Impl_SM2: Csirke_MacCall's CPUE model

In ErlendNilsen/MSEtools: A collection of tools used when building (generalized) MSE models

Description

Csirke_MacCall's catch pr unit effort (CPUE) model. Assumes that catchability (q) increase as population density (or biomass) decreases.

Usage

Impl_SM2(Effort = 3, alpha = 0.13, beta = 0.1, Pop_state = 10,
  Est_Pop_state = 10, c = 10)

Arguments

Effort	defines the effort, that will be multiplied by q to estimate total catch
alpha	Parameter is catchability model
beta	Parameter in catchability model
Pop_state	Population abundance (or biomass)
Est_Pop_state	Estimated population size emerging from observation model (i.e. monitoring)
c	Threshold where harvesting is abondend

Details

Modified to include lower threshold where harvest is abondened, determined from an observation of population state erging from an observation model. This is a shortcut, because such thresholds are most often determined in a harvest decision model.

Value

H_I Number of harvested individuals (or harvested biomass)

ErlendNilsen/MSEtools documentation built on May 6, 2019, 4:03 p.m.