As a condition of licence for harvesting Macrocystis pyrifera (Linnaeus) C. Agardh 1820, Alginates (Australia) P/L lodged harvest returns to the Tasmanian Lands Department. The harvest returns consisted of what tonnage was harvested from where, when and the length of trip. While Alginates (Australia) P/L harvested from 1964-1973, harvest data for individual sites is only available for the years 1970-71. Here the data is summed for individual sites for the two years 1970-71.

Data presented is taken from Tasmanian Archives and consists of the summed tonnages collected by the harvesting barge of Alginates P/L for the period 1970-71. Data is the total tonnage harvested for each site detailed in the records.

Position Accuracy: Actual site of harvest varies by +/- 10km. Attribute Accuracy: Data presented is quantity harvested (+/-5 ton?). Logical Consistency: All data is checked by both visual and automated means. Completeness: Two sites not located (and thus not plotted) were Bakers Point (151 tons) and Galeena Reef (87tons).