Calculate index of total biomass per stratum

Usage

calc_biomass_stratum(
  gapdata = NULL,
  racebase_tables = lifecycle::deprecated(),
  cpue = NULL
)

Arguments

gapdata: data object created from gapindex::get_data()
racebase_tables: Use the gapdata argument instead.
cpue: object created from gapindex::calc_cpue().

Value

Field	Description
N_COUNT	Total number of hauls with positive count data.
N_HAUL	Total number of hauls.
N_LENGTH	Total number of hauls with length data.
N_WEIGHT	Total number of hauls with positive catch biomass.
POPULATION_COUNT	The estimated population caught in the survey for a species, group, or total for a given survey.
POPULATION_VAR	The estimated population variance caught in the survey for a species, group, or total for a given survey.
SPECIES_CODE	The species code of the organism associated with the common_name and scientific_name columns. For a complete species list, review the code books.
STRATUM	RACE database statistical area for analyzing data. Strata were designed using bathymetry and other geographic and habitat-related elements. The strata are unique to each survey region. Stratum of value 0 indicates experimental tows.
SURVEY	Name and description of survey. The column survey is associated with the srvy and survey_definition_id columns.
SURVEY_DEFINITION_ID	The survey definition ID key code is an integer that uniquely identifies a survey region/survey design. The column survey_definition_id is associated with the srvy and survey columns. Full list of survey definition IDs are in RACE_DATA.SURVEY_DEFINITIONS and in the code books.
YEAR	Year the observation (survey) was collected.
BIOMASS_MT	The estimated total biomass.
BIOMASS_VAR	The estimated variance associated with the total biomass.
CPUE_KGKM2_MEAN	The mean catch weight (kilograms) per unit effort (area swept by the net, units squared kilometers).
CPUE_KGKM2_VAR	The variance of mean catch weight (kilograms) per unit effort (area swept by the net, units squared kilometers).
CPUE_NOKM2_MEAN	The mean of numerical catch per unit effort (area swept by the net, units square kilometers).
CPUE_NOKM2_VAR	The variance of mean numerical catch per unit effort (area swept by the net, units square kilometers).