This repository contains an R package for calculating morphometric condition indicators based on the residuals of length-weight relationships. The package also includes wrapper functions to generate morphometric condition indicators using the R package VAST (https://github.com/James-Thorson-NOAA/VAST). The code in this repository generates Groundfish Morphometric Condition Indicators for the Aleutian Islands, Bering Sea, and Gulf of Alaska Ecosystem Status Reports and juvenile and adult Pacific cod condition indicators for Ecosystem and Socioeconomic Profiles.
akfishcondition can be installed using the following code:
devtools::install_github("afsc-gap-products/akfishcondition")
Estimating morphometric condition using VAST package requires installation of the VAST package.
Fish length, weight, and design-based biomass index data are included in the package as built-in data sets.
- AI_INDICATOR
Data frame containing Aleutian Islands length-weight residual condition indicator based on AFSC summer bottom trawl survey data from 1986 to 2024.
- GOA_INDICATOR
Data frame containing Gulf of Alaska length-weight residual condition indicator (years: 1984-2023).
- EBS_INDICATOR
Data frame containing Eastern Bering Sea length-weight residual condition indicator based on AFSC summer bottom trawl survey data from 1999 to 2025.
- NBS_INDICATOR
Data frame containing Northern Bering Sea length-weight residual condition indicator based on AFSC summer bottom trawl survey data from 2010 to 2025
- PCOD_ESP
List containing data frames with adult and juvenile Pacific cod length-weight residual condition indicator from AFSC summer bottom trawl survey data from the eastern Bering Sea (1999-2023), Aleutian Islands (1986-2022), Gulf of Alaska (1984-2025). Length cut-offs between adults and juveniles are region-specific and based on Essential Fish Habitat thresholds.