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Table 1 The expected foraging responses of fallow deer for each potential mechanism of repellent function. Deer were exposed to two-choice food trials with no and low or low and high concentrations of repellent (more repellent = more defended)

From: A mechanistic understanding of repellent function against mammalian herbivores

Mechanisms Expected foraging response
Sensory cues altered
Olfactory/visual -Fewer trials involve consumption from more defended feeder in pair
-More likely to initiate consumption at less defended feeder in pair
Gustatory/somatosensory -Shift between feeders more often when consumption initiated at more defended feeder in pair
-Consume more from less defended feeder in pair
-More selective for less defended feeder in more defended (low-high) pair
Adverse physiological effects
Yes -More selective for less defended food with exposure
No -Less selective for less defended food with exposure