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Ch. 51 - Population Ecology
All textbooksFreeman 8th EditionCh. 51 - Population EcologyProblem 14
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Chapter 50, Problem 14

Burmese pythons (Python molurus bivittatus) are constricting snakes that can reach enormous sizes (up to 7 meters in length). They are native to Southeast Asia but were released into southern Florida from the pet trade. Many other snakes occur naturally in this area. Are the introduced pythons a problem? A life table would help researchers make predictions about python population growth. If you were to track a cohort of pythons over time to construct a detailed life table, what kind of data would you want to collect?

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Hello everyone and welcome to today's video. So which of the following data is required to create a detailed life table for a species cohort? I want you to recall from previous videos what the requirements or what the life table for a species cohort is trying to do and in case you forgot, I want to help you recall this. Well the species life table for its cohort is going to follow the survival and the reproduction of all members of the cohort from birth to death. So remember that the survival and the reproduction are going to be the main things that we're looking at when we're creating this life table. Now that we know this. Let's jump our answer choices so that we can begin solving the problem. So answer choice A. Is going to be a specific survivorship, survivorship can be said that it is the same as a survival rate. So this is definitely going to be needed. And we're not going to cancel it out. These answer choice B. A specific quantity in case you don't know what this means. The quantity is an organism's ability to reproduce. Which as we can see, is also something that we need in order to create this detailed life table. So we're not going to cancel this out either. And these two answer choices do not provide really any information that we need. So answer choice is A. And B. Or answer choice C. Are you going to be the final answer to our question? That is the end of the video. And I really hope this helped you
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Textbook Question

Burmese pythons (Python molurus bivittatus) are constricting snakes that can reach enormous sizes (up to 7 meters in length). They are native to Southeast Asia but were released into southern Florida from the pet trade. Many other snakes occur naturally in this area. Are the introduced pythons a problem? Burmese pythons were first found in the wetlands of Everglades National Park in the 1980s, but only rarely. The accompanying graph shows what happened next. Most of the data are derived from chance encounters of pythons on roads and intermittent search effort near roads (pythons are notoriously difficult to find). Despite the variability in search effort, what type of population growth best describes the trend in the data from 2000 to 2020? a. logistic b. exponential c. linear d. logarithmic


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Textbook Question

Burmese pythons (Python molurus bivittatus) are constricting snakes that can reach enormous sizes (up to 7 meters in length). They are native to Southeast Asia but were released into southern Florida from the pet trade. Many other snakes occur naturally in this area. Are the introduced pythons a problem? Researchers hypothesize that the severe winter of 2010 caused the decline in the number of pythons encountered that year. Is cold weather typically a density-dependent factor or a density-independent factor? Explain the difference.

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Textbook Question

Burmese pythons (Python molurus bivittatus) are constricting snakes that can reach enormous sizes (up to 7 meters in length). They are native to Southeast Asia but were released into southern Florida from the pet trade. Many other snakes occur naturally in this area. Are the introduced pythons a problem? The data in the graph show the number of pythons that were encountered, not the total number of pythons in the population. Design a mark–recapture experiment to estimate the total population size of pythons, and list at least two assumptions you would be making in your experiment.

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Textbook Question

Burmese pythons (Python molurus bivittatus) are constricting snakes that can reach enormous sizes (up to 7 meters in length). They are native to Southeast Asia but were released into southern Florida from the pet trade. Many other snakes occur naturally in this area. Are the introduced pythons a problem? Pythons are generalist predators, consuming more than 75 species of prey including frogs, mice, rabbits, squirrels, porcupines, raccoons, leopards, deer, monkeys, alligators, and birds ranging from wrens to herons. Some surveys showed the disappearance of some animals, such as rabbits and opossums, from areas with pythons. Do you think food availability limits, or could limit, the carrying capacity of Burmese pythons in the Everglades?

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Textbook Question

Burmese pythons (Python molurus bivittatus) are constricting snakes that can reach enormous sizes (up to 7 meters in length). They are native to Southeast Asia but were released into southern Florida from the pet trade. Many other snakes occur naturally in this area. Are the introduced pythons a problem? The range of Burmese pythons in Florida is expanding rapidly. List at least one abiotic factor and one biotic factor that might limit the range of pythons.

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