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Re: What did Spinosaurus eat? New species of Lepidotes found
The oxygen isotope ratios for _Spinosaurus_ indicate that the body
was immersed much of the time. Immersion in water reduces aerial
evaporation and therefore decreases enrichment of 18-oxygen in body
If it stood in water a lot, it was able to drink any time it wanted; and
its food came from freshwater, too. Finally, how much water evaporates
through sauropsid skin, and how much enters it by osmosis when a
sauropsid is immersed?
In total, I don't see a reason to expect different oxygen isotope ratios
in spinosaurs and aquatic or semiaquatic crocodiles, unless metabolism
has an influence (which, apparently, it doesn't).
I'll reply to the biomechanics stuff later, I must urgently finish a