Hypotheses pertaining to three models proposed to explain differences in sizes of
barnacles in different sites were tested to determine the influence of rates of growth,
different periods of growth and longevity on size of barnacles. There was no relationship
between the growth of juveniles from the end of 1989 to the end of 1992 at each site and
the mean size of adults at each site. That is, faster rates of growth were not found to
influence the presence of large barnacles. Similarly, periods of growth did not differ
among sites when juveniles were measured from 1989 to 1992.