Lipids as pigments in plants and bird feathers.

Birds acquire the pigments that color their feathers red or yellow by eating plant materials that contain carotenoid pigments, such as canthaxanthin and zeaxanthin.

The differences in pigmentation between male and female birds are the result of differences in intestinal uptake and processing of carotenoids.

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: