Biology 2483A Lecture Notes - Lecture 12: Nurse Shark, Snow Goose, Intertidal Zone
3 Jan 2018
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Predator populations can cycle with their prey populations. Insights into population cycles have come from models, experiments, and field studies of predator prey interactions. Wo(cid:374)"t (cid:271)e testi(cid:374)g us o(cid:374) deri(cid:448)i(cid:374)g this fro(cid:373) first pri(cid:374)(cid:272)iples. Charles s. elton sunspots change over 11 year cycle, reasoned that it might have to do with climate change. Mere presence of a predator induces stress in hares that stress causes them to produce less offspring. Pop density of the predator changes the behavior of the prey. Population cycles are difficult to achieve in the laboratory. I(cid:374) huffaker"s (cid:894)1(cid:1013)5(cid:1012)(cid:895) e(cid:454)peri(cid:373)e(cid:374)ts (cid:449)ith a predator(cid:455) (cid:373)ite that eats the her(cid:271)i(cid:448)orous si(cid:454)-spotted mite. Six spotted mite runs around terrain and can move from rubber ball to food source. Predator drives prey to extinction and then predator goes to extinction. Blue spots at the top are the predators, squares are prey. Prey can escape from predators because they can disperse and predators cannot.
