Although actual systems in the real world are never as neat, tidy, and well-defined as the simplified versions in models, the real-world relationship between lynx and hares is pretty similar to the idealized relationship in the model, with other predators or prey playing a very limited role in lynx and hare populations. Likewise, the main predators of snowshoe hares over most of their geographic range are Canada lynx. Generally a smaller bird will outclimb a larger predator and hence outclimbing should be a common escape strategy. Predators that eat animals have a monogastric digestive system. The predator should also have immunity against poisons of the prey. It should also have a good sense of hearing, sight, and smell. The predator should have the speed, stealth, and camouflage. Throughout much of their geographical range, the main food source for Canada lynx are snowshoe hares. In order to kill the prey, predator should be stronger than the prey. For example, a predator that heads directly toward the prey’s instantaneous position through time as the prey moves around (i.e., (t) 0 ) exhibits the geometric rule known as pure pursuit (Shneydor 1998), or classical. The lynx and hare predator-prey relationship is a good real-world example of the simple predator-prey system modeled earlier in this lesson. Kinematic measurements of predator and prey offer a basis for revealing the geometric rules of a predator. These counts of pelts provide an approximate measure of the lynx and hare population sizes during the 90-year period. With predatory mite added both prey and predator go. For 90 years, from 1845 to 1935, the Hudson Bay Company kept detailed records of the number of lynx and hare pelts they acquired from trappers each year. Fig1 In the absence of predators, the herbivorous mite population flucuates through time but persists. It can also die of the infection by the Vibrio prey, thus. NOTE: The Hudson Bay Company in Canada bought pelts from trappers during the 1800s and early 1900s. An infected predator can recuperate returning back to susceptible predators, or die naturally.
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