claudiusx":3m248b7t said:Nope cant find anything that answers the question. You're a lot better at googling than me perhaps you will have better luck. Anyways it should be easy since you've obviously read an article that stated that before since you said it so matter of factly.
Looking forward to reading the study you provide.
-Brandon
claudiusx":3tzxp0sx said:Well it was your statement not mine. I'd expect on a discussion thread where we are all trying to learn that people would actually try to contribute to that. Making a statement and then refusing to show your source and requiring others to look it up is a sign that either you're lying, or you dont actually care about helping, you just want everyone to agree without question.
Unless your purpose here isnt to contribute to anything. I don't see how you're helping. With your unverifiable statements. Of course you can feel free to change your original comment to "you believe" instead. No double standards please. You demand scientific proof and evidence from everyone who disagrees with you. Literally every time I've asked the same out of you, you retreat.
So if you don't want to contribute and help, thanks for the lack of anything useable. But please just try to mud up your own threads instead.
-Brandon
So.... your purpose on this thread is what then if you just said its up to me?kingofnobbys":3ecl8eha said:You think a bright overhead basking globe is not needed for bearded dragons , it's up to YOU to find supporting evidence
kingofnobbys":2v033i1v said:claudiusx":2v033i1v said:I have no clue what that link you posted has to do with this discussion. If you care to elaborate, feel free.
Yes thats what we were discussing. Are they positioning themselves towards to sun because of the light coming from that direction, or the heat. Or, are they simply facing away from it because who wants to stare at the sun.kingofnobbys":2v033i1v said:It's been observed that reptiles in the wild will position themselves to bask with their backs to the sun hence they are aware of the position of the sun in the sky , they also respond similarly to basking globes that produce visible light.
It would be easy enough to test I just don't have a CHE or a non light emitting heat bulb right now.
The goal is to mimic natural sunlight. The purpose of this thread is the question, does a basking bulb have to fulfill that requirement, or can general lighting in the tank do that instead.
-Brandon
They position themselves so the parietal eye is facing towards the source of light and IR flux.
... investigations showed a central role of the parietal eye in lizard orientation in the field under the sun (Ellis-Quinn and Simon, 1991; Freake, 2001). In both experiments lizards released on sunny days outside their home ranges were orientated at random when their parietal eyes were covered with a patch (T. rugosa) or painted black (S. jarrovi). A previous study in which we used the Morris water maze outdoors confirmed the central role of the parietal eye in lizard orientation under the sun (Foà et al., 2009). Since painting the parietal eye might prevent lizards from perceiving light not only by the parietal eye itself but also by the pineal and deep brain photoreceptors (Pasqualetti et al., 2003; Bertolucci and Foà, 2004), further experiments outdoors in the Morris water maze were done at that time to compare the orientation of ruin lizards whose parietal eyes were painted black with that of ruin lizards whose parietal eyes were completely ablated. As both experimental groups were randomly orientated (after the parietal was covered) in the Morris water maze, these results demonstrated for the first time that only the parietal eye, and not other brain photoreceptors, is involved in lizard orientation (Foà et al., 2009).
In the light of the present results, one is led to attribute disorientation of lizards tested under the sun with covered or ablated parietal eyes to the consequent loss of function of their sky polarization compass. However, this might not be the whole story. In fact there is some evidence that the lizard parietal eye might also mediate functioning of a sun azimuth compass.
First of all, in all the experiments cited above lizards with covered or ablated parietal eyes were disoriented in spite of the fact that the sun disc was fully visible and their lateral eyes were completely unobstructed.
Furthermore, in our previous experiments outdoors, ruin lizards were tested at midday in summer in a Morris water maze surrounded by high fences (Foà et al., 2009). In such a situation ruin lizards were allowed to see a very limited patch of sky around the zenith, at a time of day (midday) when the sunlight directly above the parietal eye is mostly unpolarized (maximum polarization occurs at an angular distance of 90 deg from the sun, and thus near the horizon during midday). All this in our opinion strongly supports the contention that the parietal eye plays a central role in mediating not only a sky polarization compass but also an azimuth sun compass.
claudiusx":30nwqwv3 said:Thank you. See that wasn't so hard, contributing is nice in a community.
However, it still doesnt mean a bright basking globe is a necessity. The study didnt answer the main question of this thread. It only substantiates your claim which didnt have much pull in the original question anyways.
-Brandon
kingofnobbys":1adgofm4 said:claudiusx":1adgofm4 said:Thank you. See that wasn't so hard, contributing is nice in a community.
However, it still doesnt mean a bright basking globe is a necessity. The study didnt answer the main question of this thread. It only substantiates your claim which didnt have much pull in the original question anyways.
-Brandon
So prove your claim IF YOU CAN with hard scientific evidence.
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