Fig. 1. Transoceanic migration of a white shark from South Africa to northwestern Australia and possible first leg of a second transoceanic-migrating shark. (A) Positions of (dots) and track followed by (black line) shark P12 during coastal and transoceanic movement; geolocation-estimated positions were corrected using SST data to derive positions shown (11). The first leg of another possible transoceanic migration to Australia (or an offshore movement toward the north-east coast of South Africa) is shown by the pop-up location of the PAT tag from shark P3 (blue line and square). Tagging and pop-up dates were as follows: for P12, 7 November 2003 and 28 February 2004; for P3, 14 April 2003 and 25 December 2003. SST is an average composite at 4 km resolution for daily Moderate Resolution Imaging Spectro-radiometer data from 23 November 2003 to 28 February 2004. Southwest Indian Ridge shown as white depth contours (100 to 2000 m). The scale bar represents 5000 km; the white arrow marks the tag deployment location. (B) Differential timeat-depth patterns during the coastal and oceanic legs of shark P12's trip, showing a bimodal pattern with a strong preference for the depths of 0.0 to 0.5 m and 500 to 750 m during transoceanic travel. (C) Minimum (black line and squares) and maximum (bright blue line) depths and minimum temperature (orange dots) visited during the coastal and oceanic phases of movement; all data are in 6-hour periods.

Transoceanic Migration, Spatial Dynamics, and Population Linkages of White SharksRamón Bonfil, Michael Meÿer, Michael C. Scholl, Ryan Johnson, Shannon O'Brien, Herman Oosthuizen, Stephan Swanson, Deon Kotze, and Michael Paterson. Science 7 October 2005 310: 100-103 [DOI: 10.1126/science.1114898]