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Check Point - Population Size

Check Point - Population Size - the nutria are not moving...

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One of four factors that changes population sizes is birth rate. Birth rate is described as births per 1000 people per year. Another factor is death rate, which is pretty much the same as births, which is the number of deaths per 1000 people per year. Immigration is the third factor that produces change in population size. When someone immigrates, or moves, to already populated towns, that also increase the population size. Emigration is the fourth and final factor. With emigration, you have people moving away from a population, which will decrease the population size. I think birth rate and death rate are the two main factors in the video. I think this because
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Unformatted text preview: the nutria are not moving away from or moving to anywhere where there is other nutria. The bigger of the two factors though, is the birth rate because they birth faster then they die off. I think there are three things that could happen to the nutria. The nutria will eat up all the vegetation and die of starvation, immigrate to another part of the country to survive, or they will do a little of both by adapting to survive on the different vegetation across the country....
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