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Re: Mesozoic biomass
>Does that also mean that the range of the predators increased by a similar
>factor? If I remember correctly, solitary predators like tigers have a range
>of around 25 sq miles (sometimes up to 100) while group predators like lions
>(and tyrannosaurs?) have ranges of 100 to 200 square miles.
>( A quick Google search on "tiger range sq mi" and "lion range sq mi"
>reveals that estimates of range vary wildly, with figures as high as 4000
>sq. mi reported for lions -- depending on prey density).
>So what would the range of a pack of tyrannosaurs have been? Surely at
>least 1000 sq mi ... or does it depend entirely on prey density, which in
>turn depends on available biomass?
Depends very largely on prey density, and also possibly different food
requirements, depending on metabolism. It also depends on the efficiency of
beast as a predator. Big cats usually kill one time out of ten hunting
if my memory serves me. If tyrannosaurs were better (or worse), their range
could have been relatively bigger or smaller. That's a lot of things we don't
know much about, unfortunately, even about living species, as you pointed