Predict Population Growth Lambda — bb_predict_growth • bboutools

Predicts population growth (lambda) from survival and recruitment fit objects using the Hatter-Bergerud equation (Hatter and Bergerud, 1991).

bb_predict_growth(
  survival,
  recruitment,
  sex_ratio = 0.5,
  conf_level = 0.95,
  estimate = median,
  sig_fig = 3
)

bb_predict_lambda(
  survival,
  recruitment,
  conf_level = 0.95,
  estimate = median,
  sig_fig = 3
)

Arguments

survival: An object of class 'bboufit_survival' (output of bb_fit_survival()).
recruitment: An object of class 'bboufit_recruitment' (output of bb_fit_recruitment())
sex_ratio: A number between 0 and 1 of the proportion of females at birth.
conf_level: A number between 0 and 1 of the confidence level.
estimate: A function to calculate the estimate.
sig_fig: A whole number of the significant figures to round estimates by.

Value

A tibble of the lambda estimates with upper and lower credible intervals.

Functions

bb_predict_lambda(): Deprecated for bb_predict_growth()

References

Hatter, Ian, and Wendy Bergerud. 1991. “Moose Recruitment, Adult Mortality and Rate of Change” 27: 65–73.

See also

Other analysis: bb_predict_calf_cow_ratio(), bb_predict_population_change(), bb_predict_recruitment(), bb_predict_recruitment_trend(), bb_predict_survival(), bb_predict_survival_trend()

Examples

if (interactive()) {
  survival <- bb_fit_survival(bboudata::bbousurv_a)
  recruitment <- bb_fit_recruitment(bboudata::bbourecruit_a)
  growth <- bb_predict_growth(survival, recruitment)
}