(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 4


Fig. 4. Response of Procambarus clarkii to the approach of the target under polarized and unpolarized conditions (N=20 for each treatment). Crayfish retreated from the target significantly more often in the polarized condition (P<0.00005).