Daily and monthly counts of barnacle settlement rates on test panels at Miami Beach are presented for the years 1943 to 1970. The effects of various environmental factors, such as water temperature, river discharge, sewage pollution, and hurricanes, upon the barnacle populations of
the test panels are also discussed. Changes in the species composition due to the immigration of two species of barnacles new to the Miami area are also documented. In addition, barnacle settlement is considered in relation to populations of other fouling organisms found on the panels.
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