Exam 12: Predation

In the Lotka‒Volterra predator‒prey model, b represents the

Herbivores most commonly eat the _______ of plants.

In the Lotka‒Volterra predator‒prey model, the parameter a represents the

Which of the following would likely result from a decrease in the density of the golden apple snail in an area that previously had large snail populations?

Refer to the figure. The figure shows the relationship between the relative proportion of prey type A that is available in an area and the proportion of prey type A in the total diet of three different predators. Which predator shows evidence that it prefers to eat the more common prey?

Larvae of agromyzid flies are typical of herbivorous insects. They feed off of _______ and tend to have _______ diets.

Insects feeding on the leaves of a plant stimulate the plant to produce more leaves. This is an example of

In Huffaker's studies of an herbivorous mite and its mite predator, when predator and prey were in a simple environment,

Suppose that a predatory fish eats only minnows and the predator‒prey interaction follows Lotka‒Volterra dynamics. The intrinsic growth rate of minnows in the absence of predators is 0.2 per month, and the mortality rate of the predatory fish in the absence of minnows is 0.1 per month. The capture efficiency rate is 0.004, and the efficiency at which minnow biomass is converted into predator biomass is 0.25. The predatory fish population will increase only if the number of minnows is

How does predation and herbivory differ from parasitism and parasitoidism?

Suppose that a lizard species eats only one type of insect and the populations follow Lotka‒Volterra dynamics. The intrinsic growth rate of insects in the absence of predators is 0.2 per week and the mortality rate of the lizards in the absence of insects is 0.05 per week. The capture efficiency rate is 0.002, and the efficiency at which insect biomass is converted into predator biomass is 0.2. The insect population size will increase only if the number of lizards is

Females in the wasp genus Nasonia typically lay eggs in the pupa of blowflies. The wasp eggs hatch into larvae, and the larvae kill and eat the fly pupa. Based on these observations, which statement is false?

Different species of marine snails that are preyed on by a shore crab differ in terms of how easily the crab can crush their shells. Studies of these snails have provided evidence for the

Suppose that a lizard species eats only one type of insect and the populations follow Lotka‒Volterra dynamics. The intrinsic growth rate of insects in the absence of predators is 0.2 per week, and the mortality rate of the lizards in the absence of insects is 0.05 per week. The capture efficiency rate is 0.002, and the efficiency at which insect biomass is converted into predator biomass is 0.2.The lizard population will increase only if the number of insects is

Suppose that rabbits are the only prey and food supply of foxes, and that the predator‒prey interaction follows Lotka‒Volterra dynamics. The mortality rate of foxes in the absence of rabbits is 0.1 per week, and the intrinsic growth rate of rabbits in the absence of predation is 0.2 per week. The capture efficiency is 0.002, and the efficiency at which rabbit biomass is converted into fox biomass is 0.2.If there are initially 30 foxes and 400 rabbits, the overall rate of change in the rabbit population will be a _______ of _______ per week.

Which of the following is not a way tobacco plants respond to herbivory?

The popular rhyme to distinguish the scarlet king snake (Lampropeltis elapsoides) from the venomous eastern coral snake (Micrurus fulvius) goes "red touching black - pat it on the back; red touching yellow - kills a fellow". Explain the type(s) of defense the scarlet king snake exhibits and an energetic advantage of this type of defense to the scarlet king snake.

Refer to the figure. The figure shows the interaction between predator abundance and prey abundance. Populations of lynx and hares are located at the star. Based on the Lotka-Volterra predator-prey model, we would expect the number of prey to _______ and the number of predators to _______.

Which factor most likely explains the synchrony of the hare population cycles in geographically distant areas?

Many species of butterflies are noxious to predators. They also have bright red coloration that indicates to the potential predators that they are unpleasant or even harmful to eat. This is an example of _______ coloration.