BIOLOGY -TEXT
14th Edition
ISBN: 9781260710878
Author: Mader
Publisher: RENT MCG
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Textbook Question
Chapter 45.1, Problem 3CYP
Describe the two factors that can cause predator and prey populations to cycle in a
predictable manner.
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The yellow perch is a fish found in freshwater lakes. It is a generalist predator,
consuming a variety of prey species, including crayfish, small fish, insect larvae and
snails. You examine the predation rate of yellow perch on snails, and obtain the
following data. Identify the type of functional response, and a plausible reason for
why it has that type of response.
60-
40-
20-
Perch Predation Rate
Understand limiting factors such as and explain:
a. Limiting Factors
Resource availability
Predator/Prey Interaction
Reproductive Success
What defines the carrying capacity of a population?
Choose All That Apply
the maximum number of individuals a particular habitat can support
an indicator of the functional requirements that individuals in a population need for growth and
reproduction
a reflection of the environmental resources that are needed to support a population
Chapter 45 Solutions
BIOLOGY -TEXT
Ch. 45.1 - What happens to a species if it cannot coevolve...Ch. 45.1 - Prob. 1E.2QCCh. 45.1 - Prob. 1CYPCh. 45.1 - Prob. 2CYPCh. 45.1 - Describe the two factors that can cause predator...Ch. 45.2 - Prob. 1CYPCh. 45.2 - Prob. 2CYPCh. 45.3 - Prob. 1NS.1QCCh. 45.3 - How can city planners apply island biogeography to...Ch. 45.3 - Prob. 1CYP
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- In the Lotka-Volterra predator-prey equations, the term a b N prey N predator describes: The rate at which predators eat prey The rate at which new predators are added to the predator population The rate at which the predator population increases over time The intrinsic growth rate of the prey populationarrow_forwardUsing the lynx–hare interaction, explain in words the equations of the Lotka–Volterra model for the change in the population sizes of prey and predators.arrow_forwardDescribe the hare-lynx population cycle, considered a classic example of a prey-predator relationship (Figure ). From your examination of the cycle, formulate a hypothesis to explain the oscillations.arrow_forward
- The relationship between predator and prey populations has been studied by computer simulation using equations which form part of a mathematical model devised by Lotka and Volterra. The data in Table 6.10 show the results of such a simulation when the prey population begins with 20 individuals and the predator population begins with six individuals. 1.Explain why the peaks in the predator population occur after those in the prey population. 2. This simulation assumes one prey species and one predator species in an imaginary ecosystem and is based on mathematical equations. Why is it likely to be too simplistic to describe accurately what happens in nature?arrow_forwardPredators manage the population size of their prey through two methods: consumptive effects and non consumptive effects. What are the consequences of consumptive impacts on predator population? Use an example. What are consequences of non consumptive impacts on prey populations? Use an example.arrow_forwardDifferentiate between interspecific and intraspecific competition and provide a specific example of each type. Explain which one tends to be a stronger type of competition and explain why with a good example.arrow_forward
- This is a system dynamics model of the Lotka-Volterra Predator-Prey model. The two stocks in the model are prey and predators. The _________ __________ of the prey and predators change in response to the inflows ______and outflows_____. Each iteration the stock changes by the inflows minus the outflows, or ___________________________. The ___________ feedback is the result of the interconnections between the predator and the prey. The prey _________ the predators, and the predators ________the prey. This simple interaction allows the system to _____________. When the predators ________the prey, the small numbers of prey leads to the predators __________. With a __________ in predators the prey_____________, and the cycle continues.arrow_forwardDraw and label graphs (including zero-growth isoclines) showing the predicted behavior of the Lotka-Volterra predator/prey equations if we assume prey growth follows and exponential growth model. Show how the graphs would change of the prey follow a logistic growth model.arrow_forwardName two other environmental factors which can affect the success of a predator.arrow_forward
- Use the following simple predator-prey relationships to answer the questions about the system below (assume no other interactions exist in this system). Mice eat grain grown by a farmer before it can be harvested. The mice are consumed by several species of snakes, which themselves are consumed by hawks. A. If the population of snakes was suddenly wiped out by disease, explain the short-term effects on the grain, mice, and hawk populations, and why these effects would be observed. B. If the population of snakes were suddenly wiped out by disease, explain the long-term effects on the grain, mice, and hawk populations, and why these effects would be observed. C. Local farmers would like to use a biological, as opposed to a chemical, means to protect their crop. What would be the most effective way for farmers in this area to protect their grain crop naturally? Why? Edit View Insert Format Tools Table 12pt ✓ Paragraph BIUA V 2 ✓ T² v :arrow_forwardTwo winters ago, a species of bird called the pine siskin began appearing in droves at backyard bird feeders in my hometown. We would occasionally spot a few each winter, but numbers were unusually high that year. The next winter, it seemed as if all of the "extra" pine siskins had disappeared. Numbers fell back to the levels that we were used to seeing. Use the concept of carrying capacity to explain the irruption of pine siskins described in the scenario. Provide your answer in a standard paragraph using complete sentencesarrow_forwardAssume that for a given population of moose, the per-capita birth rate remains constant with population size. However, as the moose population size increases there is a linear increase in the probability of starvation and subsequent mortality due to intraspecific competition. a) On a single graph, draw the relationship between moose density and the per capita birth and death rates for this population. b) Assume that the population does not experience competition from other species, nor predation. Write out the equation that would best be used to describe the change in population growth from one time interval to another.arrow_forward
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