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Estimate the size of the wild population, via the Lincoln Index.

Usage

sit_wild_size(x, pool = FALSE, species = NULL)

Arguments

x

A sit object or a sit_adult_surveys object (in which case, following_releases, following_days and species are ignored).

pool

Logical. Whether to aggregate data from released populations.

species

a character vector of species to be returned. Defaults to NULL, which ignores the species variable.

Value

A sit_wild_size object.

Details

This provides multiple estimates of the population size, one for each age $t$ and for each released population, which can be averaged to compute a final estimate based on all the available data.

The calculation needs to be split by released population. First, because survival rates could be different among populations, but also because the number $n_t$ of captured wild males at a given date can be compared against the number of captured sterile males $m_t$ at different ages.

Examples

sit_wild_size(sit_prototype)
#> 
#> ── Wild male population size ───────────────────────────────────────────
#> 
#> 
#> population      p_est      p_sd
#> -----------  --------  --------
#> blue          4981.57   5420.85
#> red           3471.37   1919.16
#> yellow        6527.88   4248.72
#>