mizer (version 2.5.3)

getFMortGear: Get the fishing mortality by time, gear, species and size

Description

Calculates the fishing mortality rate \(F_{g,i,w}\) by gear, species and size and possibly time (in units 1/year).

Usage

getFMortGear(object, effort, time_range)

Value

An array. If the effort argument has a time dimension, or a MizerSim is passed in, the output array has four dimensions (time x gear x species x size). If the effort argument does not have a time dimension (i.e. it is a vector or a single numeric), the output array has three dimensions (gear x species x size).

Arguments

object

A MizerParams object or a MizerSim object.

effort

The effort for each fishing gear. See notes below.

time_range

Subset the returned fishing mortalities by time. The time range is either a vector of values, a vector of min and max time, or a single value. Default is the whole time range. Only used if the object argument is of type MizerSim.

See Also

Other rate functions: getEGrowth(), getERepro(), getEReproAndGrowth(), getEncounter(), getFMort(), getFeedingLevel(), getMort(), getPredMort(), getPredRate(), getRDD(), getRDI(), getRates(), getResourceMort()

Examples

# \donttest{
params <-NS_params
# Get the fishing mortality in initial state
F <- getFMortGear(params, effort = 1)
str(F)
# Get the initial fishing mortality when effort is different
# between the four gears:
F <- getFMortGear(params, effort = c(0.5, 1, 1.5, 0.75))
# Get the fishing mortality when effort is different
# between the four gears and changes with time:
effort <- array(NA, dim = c(20, 4))
effort[, 1] <- seq(from=0, to = 1, length = 20)
effort[, 2] <- seq(from=1, to = 0.5, length = 20)
effort[, 3] <- seq(from=1, to = 2, length = 20)
effort[, 4] <- seq(from=2, to = 1, length = 20)
F <- getFMortGear(params, effort = effort)
str(F)
# Get the fishing mortality using the effort already held in a MizerSim object.
sim <- project(params, t_max = 20, effort = 0.5)
F <- getFMortGear(sim)
F <- getFMortGear(sim, time_range = c(10, 20))
# }