TARGET.K: Calculate a target K for the bisection method

In antarctic-humpback-2019-assessment/HumpbackSIR: Use Sample-Importance-Resampling to Estimate Southern Humpback Abundance

Calculate a target K for the bisection method

Description

Calculate a target K for the bisection method

Usage

TARGET.K(r_max, K, N1, z, num_Yrs, start_yr, target.Pop, catches,
  MVP = 0)

Arguments

r_max	The maximum net recruitment rate ($r_max$).
K	Pre-expoitation population size in numbers or biomass (depending on input).
N1	Population size in numbers or biomass at year 1 (generally assumed to be K).
z	Generalized logistic shape parameter, determines population size where productivity is masimum (assumed to be 2.39 by the ISC SC).
num_Yrs	The number of projection years. Set as the last year in the catchor abundance series whichever is most recent, minus the start year.
start_yr	First year of the projection (assumed to be the first year in the catch series).
target.Pop	Target population size.
catches	Catch time series. Cannot include NAs,
MVP	Minimum Viable Population Size; '4 * num.haplotypes'

Value

Vector of differences between predicted population and target population.

Examples

TARGET.K(r_max, K, N1, z, start_yr=start_yr, num_Yrs=bisection.Yrs,
         target.Pop=target.Pop, catches=catches, MVP=MVP)

antarctic-humpback-2019-assessment/HumpbackSIR documentation built on Nov. 6, 2023, 6:07 p.m.