F. Aziz et al., EARLY DISPERSAL OF MAN ON ISLANDS OF THE INDONESIAN ARCHIPELAGO - FACTS AND CONTROLS, Anthropological science, 103(4), 1995, pp. 349-368
Sea barriers are an effective means of limiting the dispersal of terre
strial vertebrates. Fossil evidence shows, however, that land mammals
have colonized islands. The island faunas are impoverished, and from t
he faunal composition it can be learned that only large mammals with g
ood swimming and/or floating capacities could settle on these islands.
Such mammals include elephants, deer, and hippos. In some cases paleo
ecological conditions on islands have led to the development of faunas
with dwarf species. It is generally accepted that man was established
on islands in the Neolithic. There is, however, an increasing amount
of evidence that in some cases, migration of hominids across sea barri
ers initially occurred much earlier. The presence of flowery Palaeolit
hic industry on Sardinia (Italy) points to a Middle Pleistocene coloni
zation of this island. Other islands in the Mediterranean, like Crete
and Cyprus, were colonized only in the Neolithic. This proves that the
distance of the island to the coast of the mainland was not the only
limiting factor on colonization of islands by early Man. Other factors
such as food supply also play a role. On Sardinia a hare-like mammal
Prolagus existed. This animal had a high reproduction rate and could h
ave served as a continuous food supply for a hunter-gatherer populatio
n. On the islands of S.E. Asia we find giant rats. These mammals could
have served as a food supply for Palaeolithic Man. On Flores artifact
s are found in association with a Middle Pleistocene fauna. Palaeontol
ogical evidence shows a faunal turnover in the Middle Pleistocene on b
oth Sardinia (Italy) and Flores (Indonesia).