Table 1 Summary of killer whale observations during fall (September 1 – November 30) standardized surveys at Southeast Farallon Island between 1987 and 2013.

From: Killer whales redistribute white shark foraging pressure on seals

  Date Minimum dist. (km) Duration (hr) Pod size Predation observed Shark flight Ecotype
  22-Oct-92 6 no no
  24-Sep-95 4.8 <5 12 no no
  23-Nov-96 5.6 15 no no
** 4-Oct-97 0.2 2.4 2 yes Srv Tran
  14-Oct-97 0.2 5.5 3 no Srv
  17-Oct-97 2 no Srv Tran
  31-Oct-97 <1 2 no Srv Tran
  14-Oct-98 2.8 4 no no
  14-Nov-99 7.4 17 no no
  18-Nov-00 15 no no
** 19-Nov-00 0.2 <4 12 yes SW
  21-Nov-00 0.2 5 no SW
  9-Nov-01 6.5 12 no no
** 2-Nov-09 0.2 2.5 7 yes Srv, Tag Tran, Off
** 20-Nov-11 * * * * Srv, Tag *
  4-Sep-12 2.8 1 no no
** 31-Oct-13 0.6 13 no Srv, Tag
  9-Nov-13 2 no Srv, Tag
  11-Nov-13 2 no Srv, Tag
  1. A flight response by white sharks was documented from tag data (Tag) or standardized surveys (Srv) on four occasions when transient (Tran) or offshore (Off) killer whales occurred in close proximity to SEFI and on a fifth occasion when killer whales were not observed (surveys were also not conducted during inclement weather).
  2. SW - evidence from shark watch data.
  3. Tag - evidence from tagging data.
  4. **Initial flight response by white sharks.
  5. *Killer whales inferred but not observed (see SI figure for 2011).