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Test: ACT Science
Predator prey relationships can often influence the survivorship of species. Models are created to better visualize these relationships and their effects on population growths and declines. One way to display this information is to plot the density of the prey population against the number of prey consumed by a certain predator. As seen in Figure 1, three characteristic curves have been observed using this method. Curve Type I curve is the most unrealistic and exists when the number of prey consumed increases in direct proportion to the number of prey, with no limit on consumption. Curve Type II curve is characterized by a trend that shows the number of prey consumed per predator increasing quickly, but as the prey density increases the predators become satiated and the number of prey consumed stabilizes. Curve Type III resembles Type II in that it has an upper limit, but predators consume relatively few prey at lower densities due to various reasons.
Figure 1
| 1. | Predator satiation occurs when predators cannot consume prey at an ever-increasing rate. It occurs when prey numbers grow faster than predators' abilities to hunt them. Which two types of curves in Figure 1 exhibit predator satiation? |
Type I and Type II
Type II and Type III
None of the choices are correct.
Type I and Type III
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