Figure 1.

Quarantine invasion risk map of the Asian house gecko (AHG) on Barrow Island¹². Inset map at the top right is the map of Australia with the location of Barrow Island shown as a red marker (https://www.google.com/maps). Zone 0 is the buffer area at Material Offloading Facility (MOF) (i.e. X-Blocs area). Zone 1 is the area with the highest occupancy probability, where the majority of the surveillance budget should be spent. Zone 2 is the secondary introduction area (100 m buffer area around Zone 1) and is considered the lower risk boundary for a species dispersing out of Zone 1. Zone 3 is the remaining island area where the AHG is less likely to establish prior to detection thus with no SSCs allocated.