Marine Biology

, Volume 160, Issue 11, pp 2863–2875 | Cite as

The effects of cage-diving activities on the fine-scale swimming behaviour and space use of white sharks

  • Charlie HuveneersEmail author
  • Paul J. Rogers
  • Crystal Beckmann
  • Jayson M. Semmens
  • Barry D. Bruce
  • Laurent Seuront
Original Paper


Wildlife tourism has become increasingly popular and is one of the fastest growing sectors of the tourism industry. A radio-acoustic positioning system was deployed to monitor the fine-scale movements of 21 white sharks (Carcharodon carcharias) and investigate the effects of shark cage-diving activities on their swimming behaviour and space use. This study contributes towards improving our understanding of the complex relationship between wildlife tourism and its effects on sharks, and assesses how tourism targeting sharks affects behaviour at a finer spatial scale than previously investigated. Our study demonstrated that shark cage-diving operators (SCDO) influenced the fine-scale three-dimensional spatial distribution and the rate of movement of white sharks at the Neptune Islands. White sharks stayed more than 30 m away from the SCDO on 21 % of the days detected, but spent a significant amount of time in close proximity to the SCDO on the remaining days. Individual variation was detected, with some sharks behaviourally responding to SCDO more than others. The degree of variation between individual sharks and the different levels of interaction (e.g. presence, proximity to SCDO, and consumption of tethered bait) highlights the complexity of the relationships between SCDO and the effects on sharks. To improve our understanding of these relationships, future monitoring of shark cage-diving operations requires proximity to SCDO to be recorded in addition to the presence within the area. Further work is needed to assess whether the observed behavioural changes would affect individual fitness and ultimately population viability, which are critical information to unambiguously assess the potential impacts of wildlife tourism targeting sharks.


Swimming Speed Hydrophone White Shark Routine Metabolic Rate Swimming Depth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This project was carried out under the Department of the Environment and Natural Resources permit number M25738 and M25738-2, and PIRSA Exemption number 9902364. Tagging was undertaken under Flinders University ethics approval number E287, while the VRAP system was operated under the radio licence number 1917458 provided by the Australian Communications and Media Authority. This project was funded by the Winifred Violet Scott Charitable Trust, Neiser Foundation, Wildlife Conservation Fund, Nature Foundation of South Australia, and Solar Online. This research was also partly supported under the Australian Research Council’s Discovery Projects funding scheme (project number DP0988554; Professor Seuront is the recipient of an Australian Professorial Fellowship (project number DP0988554). The authors would like to thank A. Fox, J. Taylor, and R. Robbins from Rodney Fox Shark Expeditions, and A. Wright and crew from Calypso Star Charters for providing invaluable logistic support and advice during this study. We thank H. Pederson and W. Gillepsie from Eonfusion, Myriax, for their effort and support with the data manipulation and analysis. A. Lowther and S. Kim helped with the time-spent-in-area calculation, GAMM analyses, and statistical interpretation.

Supplementary material

227_2013_2277_MOESM1_ESM.docx (285 kb)
Supplementary material 1 (DOCX 284 kb)


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Copyright information

© Her Majesty the Queen in Right of Australia 2013

Authors and Affiliations

  • Charlie Huveneers
    • 1
    • 2
    Email author
  • Paul J. Rogers
    • 1
  • Crystal Beckmann
    • 2
  • Jayson M. Semmens
    • 3
  • Barry D. Bruce
    • 4
  • Laurent Seuront
    • 2
  1. 1.Threatened, Endangered and Protected Species Sub ProgramSARDI—Aquatic SciencesWest BeachAustralia
  2. 2.School of Biological SciencesFlinders UniversityBedford ParkAustralia
  3. 3.Fisheries, Aquaculture and Coasts CentreInstitute for Marine and Antarctic StudiesHobartAustralia
  4. 4.Wealth from Oceans FlagshipCommonwealth Scientific Institute Research OrganisationHobartAustralia

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