Calculate index of total biomass per stratum

Usage

calc_biomass_stratum(racebase_tables = NULL, cpue = NULL)

Arguments

racebase_tables: data object created from gapindex::get_data()
cpue: object created from gapindex::calc_cpue().

Value

Field	Description
YEAR	Year the survey was conducted in.
BIOMASS_MT	The estimated biomass caught in the survey for a species, group, or total for a given survey.
BIOMASS_VAR	The estimated biomass variance caught in the survey for a species, group, or total for a given survey.
N_WEIGHT	Total number of hauls with positive catch/weighed taxon data used in calculation.
N_COUNT	Total number of hauls with positive taxon counts used in calculation.
N_HAUL	Total number of valid hauls used in calculation.
N_LENGTH	Total number of hauls with taxon length data used in calculation.
CPUE_KGKM2_MEAN	The mean of catch weight (kilograms) divided by area (squared kilometers) swept by the net used in design-based indicie calculation.
CPUE_KGKM2_VAR	The variance of mean of catch weight (kilograms) divided by area (squared kilometers) swept by the net used in design-based indicie calculation.
CPUE_NOKM2_MEAN	The mean of catch count (number) divided by area (squared kilometers) swept by the net used in design-based indicie calculation.
CPUE_NOKM2_VAR	The variance of mMean of catch count (number) divided by area (squared kilometers) swept by the net used in design-based indicie calculation.
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 series. Stratum of value 0 indicates experimental tows.
SURVEY	Name and description of survey. The column 'survey' is associated with the 'srvy' and 'survey_id' columns.
SURVEY_DEFINITION_ID	This number uniquely identifies a survey. Name and description of survey. The column 'survey_id' is associated with the 'srvy' and 'survey' columns. For a complete list of surveys, review the code books.