ECOL 302 Lecture Notes - Lecture 19: Snowshoe Hare, Datura Stramonium, Coevolution
21 Nov 2014
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Includes: predation: complete consumption of organism by another, parasitism: partial consumption of animal. Victims have adaptations to survive (& antagonists have counteradaptations)=> evolutionary dynamics i. e. snowshoe hare getting faster. >it"s not as simple as predators having increased success with more prey. & prey having decreased success with more predators: ___________________ Victims lower fitness Hide (i. e. caterpillar spring generation vs summer generation > both end up looking like food) Mimicry (i. e. viceroy butterfly looks like toxic monarch) Mixed martial arts (i. e. horned toads have multiple defenses) Consumers either (a) sit and wait or (b) actively hunt. Toxins aren"t in plants because humans consume them; they"re due to herbivores i. ii. iii. iv. v. i. ii. Broad diet choice: when diverse prey can be obtained in same way; digested in same way & diverse prey similar in food value.
