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Port Lincoln, South Australia is the departure port for the only white shark, Carcharodon carcharias, cage dive
industry in Australia. Established in the early 1960’s as a niche tourism venture, the industry has recently undergone a
rapid expansion to accommodate greater passenger numbers, more tourism operators, and additional infrastructure aimed
at capturing a greater proportion of the tourist dollar. However, to date, there has been no assessment of growth in the industry.
We have used the operator logbook system, introduced in 2000, as the basis for a rapid assessment of the maturity
as well as a conservative estimate of the economic value of the industry, with a focus on 2011. From the logbook system
the number of days on-site has increased from an average of 67 days per year prior to 2007 to 287 days on-site in 2011. In
2011 the industry accommodated approximately 5200 passengers with a direct domestic expenditure estimated to be in
excess of 6 million AUD. Changes in shark behaviour have been observed following the increase in days on-site. The
white shark cage dive industry has reached a stage in its development where increased management is required in order to
ensure a viable industry into the future. The rapid assessment technique described herein will allow managers to track
changes in cage dive participation rates and quickly respond to changes in the industry.