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[quote author=Vertigo link=msg=1878178 date=1394837485]
[quote author=Xenodog link=topic=19454.msg1877779#msg1877779 date=1394794337][quote author=Vertigo link=topic=19454.msg1877401#msg1877401 date=1394758293]
With regards to rexy's ecosystem, it did contain a wide variety of herbivores, but most importantly, vast herds of elephant-sized animals (both ceratopsians and hadrosaurs). Because Tyrannosaurus' growth exploded during late adolescence, they'd have to be virtually adult before they could tackle mature examples of those herbivores - a ten-year-old rex probably didn't have the mass or musculature to take them on.
[/quote]
Though haven't there been arguments for possible pack hunting in young rexes? And don''t forget young animals. Juvenile hadrosaurs or ceratopsians would certainly be a large meal - far bigger than struthiomimus  - and yet not out the reach of a young rex.
But again, this is just playing ideas, I'm not serious on adult rex being scavengers!
But thinking about it, taking young prey may provide ecological separation between juvenile and adult rexes to reduce competition that could lead to cannibalism; modern predators today take different ages classes of common herbivores to avoid competition. The different age groups of Rexes could almost act as an entire predator guild itself.[/quote]

Yeah, I did think about the potential with pack hunting when I was writing my last post. Trouble is, pack hunting is virtually impossible to prove - pretty much the only thing that can do it conclusively is an extraordinary set of footprints. We aren't even certain about Deinonychus' pack hunting, even though it seems obvious given the frequency with which numerous teeth are found in association with the vastly larger ornithopod Tenontosaurus.
My view is, looking at the relationships between big game hunters and their prey, the ideal target tends to be roughly in the region of the weight (or combined weight) of the hunters. This makes sure there's enough to go around. Tyrannosaurus reached a size equivalent to an adult Struthiomimus at just a few years old, so it seems there wasn't a particular need for them to combine arms.

The argument for pack hunting in tyrannosaurids is mainly resting on a fossil site which appears to preserve a 'pride' of Albertosaurus; numerous individuals of wildly varying ages. Currie's even suggested the possibility of the whole family hunting together, with the fast youngsters flushing prey towards the adults.
It's not really a theory I support. Social groups don't necessarily infer group [i]hunting[/i]. A good example of this is the great white shark, which in many ways (despite a wholly different environment) is quite analogous to Tyrannosaurus - immensely potent battery of senses, excessive musculature, hunting strategy focused on inflicting massive tissue loss and shock in a single bite. Great whites often travel together, and form groups segregated by age or gender, but they always hunt alone.
My opinion is that Tyrannosaurus (or Albertosaurus at least) formed family groups, with each individual making kills separately. The advantage for the adults would be that having their offspring within their territory, they could protect them against rival adults. Using their extraordinary sense of smell, they could all converge back together when one of them made a kill. Just a theory, anyway.

[quote author=DoomRulz link=topic=19454.msg1877786#msg1877786 date=1394796145]... Jack Horner who seemed (as he does now) hell-bent on proving T.Rex just couldn't have been a hunter, end of story. You'd think they guy's lawyer was eaten by a T.Rex and he has a personal vendetta or something.[/quote]

I think Horner's problem is that he's particularly fond of ceratopsians and hadrosaurs, and doesn't take too kindly to anything that saw them as walking lunchboxes.

[quote author=DoomRulz link=topic=19454.msg1877786#msg1877786 date=1394796145]
I don't know about juveniles specifically, but I have read about T.Rex in general hunting in packs. I'm not sure I agree because the only animal that shared T.Rex's environment that would warrant pack hunting is Alamosaurus. There's also been speculation by Thomas Holtz of the University of Maryland that T.Rex may have only hunted juvies because the adults were simply too big to go after. In this instance, it's hypothesized that Alamosaurus reached Sauroposeidon proportions. For an animal like T.Rex, when you have ceratopsians and hadrosaurids running about, there's no reason to go after something that big.
[/quote]

