This report details an exploration of the decision context for land use change as an adaptation to climate change in the primary industries. This project focuses on the dynamic interactions between values, rules, and knowledge used by decision makers. The aim is to support adaptation planning in the primary industries, by contributing to the evidence base, and enhance capability and capacity for responding to the risks and opportunities due to climate change.

The integration of the results of spatially explicit marine science research projects can be facilitated when the different outputs use the same spatial projection and spatial grids which can nest into each other. Wood et al. (2020) used an equal area projection for the New Zealand marine environment and proposed a central point through which all grids should intersect. We provide the R code and reference to an R package which creates such grids as a baseline for future researchers.

The estimated year class strength (YCS) of 1+ and 2+ snapper from a November 2020 (Hauraki Gulf) and February 2021 (Bay of Plenty) trawl survey were all well above the long-term average. Coefficients of variation (CV) for pre-recruit snapper were reasonable, except for 1+ snapper in the Bay of Plenty (CV = 38.5%). Surveys used a stratified two-phase design optimised for pre-recruit snapper. These surveys may also have potential to monitor abundance of recruit snapper and other inshore species.

This report presents available New Zealand commercial fishery catch-at-age data for hake (Merluccius australis) caught by trawl and ling (Genypterus blacodes) caught by trawl and longline, up to the 2019–20 fishing year, and bottom trawl survey catch-at-age data sets for both species up to the summer 2020-21.