Est.life.tab: Estimated life table.

In strandCet: Estimation of Biological Parameters from Stranded Cetaceans

Description

Performs a regular life table from estimated and smoothed mortality rates at age.

Usage

Est.life.tab(Est.qx, age = age, n = 1000)

Arguments

Est.qx	Estimated mortality vector with same length as age.
age	The age at the beginning of the age classes of the life table.
n	The amount of individuals of the first age class in the theoretical population.

Details

Constructs a cohort life table from estimated and smoothed mortality rates calculated with mortality functions as Si.mod or HP.mod

Value

A dataframe with seven columns:

age	Age at the beginning of the interval.
qx	Probability of death between ages x and x + n.
nx	Number of survivors at age x in a theoretical cohort starting with n individuals.
dx	Number of deaths at age x in a theoretical cohort starting with n individuals.
lx	Probability of survival to exact age x.
ex	Life expectancy at age x.
Zx	Instant death rate at age x

References

Preston, S.H., Heuveline, P. and Guillot, F. (2001). Demography: Measuring and modeling population processes. Oxford: Blackwell.

See Also

Si.mod HP.mod

Examples

modSi <- Si.mod(data = cetaceans, rm = 2,
                par = c(0.3159462,  0.1860541, -1.2802880,  1.1733226,  0.0170314))

dataSi <- Si.pred(data = cetaceans, Sout = modSi, rm = 2)

Est.life.tab(Est.qx = dataSi$qx.tot, age = 0:29, n = 1000)

strandCet documentation built on May 1, 2019, 8:19 p.m.