BIOL208 Lecture Notes - Lecture 22: Pronghorn, Kingsnake, The Poison
5 Apr 2016
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Lecture 22: predation: the ecology of fear, strategies of avoidance. Trade-off between foraging and risk of predation. Non-consumptive effects of predators: the ecology of fear. Predators do much more than kill their prey. Consumptive effects of predation are the direct effects that predators have on prey populations through the capture and consumption of living prey. At any instance, the direct consumptive effects of predation influence only a small proportion of prey. Non-consumptive effects of predators are those changes to the prey that occur because of the presence of predators, even when the prey are not killed. Have significant consequences on prey population dynamics. E. g. altered behaviour, shits in morphological traits, and stress-physiology. The presence of a predator causes biologically significant effects on prey populations. E. g. snowshoe hare and the lynx (boonstra et al. Lynx hare cycle due: hare exceeding k, lynx controlling hares, or both factors combined. Whether the hares exhibited stress in response to predators.
