Description Usage Arguments Value Examples
Calculate stage-specific fertility Based on Bill Morris' methods for calculating vital rates, available on the Wiki.
1 2 | stage_specific_fertility(b, f, adult_definition = "median", annual = TRUE,
census_start_month = NULL, filter_fertile = FALSE)
|
b |
Name of the tbl_df containing biography data generated by the function read_bio_table. |
f |
Name of the tbl_df containing fertility data generated by the function read_fert_table. |
adult_definition |
Character. Either "median" or "minimum". Determines how females should be defined: minimum age at first birth or median age at first birth. |
annual |
Logical. Should the fertility be calculated for each year separately? |
census_start_month |
Numeric vector of length equal to number of studies. |
filter_fertile |
Logical. If set to true, only females that are likely to be fertile are retained. |
Output is a tbl_df that includes the per capita fertility for each life-history stage for each study species. Life history stages include newborns, juveniles, and adults; these are defined as in Morris et al. 2011. Also included are the number of animals and the "female-years" of observation on which the calculation is based.
1 | ssf <- stage_specific_fertility(lh, fert)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.