Latest Scientific Research Publications

Impact of shark-feeding tourism on surrounding fish populations off Moorea Islan
Matthias Vignon, Pierre Sasal, Ryan L. Johnson and Renéé Galzin (in press) Impact of shark-feeding tourism on surrounding fish populations off Moorea Island (French Polynesia). Journal of Marine Freshwater research.
Coastal swimming patterns of white sharks at Mossel Bay
Johnson, R., Bester, M.N., Dudley, S.F.J., Oosthuizen, W.H., Meÿer, M.A., Hancke, S. & Gennari, E. (2009) Coastal swimming patterns of white sharks (Carcharodon carcharias) at Mossel Bay, South Africa. Environmental Biology of Fishes, 85(3):189-200.
Concordance of genetic and fin photo identification in the great white shark of Mossel Bay
Gubili, C., Johnson, R., Gennari, E., Oosthuizen, w.H., Kotze, P.G.H., Meÿer, M.A., Sims, D.W., Jones, C.S. & Noble, L.R. (2009) Concordance of genetic and fin photo identification in the great white shark, Carcharodon carcharias, of Mossel Bay, South Africa. Marine Biology Published on-line first.
Encounters between white sharks and Cape fur seals in a shallow channel
R. Johnson, T. Keswick, M.N. Bester and W.H. Oosthuizen (2008) Encounters between white sharks and Cape fur seals in a shallow channel. Journal of the Marine Biological Association - Biodiversity Records, Published on-line.
White shark abundance: not a causative factor in numbers of shark bite incidents
Kock A., Johnson, R.L., Bester M.N., Compagno L., Cliff G., Dudley S., Gennari E., Griffiths C.L., Kotze D., Laroche K., Meyer M.A., Oosthuizen W.H. and Swanson, S. (2006). White shark abundance: not a causative factor in numbers of shark bite incidents. In: Nel D.C. & Peschak T.P. (eds.): Finding a balance: white shark conservation and recreational safety in the inshore waters of Cape Town, South Africa - proceedings of a specialist workshop. WWF South Africa Report Series - 2006/Marine/001: 1-19.

Contact Information for Ryan Johnson

Contact Marine Explorer Ryan Johnson

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Predator prey games of great white sharks

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About the Project

In waters surrounding Cape fur seal rookeries, one of the most intense behavioral games is played out between fur seals and the great white shark. Nothing can explain the excitement and adrenalin that flows when you see great whites hunting seals! But apart from all the excitement and yelling, the predator prey games that have evolved in this intense environment can be used to test and examine many theories and hypotheses on how hunters and the hunted co-exist in nature.