheers,
mbayless

vcreations Sep 19, 2004 10:52 PM

Email me your address to anowen25@aol.com

andrew

SHvar Sep 19, 2004 09:39 PM

During drought it comes done to lack of food. Cooler temps, dryer conditions, and other problems all cause one important condition, lack of availablility of food. It stands to reason that if eggs hatching is timed to the 2nd month of the rainy season it is because of the mass of available food. Also mating occurs in Albigularis during the last month of brumation if I remember, so they are not completely inactive by any stretch, they are not hibernating, the males are out searching for females in burrows and trees, this info is in the book and in papers you sent me on albigs. A V.Griseus may hibernate (Closer to the description), but the rest of African varanids dont brumate unless they have to, after all if a drought goes longer than normal they stay inactive. According to the papers and the book, as well many other sources they sit in a burrow or in a tree actively alert, eyes open head exposed to see whats going on to react to food or danger, thats not hibernation, nor is what rattlesnakes do when cold weather comes around, they go underground in mass dens very alert, very aware, and active if needed to be, just a bit slower. The only time Ive ever seen a long term inactive, unresponsive, monitor in captivity was a dieing, or very very sick monitor, or one that was shipped in the middle of winter and the heat packs are dead, as soon as they warm up they are on the go. Note, water turtles dig down a few inches to expose their shell to the sun and air, there is a reason for it, when the sun warms them up and the ambient temps are not too low even in the middle of winter they come out and are active, I see this every year in many species of turtle, snake, etc. I know that books say all of them stay under until winter is over but thats not reality, are the guys writing that stuff sometimes afraid of the cold, or weather changes?

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