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. 2009 Sep 23;276(1677):4381–4388. doi: 10.1098/rspb.2009.1452

Figure 1.

Figure 1.

Experimental setup. The sketch shows the spatial arrangement of the three cameras, the dummy track, the crabs' burrows, and the experimenter for the first experimental session. The cameras recorded the crabs' responses to the dummy movements for two different approach types, a local dummy (thick black line) that moved only close to the crabs and a distant dummy (thick grey line) which moved along the same dummy track, but approached from further away.