Numbers caught and the CPUE in each length class

This function generates two new columns: n (numbers caught) and cpue (numbers caught per one hour towing) for the length table (HL).

Usage

dr_add_n_and_cpue(
  d,
  NumberAtLength = NumberAtLength,
  HaulDuration = HaulDuration,
  SubsamplingFactor = SubsamplingFactor
)

Arguments

d

DATRAS length table (HL) containing columns .id, a column for NumberAtLength, a column for HaulDuration, and a column for SubsamplingFactor.

NumberAtLength

The column specifying the number of individuals (unquoted). Defaults to NumberAtLength.

HaulDuration

The column specifying haul duration (unquoted). Defaults to HaulDuration.

SubsamplingFactor

The column specifying the subsampling factor (unquoted). Defaults to SubsamplingFactor.

Value

The input table with additional columns n_haul and n_hour.