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TLS Online TPP Program

#Id: 9580

Devonian - First amphibian and first seed plant appear, and insects Mass extinction late in period

#Unit 11. Evolution and Behavior #The Geological Time Scale #Part B Pointers
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TLS Online TPP Program

#Id: 1966

#Unit 10. Ecological Principles

Life table for the Beave
TLS Online TPP Program

#Id: 1967

#Unit 10. Ecological Principles
TLS Online TPP Program

#Id: 1968

#Unit 10. Ecological Principles

Survivorship (lx) is calculated by dividing the number of individuals in an age class by the number in the original cohort;
TLS Online TPP Program

#Id: 1969

#Unit 10. Ecological Principles

The mortality rate (qx) within each age class is estimated by the variable
TLS Online TPP Program

#Id: 1970

#Unit 10. Ecological Principles

This mortality rate allows us to determine whether mortality increases with age, decreases with age, or is independent of age
TLS Online TPP Program

#Id: 1971

#Unit 10. Ecological Principles

The number alive during an age class can be estimated by the relationship: