[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: sauropod lung collapse
On Wed, 11 Jan 2006, MICHAEL HABIB wrote:
...it seems unlikely that a
coming from say, a flood plain away from the coast, would find
of water 80 feet deep all over the place.
??? Why is deep water necessary?
Ah, I think I've misled you slightly as to my point. I was commenting
on why the snorkling hypothesis is untenable, I was not implying that
sauropods were completely hydrophobic and/or could not swim. The
original (early 1900's? late 1800's?) snorkling hypothesis held that
the animals sat on the bottom of a pool with the head just breaking the
surface. This requires deep water. If you're asking whether a sauropod
might wade into 4 meters of water and find something quick to munch,
then you are proposing a much more reasonable situation that does not
require a 'snorkle' in the first place. In fact, if the animals are
just wading (or even swimming on the surface) lung collapse is no longer
an issue. Surface swimming would inhibit breathing a bit because
sauropods are just so big and the lungs are therefore still several
meters underwater. That is a far cry from being dozens of meters (or
more) under the surface, however. So yes, I would agree they could
swim. Heck, a lmost every terrestrial animal can swim. No reason not
to ford a river...sitting on the bottom is just not a feasible option.
Especially if the neck can not be raised much from the horizontal.