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T-rex Couldn't Run?
Topic Started: Jul 19 2017, 03:19 PM (651 Views)
Sahara
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So this is trending on the news. I'm not an expert so I wanted to know what the Dino community over here thinks. I know I shouldn't trust pages with "lol Jurassic Park was wrong kiddies".

EDIT: Fixed the link.
Edited by Sahara, Jul 19 2017, 03:21 PM.
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stargatedalek
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I'm not slow! That's just my moe!

More or less just yet another paper about why Tyrannosaurus was probably unable to achieve a running gait.

It's interesting to have another perspective also supporting what's been generally accepted though.
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babehunter1324
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Let me copy paste a post that I made on reddit.

Quote:
 
Notice how most Tyrannosaurids (including T.rex's sister species/genus Tarbosaurus bataar) have eyes facing in a much more lateral angle than in Tyrannosaurus rex (as well as Lythronax argestes)?
Well according to several studies binocular vision is heavily correlated with nocturnal behaviour in many modern groups:

In reptiles (the study is about Mosasaurs but they used modern lizards for comparassion): http://www.tandfonline.com/doi/abs/10.1080/14772019.2015.1113447 https://www.youtube.com/watch?v=7AvgdSAwmZU

Although I'm not sure if there's any published article it is pretty easy to tell that owls have a higher degree of binocular vision than other raptorial birds.

In some mammals like rodents binocular vision is more common in nocturnal forms: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3877236/

And possibly us primates: http://www.pnas.org/content/101/27/10113.long

If you are hunting after some of the largest Ankylosaurids, Ceratopsids, Hadrosaurids and even Titanosaurs to ever evolve you would want to increase your chances as much as possible, and what better way to do that than hunting them while they're sleeping? High speed wouldn't be as important while hunting in low light conditions


Also refer to the following Duane Nash article, which, while always controversial do generally give some interesting ideas: http://antediluviansalad.blogspot.com.es/2016_09_18_archive.html
Edited by babehunter1324, Jul 19 2017, 06:19 PM.
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stargatedalek
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I'm not slow! That's just my moe!

The young are built to run, it would be interesting if the vision seems any different from the adults too.
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babehunter1324
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stargatedalek
Jul 19 2017, 08:21 PM
The young are built to run, it would be interesting if the vision seems any different from the adults too.

AFAIK binocular vision was present in T. rex throught all of it's ontogenic development, it's one of the reason why paleontologist started to suspect that individuals refered as N. lancensis where actually juvenile T. rex, until the discovery of Lythronax argestes there were no known Tyrannosaurids with a wide angle of binocular vision.

I think it's impossible to tell if ontogeny had any effect on the daily patterns of Tyrannosaurid.



Edited by babehunter1324, Jul 20 2017, 01:49 AM.
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Furka
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Well I'd assume the youngs would try to be active when the adults were not, to avoid competition or turning into food themselves, like some modern species do.
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babehunter1324
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Furka
Jul 20 2017, 02:54 AM
Well I'd assume the youngs would try to be active when the adults were not, to avoid competition or turning into food themselves, like some modern species do.
That's a possibilty, but without well preserved scleral rings and little information about the daily pattern behavior of the Lancian fauna we can only speculate :/
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Incinerox
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Āeksiot Zaldrīzoti

Meanwhile, in Brisbane:

http://www.watoday.com.au/queensland/carnivorous-dinosaurs-could-have-run-faster-than-we-originally-thought-brisbane-study-20170719-gxemmg.html
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magpiealamode
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No good hero is a one-trick phony.

Rule of Cool dictates that I must go with the theory which I think is more awesome, that being that they could run faster.
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babehunter1324
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Incinerox
Jul 20 2017, 01:23 PM
So... Basically this:

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