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Post by brobear on Jan 15, 2021 4:03:29 GMT -5
Quote: Minimal sexual demorphism between the sabre toothed cats. *There is more sexual dimorphism between some of the Machairodontinae than others. But yes, I have read about Smilodon fatalis having little-to-no sexual size difference. This would suggest the lack of males contesting ( fighting ) over the females.
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Post by OldGreenGrolar on Jan 15, 2021 4:59:06 GMT -5
Quote: Minimal sexual demorphism between the sabre toothed cats. *There is more sexual dimorphism between some of the Machairodontinae than others. But yes, I have read about Smilodon fatalis having little-to-no sexual size difference. This would suggest the lack of males contesting ( fighting ) over the females. So I guess you believe the smilodon might actually be less aggressive compared to bears, tigers, and lions right? The sloth bear is more aggressive than the polar bear yet the latter has a greater sexual demorphism. However, male polar bears get extremely aggressive during mating season and can fight to death while sloth bears are just defensively aggressive.
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Post by brobear on Jan 15, 2021 5:43:47 GMT -5
Quote: The sloth bear is more aggressive than the polar bear... *I would disagree with this. In fact, those biologists who have made studies on the sloth bear claim that his reputation for aggression is undeserved. There are several factors at play that would falsely make it seem as though the sloth bear is an ultra-aggressive bear. 1- the sloth bear is a noisy feeder. He sucks-up termites like a noisy vacuum cleaner. He is therefore easily taken by surprise, in which case he feels threatened. 2- Of all the living bears, the sloth bear has the poorest peripheral vision. This also causes him to be suddenly surprised. 3- Over the eons, the sloth bear has learned that his best chance of surviving a possible tiger attack is to confront his enemy. If he runs, the tiger will catch him. A tree is not always nearby and neither is he as quick as some other bears in his climbing skills. He has learned that a tiger will rarely fight a bear face-to-face. The last thing a sloth bear really wants is a fight. He much prefers a peaceful life of almost continuous eating. Edit and add: What he lacks in aggression, he makes up for in courage.
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Post by brobear on Mar 21, 2021 4:05:23 GMT -5
There is little difference between the size of a Ngandong tiger and Smilodon poplulator other than the saber-tooth's greater girth. One thing that we have learned with a certainty here at the Domain is that no cat ever kills a bear his own size or bigger. A full-grown boar polar bear could easily kill even the biggest of the big cats in no less than 8 out of 10 fights.
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Post by brobear on Mar 21, 2021 4:13:08 GMT -5
According to most reliable sources Smilodon populator reached an average weight of ~660lbs ( 300kg ). Average mature male polar bear (6 years+) - 1075 pounds ( 488 kg ). *Note: A male polar bear is not truly a full-grown bear until he is from 9 to 10 years old.
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Post by OldGreenGrolar on Mar 25, 2021 19:20:52 GMT -5
According to most reliable sources Smilodon populator reached an average weight of ~660lbs ( 300kg ). Average mature male polar bear (6 years+) - 1075 pounds ( 488 kg ). *Note: A male polar bear is not truly a full-grown bear until he is from 9 to 10 years old. A nine or ten year old male polar bear would be 1100 to 1200 pounds. A full grown male polar bear is much heavier and stronger than a male smilodon populator.
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Post by brobear on Mar 27, 2021 6:42:11 GMT -5
A recent reconstruction of Smilodon fatalis. This is the biggest species of saber-toothed cat that a grizzly would encounter.
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Post by OldGreenGrolar on Mar 27, 2021 7:35:59 GMT -5
/\ That looks like a Sabre toothed clouded leopard 😄.
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Post by OldGreenGrolar on Mar 27, 2021 7:59:48 GMT -5
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Post by brobear on Mar 30, 2021 0:20:11 GMT -5
The grizzly never encountered Smilodon populator:
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Post by King Kodiak on Mar 30, 2021 0:55:16 GMT -5
Of course not, the grizzly was never in South America.
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Post by brobear on Mar 30, 2021 1:25:13 GMT -5
Of course not, the grizzly was never in South America. And, for some reason, populator never ventured even into central America and so never set foot in Mexico ( which is as far south as the grizzly ventured ).
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Post by OldGreenGrolar on Mar 30, 2021 2:10:00 GMT -5
The smilodon fatalis could be the smaller and more northern counterpart of the smilodon populator.
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Post by brobear on Apr 16, 2021 4:07:12 GMT -5
Smilodon Populator model by "Prehistoric Fauna".Here again, the big cat falls before the might of the bear.
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Post by OldGreenGrolar on Apr 18, 2021 8:11:17 GMT -5
/\The coastal brown bear is much larger. Therefore, it is true.
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Post by brobear on May 4, 2021 3:09:02 GMT -5
www.sciencedaily.com/releases/2021/05/210503113933.htm Newly identified giant saber-toothed cat roamed North America 5-9 million years ago. A giant saber-toothed cat lived in North America between 5 million and 9 million years ago, weighing up to 900 pounds and hunting prey that likely weighed 1,000 to 2,000 pounds, scientists reported today in a new study. The newly identified cat weighed an average of around 600 or so pounds and could have managed to kill prey weighing up to 6,000 pounds, the scientists estimate, suggesting that their findings provide evidence for another giant cat, one of the largest in Earth history. "We believe these were animals that were routinely taking down bison-sized animals," said study co-author Jonathan Calede, an assistant professor of evolution, ecology and organismal biology at The Ohio State University's Marion campus. "This was by far the largest cat alive at that time." They have determined that the new species is an ancient relative of the best-known saber-toothed cat Smilodon, the famous fossil found in the La Brea Tar Pits in California that went extinct about 10,000 years ago. The largest of the seven Machairodus lahayishupup humerus fossils available for the analysis was more than 18 inches long and 1.7 inches in diameter. By comparison, the average modern adult male lion's humerus is about 13 inches long.
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Post by theundertaker45 on May 4, 2021 4:50:11 GMT -5
brobearReally nice find. The largest individual from the sample of those massive sabretooths is estimated to have weighed a whooping 427kg (~941lbs). "The body mass estimate for M. lahayishupup based on humerus circumference is very similar to the one calculated based on humerus length. A diameter of 42.4 mm yields an estimate of 427 kg. Body mass estimates for A. coloradensis and M. catocopis based on humerus circumference are much smaller (diameters of 29.6 and 34.9 mm, respectively;164 and 254 kg, respectively)."
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Post by brobear on May 7, 2021 5:53:53 GMT -5
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Post by OldGreenGrolar on May 8, 2021 8:24:25 GMT -5
Sabre toothed cat vs extinct cat with shorter canines but stronger jaws at weight parity, who wins?
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Post by brobear on May 9, 2021 5:52:12 GMT -5
Machairodus lahayishupup is basically in the weight range of an Ussuri brown bear.
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