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Post by Grey on Jul 12, 2013 2:02:58 GMT 5
One example that size does not mean agression toward humans and others species among predators : the most agressive cetacean on the planet toward humans is not O. orca (up to 9 tons), nor Pseudorca (up to 2 tons), but Feresa attenuata, the pygmy killer whale (200 kg) : Pygmy killer whales deserve the name "killer" much more than their counterpart the killer whale. They are highly aggressive and cannot be handled. One specimen was captured off Hawaii in 1963 and sent to Sea Life Park. The day after its capture it tried to attack a man checking the water input. Ten days later it was placed in the same tank as two pilot whales. The youngest of the two was later found dead. The cause of death: a sharp blow to the cranium by the head of the pygmy killer whale.www.angelfire.com/mo2/animals1/cetacean/pygmykiller.htmlThe similar situation could be expected in fossils taxa. |
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Post by theropod on Jul 12, 2013 2:16:12 GMT 5
There is no rule that smaller or larger animals are always more agressive. it totally depends on the animal's ecology.
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Post by theropod on Jul 12, 2013 2:19:29 GMT 5
Many neovenatorids may be in just the right size range to pose a big thread to us, about the size of a saltie.
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Post by creature386 on Jul 12, 2013 15:29:49 GMT 5
There is no rule that smaller or larger animals are always more agressive. it totally depends on the animal's ecology. But smaller animals would be more interested in humans. |
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Post by theropod on Jul 12, 2013 18:46:43 GMT 5
Of course. I was talking about agression in general (because Grey was also talking about agression towards larger animals, like pilot whales).
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Derdadort
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Excavating rocks and watching birds
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Post by Derdadort on Jul 19, 2013 19:27:17 GMT 5
What about Carnotaurus?
It had relative long legs and a small skull, so it was likely more specialized on smaller prey than other big Theropods.
And when we are talking about crocodilians, we could also think about Phytosaurians. brolyeuphyfusion already mentioned Redondasaurus, which had a comparable size to Sarcosuchus or Deinosuchus. Or let's take a smaller genus like Rutiodon.
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Deleted
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Post by Deleted on Jul 19, 2013 20:27:04 GMT 5
Redondasaurus, which had a comparable size to Sarcosuchus or Deinosuchus. Nope, Redondasaurus was likely only in the range of ~6-7 meters. Not much bigger than Gustave. Likely around half the size of Deinosuchus rugosus(~2.3 tonnes at average), not even close to Sarcosuchus. nmnaturalhistory.org/redondasaurus1.html |
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Derdadort
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Excavating rocks and watching birds
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Post by Derdadort on Jul 19, 2013 20:40:41 GMT 5
It seems to be the size for this specimen. Admittedly I know data to the size of Redondasaurus only from Wikipedia so far. Are there any good sources?
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Post by theropod on Jul 19, 2013 20:43:37 GMT 5
Carnotaurus (and other abelisaurs too actually) make sense. Their skulls are pretty short and they were supposedly able to strike quickly, which should simplify catching a human. Carnotaurus was also very fast, so catching a relatively small prey item would be easier for it than for some other animals. Actually, I could imagine they excelled at hunting prey this approximate size, but were certainly also able to kill larger animals. Carnotaurus seems extremely specialized in speed (sort of a dinosaurian cheetah), while other abelisaurs weren't, so it might be different in this regard. On Redondasaurus; I used to think it was a 12m behemoth (never trust a figure you find on wiki...), but blaze had some info on it, which makes it seem it was much smaller. |
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Deleted
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Post by Deleted on Jul 19, 2013 20:57:03 GMT 5
The skull of Redondasaurus:  A: lateral view of female Redondasaurus gregorii YPM 3294 B: dorsal view of female Redondasaurus gregorii YPM 3294 C: dorsal view of adult male Redondasaurus gregorii CMNH 069727 Scale bar = ~10 centimeters I don't see this as belonging to a ~12+ meter phytosaur. |
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Derdadort
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Excavating rocks and watching birds
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Post by Derdadort on Jul 19, 2013 20:59:45 GMT 5
Okay, convinced  But where do the 12m come from? Wikipedia links to "Dinosaurs alive". Was this just a hyperbole? |
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Deleted
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Post by Deleted on Jul 19, 2013 21:11:16 GMT 5
Okay, convinced But where do the 12m come from? Wikipedia links to "Dinosaurs alive". Was this just a hyperbole? It was pure exaggeration like the ~30-meter Andesaurus and the ~25-meter Liopleurodon. |
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Post by Grey on Jul 19, 2013 22:33:48 GMT 5
25 m Liopleurodon being the most epic and popularized exageration of all times.
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Post by theropod on Jul 19, 2013 22:48:45 GMT 5
Leedsichthys was pretty extreme too.
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Post by Life on Jul 20, 2013 1:13:30 GMT 5
Some ancient sharks (including Megatoothed species) would have been very dangerous to humans. C. chubutensis and C. megalodon may have topped the list perhaps.
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