README.md

In vquennessen/densityratio: Using Density Ratios to Help Manage Fisheries In And Around Marine Reserves

densityratio

The goal of densityratio is to compare the performance of density ratio control rules (DRCR) using transient and static target density ratios in terms of biomass, yield, spawning stock abundance, age structure, or some other biological reference. Different DRCRs may sample different individuals (all vs. only mature individuals), different areas (all areas vs. only areas far from the reserve), different amounts of time (1 year or multiple), may have a different final target density ratio, and may use a static or a transient final target density ratio. Alternatively, it can be used to calculate simpler life history traits for a given species, such as length at age, weight at age, proportion mature at age, selectivity at age, the stable age distribution, and more.

Installation

You can install the development version from GitHub with:

# install.packages("devtools")
devtools::install_github("vquennessen/densityratio")

Example 1: Length at Age of Black Rockfish (2015)

This is a basic example which shows you how to solve a common problem:

library(densityratio)
## basic example code

Example 2: Relative yield after reserve implementation given static and transient control rules (Black Rockfish 2015)

This is a basic example which shows you how to solve a common problem:

library(densityratio)
## basic example code

Don’t forget to commit and push the resulting figure files, so they display on GitHub!

vquennessen/densityratio documentation built on Aug. 28, 2022, 5:36 p.m.