It wouldn't surprise me if nothing touched Alamosaurus once they reached a certain size. It took them many years to reach adulthood (I've read 45 for full size), during most of which they'd be fair game for rexes of various ages. I'd imagine a tiny percentage of them would reach maturity.
[/quote]

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Posted by Immortan Jonesy

- May 01, 2024, 08:34:25 PM

Posted by Immortan Jonesy

- Apr 30, 2024, 07:24:28 PM

https://twitter.com/SmithsonianMag/status/1785082385404436660

Posted by Immortan Jonesy

- Apr 30, 2024, 01:58:38 AM

Posted by Immortan Jonesy

- Apr 28, 2024, 03:14:04 AM

https://twitter.com/DStyles0510/status/1781504516237430954

Posted by Immortan Jonesy

- Apr 27, 2024, 11:47:23 PM

Posted by Immortan Jonesy

- Apr 26, 2024, 12:56:50 AM

I recently watched this Netflix documentary series. There are some paleontological inaccuracies, and too little footage of dinosaurs or prehistoric animals and too much footage of modern animals. It doesn't have much academic value though. Definitely inferior to Prehistoric Planet. What is great is that the CGI is of the same quality

~ Well, here is a video that better explains the shortcomings of the show

👎

https://twitter.com/IFLScience/status/1783526384846897606

https://twitter.com/ScienceAlert/status/1782987379130663354

https://twitter.com/SmithsonianMag/status/1783636358830940634

Posted by Immortan Jonesy

- Apr 21, 2024, 10:15:41 PM

Posted by Immortan Jonesy

- Apr 19, 2024, 01:38:23 PM

https://twitter.com/BBCNews/status/1780657696686878939

Posted by Immortan Jonesy

- Apr 18, 2024, 07:13:55 PM

Quote from: Shinawi on Apr 18, 2024, 04:50:38 AMhttps://www.youtube.com/watch?v=PDMIFXW5QB0
https://www.youtube.com/watch?v=HqAhrF5CBlo

Ty! 4 tha news 😅

Posted by Shinawi

- Apr 18, 2024, 04:50:38 AM

Posted by Thatguy2068

- Apr 13, 2024, 10:33:39 PM

Quote from: Effectz on Apr 13, 2024, 10:25:07 PM
Quote from: Thatguy2068 on Apr 13, 2024, 10:09:28 PM
Quote from: Effectz on Apr 13, 2024, 10:08:36 PMDinosaurs grew big and fast
https://cosmosmagazine.com/history/palaeontology/triassic-dinosaur-grew-fast/
Can they be trainable as pets?

Only if you're Owen grady and you wanna drive through the jungle on a dirt bike but I've played Ark a few times.i like to trap people and make them eat their own dung.
Good times

I did play ark once and i did tame a velociraptor right before giant dinosaur came in and f**ked up my shit. Never came back

Posted by Effectz

- Apr 13, 2024, 10:25:07 PM

Quote from: Thatguy2068 on Apr 13, 2024, 10:09:28 PM
Quote from: Effectz on Apr 13, 2024, 10:08:36 PMDinosaurs grew big and fast
https://cosmosmagazine.com/history/palaeontology/triassic-dinosaur-grew-fast/
Can they be trainable as pets?

Only if you're Owen grady and you wanna drive through the jungle on a dirt bike but I've played Ark a few times.i like to trap people and make them eat their own dung.
Good times

Posted by Thatguy2068

- Apr 13, 2024, 10:09:28 PM

Quote from: Effectz on Apr 13, 2024, 10:08:36 PMDinosaurs grew big and fast
https://cosmosmagazine.com/history/palaeontology/triassic-dinosaur-grew-fast/

Can they be trainable as pets?

Posted by Effectz

- Apr 13, 2024, 10:08:36 PM

Dinosaurs grew big and fast
https://cosmosmagazine.com/history/palaeontology/triassic-dinosaur-grew-fast/

Posted by Shinawi

- Apr 12, 2024, 04:30:55 PM