Allosaurs averaged one ton in adult weight

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Would this general picture also have applied to the dinosaurs? (animatronic dinosuar)In other words, were some of their habitats sufficiently favorable so that as warm-blooded predators they could attain ratios as high as 4 or 5 percent? The habitat least favorable to predatory dinosaurs would certainly have been the barren sand dunes of Outer Mongolia during the Cretaceous Period. This environment offered little cover, water was scarce, and droughts must have been severe. Plant-eaters are commonly found in these red sands, but meat-eaters are rare and mostly of small size. The total mass of predators to prey was far below 1 percent. But across the North Pacific, the Late Cretaceous habitats in Alberta were ideal for predators.(dinosaur costume) Forested deltas and floodplains provided ample cover for attacking, and the predators were very large, powerful, and nimble—adult tyrannosaurs grew to two tons, enough to attack the rhinoceros-sized duckbills and horned dinosaurs. In Alberta, the ratio of predator to prey averaged 4 percent, much higher than in Mongolia. These percentages clearly mean that tyrannosaurs were probably as warm-blooded as the saber-toothed cats and wolf-bears that took over the top predator roles many millions of years later.

 

Quite interesting as a test case was the situation during the Late Jurassic in Wyoming. Here the conditions for predators were not as trying as in the barren dunes of Mongolia nor as easy as in the densely forested deltas of Alberta. (dinosaur equipment)The conditions were inter-mediate—Morrison Formation sediments show that these habitats contained more trees than the dune fields but suffered longer dry seasons than the Alberta deltas. Allosaurus was the most common predator of the Morrison, and it didn't enjoy the same advantages tyrannosaurs would later have. Allosaurs averaged one ton in adult weight, large by modern standards, but tiny compared to the twenty and thirtyton brontosaurs. Logically, then, the rules of predator to-prey relationships derived from warm-blooded animals predict that Allosaurus would not have been able to reach as high a level as tyrannosaurs could later because they wouldn't have been able to cull their prey as effectively.(dinosaur supplier) And this prediction is justified by the evidence. The predator-to-prey ratios of the allosaurs aver-aged 1.5 percent, lower than for tyrannosaurs.

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