Verheagen & Munro 2011 - Pachyosteosclerosis ...

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Verheagen & Munro 2011 - Pachyosteosclerosis ...

Postby AlgisKuliukas » Sat May 26, 2012 7:30 pm

Pachyosteosclerosis suggests archaic Homo frequently collected sessile littoral foods

Homo - Journal of Comparative Human Biology

Fossil skeletons of Homo erectus and related specimens typically
had heavy cranial and postcranial bones, and it has been
hypothesised that these represent adaptations, or are responses,
to various physical activities such as endurance running, heavy
exertion, and/or aggressive behavior. According to the comparative
biological data, however, skeletons that show a combination
of disproportionally large diameters, extremely compact bone cortex,
and very narrow medullary canals are associated with aquatic
or semi-aquatic tetrapods that wade, and/or dive for sessile foods
such as hard-shelled invertebrates in shallow waters. These socalled
pachyosteosclerotic bones are less supple and more brittle
than non-pachyosteosclerotic bones, and marine biologists agree
that they function as hydrostatic ballast for buoyancy control. This
paper discusses the possibility that heavy skeletons in archaic Homo
might be associated with part-time collection of sessile foods in
shallow waters
Waterside hypotheses of human evolution assert that selection from wading, swimming and diving and procurement of food from aquatic habitats have significantly affected the evolution of the lineage leading to Homo sapiens as distinct from that leading to Pan. (p118)
Kuliukas, A., Morgan, E. (2011). Aquatic scenarios in the thinking on human evolution: What are they and how do they compare?. In: Vaneechoutte, M., Verhaegen, M., Kuliukas, A. (2011). Was Man More Aquatic in the Past?
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