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Smolt production

Source: R/hatchery.R
calc_smolt.Rd

Calculate smolt production from base stock-recruit parameters, habitat improvement, and fitness loss

Usage

calc_smolt(
  N1,
  N2 = N1,
  kappa,
  capacity,
  Smax,
  phi = 1,
  kappa_improve = 1,
  capacity_improve = 1,
  fitness_loss = 1,
  SRrel = c("BH", "Ricker"),
  per_recruit = FALSE
)

Arguments

N1

Egg production for the density-independent component of the stock-recruit relationship. Can be the number of spawners if phi = 1 and Smax is in units of spawners.

N2

Egg production for the density-dependent component of the stock-recruit relationship (only used if per_recruit = FALSE)

kappa

Base productivity parameter

capacity

Base capacity parameter if SRrel = "BH"

Smax

Base Smax parameter if SRrel = "Ricker"

phi

Unfished egg per smolt (1/phi is the replacement line)

kappa_improve

Proportional change in kappa from habitat improvement

capacity_improve

Proportional change in capacity or Smax from habitat improvement

fitness_loss

Survival term to reduce smolt production due to fitness, between 0-1

SRrel

Character for the stock-recruit function

per_recruit

Logical, whether N1 is a per recruit quantity (TRUE) or in absolute numbers (FALSE)

Value

Numeric