Behavioral test chambers.

<p><b>A)</b> Floor surface areas for chambers used for behavioral testing in different rodent species. Dashed lines indicate the locations of quadrants used to score locomotion during video playback. <b>B)</b> Larger chamber used to test nutria and beaver. All test chambers had a clear glass floor and video recordings of the ventral surface of animals were collected by reflection in a mirror (45° angle). This design is based on taste reactivity testing, which is focused on the recording of mouth movements in laboratory rodents <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0060537#pone.0060537-Flynn1" target="_blank">[80]</a>.