  We report the results of carrying out a large number of simulations on a
coevolutionary model of multispecies communities. A wide range of parameter
values were investigated which allowed a rather complete picture of the change
in behaviour of the model as these parameters were varied to be built up. Our
main interest was in the nature of the community food webs constructed via the
simulations. We identify the range of parameter values which give rise to
realistic food webs and give arguments which allow some of the structure which
is found to be understood in an intuitive way. Since the webs are evolved
according to the rules of the model, the strengths of the predator-prey links
are not determined a priori, and emerge from the process of constructing the
web. We measure the distribution of these link strengths, and find that there
are a large number of weak links, in agreement with recent suggestions. We also
review some of the data on food webs available in the literature, and make some
tentative comparisons with our results. The difficulties of making such
comparisons and the possible future developments of the model are also briefly
discussed.
