I studied the effects of interspecific competition and perceived predator risk on Dipodomys compactus and Perognathus merriami, using a feeding arena, night vision camera and three predator (Canis latrans, Procyon lotor and Crotalus atrox) scents. Observed competitive environment seed fates differed from expected competitive environment seed fates (p <0.001). The addition of olfactory predator cues to a competitive environment altered seed fates compared to a competitive environment without scent (p < 0.001). Interspecific competition did not have an effect on the total time spent at the seed tray per night (p = 0.862). The interaction between the effects of interspecific competition and rodent species on the total number of trips to seed tray per night approached significance (p = 0.051). Predator scent did have an effect on the total time per night spent at the seed tray or the total number of trips to the seed tray per night (p = 0.862 and p = 0.955, respectively).
July 27, 2016
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