Parameter Descriptions for ypr Functions
The maximum age (yr).
The VB growth coefficient (yr-1).
The VB mean maximum length (cm).
The (theoretical) age at zero length (yr).
The VB growth coefficient after length L2 (yr-1).
The VB mean maximum length after length L2 (cm).
The length (or age if negative) at which growth switches from the first to second phase (cm or yr).
The weight (as a function of length) scaling exponent.
The length (or age if negative) at which 50 % mature (cm or yr).
The maturity (as a function of length) power.
The annual probability of a mature fish spawning.
The spawning mortality probability.
The fecundity (as a function of weight) scaling exponent.
The age from which survival is density-independent (yr).
Recruitment follows a Beverton-Holt (1) or Ricker (0) relationship.
The lifetime spawners per spawner at low density (or the egg to tR survival if between 0 and 1).
The annual interval natural mortality rate from age tR.
The annual interval natural mortality rate from length Ln.
The length (or age if negative) at which the natural mortality rate switches from n to nL (cm or yr).
The length (or age if negative) at which 50 % vulnerable to harvest (cm or yr).
The vulnerability to harvest (as a function of length) power.
The lower harvest slot length (cm).
The upper harvest slot length (cm).
The slot limits non-compliance probability.
A vector of probabilities of capture to calculate the yield for.
The release probability.
The hooking mortality probability.
The number of recruits at the carrying capacity (ind).
The (extrapolated) weight of a 1 cm individual (g).
The (theoretical) fecundity of a 1 g female (eggs).
The catchability (annual probability of capture) for a unit of effort.
The relative proportion of recruits that are of the ecotype.
A flag specifying whether to include all parameter values.
A flag specifying whether to plot the exploitation rate as opposed to the capture rate.
A flag specifying whether to plot the number of fish as a percent or frequency (the default).
A string of the color around each bar (or NULL).
An object of class ypr_population().
An object of class ypr_populations().
An object of class ypr_ecotypes().
A flag specifying whether to plot the actual and optimal values.
The minimum length (trophy) fish to consider when calculating the yield (cm).
A flag specifying whether to calculate the yield for harvested fish or captures.
A flag specifying whether to calculate the yield in terms of the biomass versus number of individuals.
A string of the report title.
A date of the report date.
A string of the path to the file (without the extension).
A positive integer of the width of the bins for grouping.
A string indicating whether to include 'both' or just the 'actual' or 'optimal' yield.
The population or populations.
Unused parameters.
A flag specifying whether to expand parameter combinations.
A flag specifying whether to view the report (after rendering it to html).
A flag specifying whether to ask before overwriting or creating a file.
A string describing the population.
A numeric vector of the age (yr).
A numeric vector of the length (cm).
A character vector of unique ecotype names.
The object to coerce.