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Ch. 51 - Population Ecology

Chapter 50, Problem 16

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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Hello everyone and welcome to today's video. So which of the following is an a biotic factor that can limit population growth. So before we jump into this video I want you to think about this term a biotic factor and think about it in terms of older videos, what it means and in case you forgot I want to help you recall this. These a biotic factors are certain non living factors that exist in a bio mom. And some of these examples are temperatures, sunlight, nutrients, water ph salinity and humidity. These are the main a biotic factors that we're going to see in certain environments. So these terms non living is the key factor that is going to just encompass all of these factors. Now let's go over answer choices so that we can begin solving the problem beginning by answer choices A and C. Predation and competition for food. The reason why we're taking these together is because they are both certain interactions between organisms. However they do not form a part of these a biotic factors because they're not really things, they're more interactions between these types of animals. So we're going to cancel these two out. Then we have parasites and parasites or organisms which means that many parasites are actually alive. So we're going to cancel it all because remember that these biotic factors are non living and this all leaves us with extremely cold temperatures which as we can see it is a part of our list of a biotic factors. So we're going to highlight this as being our final answer the reason why these extremely cold temperatures can limit population growth is because certain animals or populations suffer under these extreme cold temperatures and they population size could be reduced due to them. So because of that, that is going to be the final answer to a question. And the end of the video, I really hope this helped you, and I hope to see you on the next one.
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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? 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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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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