Bespoke stock assessment
sbt
An age-structured southern bluefin tuna assessment model developed for CCSBT in RTMB, supporting frequentist and Bayesian inference, simulation, and projections.
Open package websiteSoftware grounded in practice
Built for real analyses and real decisions
These tools grow out of active stock assessments, management strategy evaluation, mapping, and statistical diagnostics. Each package is designed to make complex quantitative work more transparent, repeatable, and useful.
Select any hex sticker to open the package website, including documentation, examples, and function references.
Assessment systems
Population models
Rock lobster assessment
decamod
A length-structured RTMB operating model for New Zealand rock lobster stock assessments, with maximum-likelihood and Bayesian inference.
Open package website
General population assessment
opal
The open population assessment library: a modular RTMB framework for transparent, reproducible fisheries stock assessment.
Open package websiteThe southern bluefin tuna featured in the sbt sticker was painted by Joanne Webber Artist.
Supporting software
Mapping & diagnostics
Spatial science
nzsf
New Zealand Spatial Features provides a straightforward, layered approach to producing scientific maps in New Zealand waters.
Open package website
Bayesian diagnostics
influ2
Influence metrics and diagnostic plots for Bayesian models fitted with brms, including CDI, step, bubble, and comparison plots.
Open package websiteEvidence behind the tools