Lecture 20 - population and interspecific relationships

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9 Terms

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Population

A group of the same species living in a particular place

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Mortality

Death rate per thousand population per year

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Natality

number of births per population 1000 per year

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Age structure

The distribution of various age groups in a population

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Mark and recapture

For highly mobile animals. Collect and count a large sample of organisms. Mark and release.

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Commensalism - symbiosis - mutualism relationship

One organism benefits and the other is unaffected

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Mutualism - symbiosis definition

A relationship between two in which both benefit.

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Competition is

Not symbiosis, as they are competing for the same recourse

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Amensalism definition

Not symbiosis - An interaction which one species is inhibited and the other is neither benefited or harmed