12-04-2013, 10:55 PM | #11 |
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And how often do you supplement with D3 if not providing UV?
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12-04-2013, 11:20 PM | #12 |
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Just done a (very brief) bit of research and it seems that tyrosinase activity would tend to decrease at approx 37 °C, therefore melanin production would probably be inhibited, so I guess torts kept at higher temps than this might show effects with regards to colouring.
Last edited by Lisamn; 12-04-2013 at 11:40 PM. |
13-04-2013, 12:25 AM | #13 | |
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I have to disagree with you on the calcium content in the keritin layer of the shell. I believe that is how the shell gets it's white color... why a Sulcata lightens up... the source of the those squiggly lines that so many keepers or concerned when the keritin layer takes up calcium. I would think the calcium would add hardness to the keratin layer of the shell... which is why I believe the scutes become brittle and less plyable as they develope.
Sorry I don't know the mechanism... but... there is a change to the structure of the scutes on the shell that I believe is the uptake of calcium. I think we could have a better conversation if you could dumb it down a little. It seems like you are trying to impress more than properly communicate. I hope you don't take offense at this. I'll admit that I'm really ignorant when it comes to the vocabulary you are using and I have an AS degree in biology along with priding myself in having an extensive herp library... not to mention access to the internet. I get the feeling you are trying to say some neat stuff... I'm not getting it all without breaking out the books or researching every other sentence.... and I don't have time for that until Tuesday. Quote:
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13-04-2013, 12:32 AM | #14 |
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What's he saying please?
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13-04-2013, 01:08 AM | #15 |
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Hopefully he is not insulted by my request to dumb it down because it does look interesting and a source of interesting debate.
I think I got the gist of it but can't respond in like fashion without looking up exactly what he's saying. There's alot of jargon that I recognise which is derived from lizard and snake breeding that I see when discussing color morphs... I kinda tune it out when I get to that level... that which I don't understand.
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13-04-2013, 09:17 AM | #16 |
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I understand the tyrosinase/heat stuff (I think) and how it could possibly alter shell colouring (after doing a bit of my own reading). Like EJ though, will have to go and do a bit more reading to get a better handle on the keratin/calcium point.
PS - do you, or anyone else reading this thread, know what RF marbling is? |
13-04-2013, 09:52 AM | #17 | |
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Cherryhead tortoises are capable of develping a leopard like pattern on the shell. It is most evident on the plastron. This pattern is the most distinguishing character feature of the Cherryhead Red Footed tortoises.
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13-04-2013, 10:32 AM | #18 |
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Annoyingly I'm not allowed to post links to other forums but here are pics of two very high marbled cherry.
The keeper is American and I believe has a website called the tortoisecove. He has some stunning torts including hypo redfoots.
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13-04-2013, 03:12 PM | #19 | |
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Quote:
And thanks to Flintus for the pics. |
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13-04-2013, 07:48 PM | #20 |
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What are the conditions under which they are kept. You can increase the red by feeding foods high in beta carotene.
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