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. 2011 Nov 16;6(11):e26910. doi: 10.1371/journal.pone.0026910

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Upper panel, dry season (April 2009); lower panel, wet season (August 2009). Note that the experimental enclosure pictured in the upper panel is not completely ready for the replicate: we always verified that the exit traps were at the same height before the start of the replicate.