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Raised sauropod necks Re: A sauropod paper and a buttload of ornithopod ones

On Wed, 2 Jun 2010, Thomas R. Holtz, Jr. wrote:
Christian, A. 2010. Some sauropods raised their necks—evidence for high
browsing in Euhelopus zdanskyi. Biol. Lett. published online before print
June 2, 2010, doi:10.1098/rsbl.2010.0359


A very long neck that is apparently suitable for feeding at great heights is
a characteristic feature of most sauropod dinosaurs. Yet, it remains
controversial whether any sauropods actually raised their necks high.
Recently, strong physiological arguments have been put forward against the
idea of high-browsing sauropods, because of the very high blood pressure
that appears to be inevitable when the head is located several metres above
the heart. For the sauropod Euhelopus zdanskyi, however, biomechanical
evidence clearly indicates high browsing. Energy expenditure owing to high
browsing is compared with energy costs for walking a distance. It is
demonstrated for Euhelopus as well as for the much larger Brachiosaurus that
despite an increase in the metabolic rate, high browsing was worthwhile for
a sauropod if resources were far apart.

No disrespect, but isn't getting to be old news?

From May 2009

But now scientists are saying the low-necked sauropod pose is a mistake: new evidence indicates that they held their necks aloft like giraffes and all other living land vertebrates, making them up to 15 metres tall.

Dr Mike Taylor and Dr Darren Naish, of the University of Portsmouth, and Dr Matt Wedel, of Western University of Health Sciences in California, argue that while sauropods could hold their necks low, it was not their habitual posture.

Open Access: just go to