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| Orca (Killer Whale) v Deinosuchus rugosus | |
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| Tweet Topic Started: May 5 2012, 11:04 PM (16,430 Views) | |
| Taipan | May 5 2012, 11:04 PM Post #1 |
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Orca (Killer Whale) - Orcinus orca he killer whale (Orcinus orca), commonly referred to as the orca whale or orca, and less commonly as the blackfish, is a toothed whale belonging to the oceanic dolphin family. Killer whales are found in all oceans, from the frigid Arctic and Antarctic regions to tropical seas. Killer whales as a species have a diverse diet, although individual populations often specialize in particular types of prey. Some feed exclusively on fish, while others hunt marine mammals such as sea lions, seals, walruses and even large whales. Killer whales are regarded as apex predators, lacking natural predators. Killer whales distinctively bear a black back, white chest and sides, and a white patch above and behind the eye. Killer whales have a heavy and robust body with a large dorsal fin up to 2 metres (6.6 ft) tall. Behind the fin, they have a dark grey "saddle patch" across the back. Antarctic killer whales may have pale grey to nearly white backs. Adult killer whales are very distinctive and are not usually confused with any other sea creature. The killer whale's teeth are very strong and covered in enamel. Its jaws are a powerful gripping apparatus, as the upper teeth fall into the gaps between the lower teeth when the mouth is closed. The front teeth are inclined slightly forward and outward, thus allowing the killer whale to withstand powerful jerking movements from its prey while the middle and back teeth hold it firmly in place. Killer whales are the largest extant members of the dolphin family. Males typically range from 6 to 8 metres (20–26 ft) long and weigh in excess of 6 tonnes (5.9 long tons; 6.6 short tons). Females are smaller, generally ranging from 5 to 7 metres (16–23 ft) and weighing about 3 to 4 tonnes (3.0 to 3.9 long tons; 3.3 to 4.4 short tons). The largest male killer whale on record was 9.8 metres (32 ft), weighing over 10 tonnes (9.8 long tons; 11 short tons), while the largest female was 8.5 metres (28 ft), weighing 7.5 tonnes (7.4 long tons; 8.3 short tons). ![]() Deinosuchus rugosus Deinosuchus is an extinct genus related to the alligator that lived 73 to 80 Ma (million years ago), during the late Cretaceous period. The name translates as "terrible crocodile" and is derived from the Greek deinos (δεινός), "terrible", and soukhos (σοῦχος), "crocodile". The first remains were discovered in North Carolina (United States) in the 1850s; the genus was named and described in 1909. Additional fragments were discovered in the 1940s and were later incorporated into an influential, though inaccurate, skull reconstruction at the American Museum of Natural History. Knowledge of Deinosuchus remains incomplete, but better cranial material found in recent years has expanded scientific understanding of this massive predator. Although Deinosuchus was far larger than any modern crocodile or alligator—measuring up to 12 m (39 ft) and weighing up to 8.5 metric tons (9.4 short tons)—in overall appearance it was fairly similar to its smaller relatives. It had large, robust teeth that were built for crushing, and its back was covered with thick hemispherical osteoderms. One study indicates that Deinosuchus may have lived for up to 50 years, growing at a rate similar to that of modern crocodilians, but maintaining this growth over a much longer period of time. Deinosuchus was probably capable of killing and eating large dinosaurs. It may have also fed upon sea turtles, fish, and other aquatic and terrestrial prey. ![]() __________________________________________________________________________
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| Elephantus | Jul 9 2012, 07:42 AM Post #16 |
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Tusker
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No, in tooth and jaw structure it resembled crocodiles more then alligators. Only the braincase is more alligator like, hence why it is classified as an alligatoroid. |
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| DinosaurMichael | Jul 9 2012, 07:46 AM Post #17 |
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Apex Predator
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Well that's what they say anyway that it was an Alligator. |
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| theropod | Jul 9 2012, 07:14 PM Post #18 |
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palaeontology, open source and survival enthusiast
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crocodile refers to all crocodilomorpha as well as only to true crocodiles |
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| Superpredator | Jul 9 2012, 07:31 PM Post #19 |
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Apex Predator
