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Plot by hand the survivorship data for the Gray Squirrel life table. A survivorship curve has age or age class (x) on the x-axis and lx on the y-axis.

Plot by hand the survivorship data for the Gray Squirrel life table. A survivorship curve has age or age class (x) on the x-axis and lx on the y-axis.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Plot by hand the survivorship data for the Gray Squirrel life table. A survivorship curve has age or
age class (x) on the x-axis and lx on the y-axis.

The life table shown illustrates data from a cohort of Gray squirrels tracked from birth to death. Each element of the table provides important information: - **x**: Age class year (0 represents the first year, from birth to 1 year old, and so on). - **nₓ**: The number of squirrels alive at the start of age class x. - **lₓ**: The proportion of the original population alive at age class x, calculated by dividing nₓ by the original population size (e.g., for x = 3, lₓ = 48/530 = 0.09). - **dₓ**: The number of squirrels that die in age class x, calculated by subtracting the number of squirrels alive at the start of the next age class from those alive at the current age class (e.g., starting with 530 alive at x = 0, subtract the 159 alive at x = 1, giving dₓ = 371). - **qₓ**: The mortality rate, derived by dividing dₓ by nₓ, representing the proportion of squirrels that die during age class x (e.g., for x = 1, qₓ = 79/159 = 0.5). **Table 9.1: Gray Squirrel Life Table** | x | nₓ | lₓ | dₓ | qₓ | |---|-----|-----|-----|-----| | 0 | 530 | 1.0 | 371 | 0.7 | | 1 | 159 | 0.3 | 79 | 0.5 | | 2 | 80 | 0.15| 32 | 0.4 | | 3 | 48 | 0.09| 27 | 0.55| | 4 | 21 | 0.04| 16 | 0.75| | 5 | 5 | 0.01| 5 | 1.0 | This life table helps in analyzing historical and modern populations and comparing survivorship between males and females in gray squirrels.
Transcribed Image Text:The life table shown illustrates data from a cohort of Gray squirrels tracked from birth to death. Each element of the table provides important information: - **x**: Age class year (0 represents the first year, from birth to 1 year old, and so on). - **nₓ**: The number of squirrels alive at the start of age class x. - **lₓ**: The proportion of the original population alive at age class x, calculated by dividing nₓ by the original population size (e.g., for x = 3, lₓ = 48/530 = 0.09). - **dₓ**: The number of squirrels that die in age class x, calculated by subtracting the number of squirrels alive at the start of the next age class from those alive at the current age class (e.g., starting with 530 alive at x = 0, subtract the 159 alive at x = 1, giving dₓ = 371). - **qₓ**: The mortality rate, derived by dividing dₓ by nₓ, representing the proportion of squirrels that die during age class x (e.g., for x = 1, qₓ = 79/159 = 0.5). **Table 9.1: Gray Squirrel Life Table** | x | nₓ | lₓ | dₓ | qₓ | |---|-----|-----|-----|-----| | 0 | 530 | 1.0 | 371 | 0.7 | | 1 | 159 | 0.3 | 79 | 0.5 | | 2 | 80 | 0.15| 32 | 0.4 | | 3 | 48 | 0.09| 27 | 0.55| | 4 | 21 | 0.04| 16 | 0.75| | 5 | 5 | 0.01| 5 | 1.0 | This life table helps in analyzing historical and modern populations and comparing survivorship between males and females in gray squirrels.
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