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Convert a datras_raw object to FishGlob format

Source: R/fishglob.R
as_fishglob.Rd

Convert a datras_raw / DATRASraw object into a data frame structured to match the FishGlob data set format.

Usage

as_fishglob(x)

Arguments

x

A datras_raw object containing HH and HL tables.

Value

A data frame in FishGlob-like format, with one row per haul-taxon combination.

Details

The function aggregates length-based catch information in HL to the haul-species level, merges the result with haul-level metadata from HH, computes abundance and biomass standardization metrics, and renames selected fields to match FishGlob naming conventions.

The function first aggregates HL records by haul and taxon using:

  • total weight (wgt), calculated as the sum of Wgt_total,

  • total number (num), calculated as the sum of Count.

These aggregated values are merged with the HH table and used to compute:

  • wgt_cpue: biomass per hour trawled,

  • wgt_cpua: biomass per swept area,

  • num_cpue: abundance per hour trawled,

  • num_cpua: abundance per swept area.

Haul duration is converted from minutes to hours before calculating CPUE metrics.

The returned data frame follows FishGlob naming conventions where possible, including fields such as survey, haul_id, latitude, longitude, accepted_name, and aphia_id.

Some output fields are created as placeholders with missing values when the corresponding information is not available in the input data.

Country and survey-unit fields are assigned using survey-specific rules that approximate the FishGlob workflow.

See also

clean_fishglob(), prune_fishglob(), add_swept_area_fishglob(), add_total_weight_by_haul_fishglob()

Examples

if (FALSE) { # \dontrun{
fg <- as_fishglob(x)
} # }