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Population size week 4 - bearers Nutria can eat up to a...

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Running head: CHECKPOINT POPULATION SIZE 1 Checkpoint Population Size Carrie Schmader SCI/175 08/19/2011 Zakiya Ross
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CHECKPOINT POPULATION SIZE 2 Checkpoint Population Size The two most related factors that produce the change in population is birth rate and death rate. The birth rate is the rate at an individual organism gives birth to an offspring. The death rate is the rate in which an individual organism dies. The other two factors in cause of change in population size are called dispersal. Dispersal is the movement from one region or country to another. Immigration is when a person or individuals enter a population and that is when it increases the size. Emigration is when a person or individuals leave the population, in turn decreases the size. In the video, the factor that is affecting the population size with the Nutria is the birth rate. Nutria is a furry rodent that came from South America and was put in Louisiana, but is not native to that area. Back in the 1930’s the Nutria was brought to Louisiana as a prospective fur
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Unformatted text preview: bearers. Nutria can eat up to a quarter of their body weight every day. They also have the potential to eat all the vegetation, which keeps the top layer mat over the organic ooze in Louisiana. A female Nutria gives birth to at least 40 offspring in three years and then the offspring can start reproducing when they are six months old. With them being vegetarians they are eating all of the wetland vegetation and it is a big destruction to the environment in Louisiana. My prediction for the Nutria after they eat all the food sources is that they will start migrating to different states. Also they will start to have a higher death rate than they will have in birth rate. If there is no food then they will start decline. My husband works in Louisiana and he has stated that if they see Nutria then are to kill it and cut its tail off and the tail is worth five dollars per tail. CHECKPOINT POPULATION SIZE 3...
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