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Intelligence does play a role, not a major role but a minor role. E.g. If the fight takes place in deep water, the Orca can swim around knowing it is faster and can stay down longer than its adversary. It can see that the underbelly is softer than the normal skin and exploit it. Back to the fight, in shallow or medium water, Deinosuchus wins. The Orca was likely designed to swim around in the deep sea with ease. Like most Sharks, shallow water is much too, well, shallow. Combine this with the Crocodillians bite, armour, hard to exploit weakness and speed in water,(in shallow-medium water) the Deinosuchus wins in shallow-medium water. In deep water, however, it's another story, There, the Orca wins. It's speed, intelligence, longer breath-holding ability and power give it the edge. It can just swim to the deep an wait for the Deinosuchus to finally go up to breath. At that time it could realise that the best place to strike is the underbelly and strike it and kill the Deinosuchus. Basically, it depends where this takes place. Shallow-medium water, Deinosuchus wins. Deep water, Orca wins. |
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| Jinfengopteryx | Jul 9 2012, 07:46 PM Post #20 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Longer breath holding?!?!?!?!??! Large crocodiles can hold their breath mor ethan an hour, so deino should be able to hold it for 2 hours, because it's much bigger than recent crocs(bigger animals usually can hold the breath longer), while dolphins usually can hold their breath only for 15 minutes!! |
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| Superpredator | Jul 9 2012, 07:48 PM Post #21 |
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Apex Predator
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Well, Orcas live in the sea and Deinosuchus probably lived in rivers. I expect the Orca too have longer breath holding. If I'm wrong, I apologize. |
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| DinosaurMichael | Jul 9 2012, 08:47 PM Post #22 |
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Apex Predator
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It's my opinion but I just don't think it does. Animals only fight with instincts. Edited by DinosaurMichael, Jul 9 2012, 08:51 PM.
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| Elosha11 | Jul 9 2012, 08:50 PM Post #23 |
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Herbivore
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I slightly favor the Deinosochus. At its maximum size, it would have the gape and bite power to deal with the orca's bulkiness. While there's no question that the orca would be faster and more maneuverable in deep water, Deinoschus could lash out whenever the orca got close, faster than the orca could get away. And if the orca ever actually attempted to bite, even the underbelly, it would subject itself to the risk of the crocidilian's counterbite, which would do more serious injury in my opinion. However, if the orca could wear out Deinosochus, it could take this fight too. Deinosochus 55/100.
Edited by Elosha11, Jul 10 2012, 12:02 AM.
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| DinosaurMichael | Jul 9 2012, 09:10 PM Post #24 |
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Apex Predator
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I realize now. Thanks for saying that. |
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| Jinfengopteryx | Jul 9 2012, 11:34 PM Post #25 |
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Aspiring paleontologist, science enthusiast and armchair speculative fiction/evolution writer
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Still, some crocodiles can hold their breath a lot longer than marine mammals. They're exotherm, so they waste less energy. With other words, it's logical. |
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| yigit05 | Sep 5 2012, 12:35 AM Post #26 |
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Kleptoparasite
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deinosuchus wins stronger bite,size avantage,weight |
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| theropod | Sep 5 2012, 12:56 AM Post #27 |
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palaeontology, open source and survival enthusiast
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stronger bite: maybe Size advantage, weight: only lenghwise, and a large bull orca has actually a 2t weight advantage over Deinosuchus (the larger form, not the whimpy 3,5t version) |
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| DinosaurMichael | Sep 5 2012, 12:59 AM Post #28 |
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Apex Predator
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The Deinosuchus that were 3 tons were the eastern populations. The ones in the west were on average bigger. We should use the western Deinosuchus to make this a more fair fight. Edited by DinosaurMichael, Sep 5 2012, 01:00 AM.
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| theropod | Sep 5 2012, 01:00 AM Post #29 |
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palaeontology, open source and survival enthusiast
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Exactly. The western form is D. rugosus and the eastern missisipiensis, isn´t it? |
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| DinosaurMichael | Sep 5 2012, 01:02 AM Post #30 |
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Apex Predator
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You're correct about rugosus, but the other is missisipiensis? I thought the ones in the east were D. riograndensis? Aren't there only 2 species of Deinosuchus? I think your're confusing Deinosuchus riograndensis for Alligator mississipensis. Edited by DinosaurMichael, Sep 5 2012, 01:06 AM.
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