Fisheries reports and stock statistics
Fisheries New Zealand reports on the status of fish stocks and fisheries in New Zealand waters.
Annual stock assessment
Each year, we assess the status of as many fish stocks and fisheries as possible against the requirements of the Harvest Strategy Standard for New Zealand Fisheries.
Read the Status of New Zealand's Fisheries 2017 report [PDF, 2.3 MB]
Find out more
- Guidelines for the release of fisheries information [PDF, 359 KB]
- The Harvest Strategy Standard for New Zealand Fisheries 2008 [PDF, 309 KB]
- New Zealand's Quota Management System
- Detailed stock status information for individual stocks
Aquatic Environment and Biodiversity Annual Review
A summary of environmental interactions between the seafood sector and the aquatic environment
The Aquatic Environment and Biodiversity Annual Review (AEBAR) 2015 is a summary of environmental interactions between the seafood sector and the aquatic environment.
This, the 2014 edition of the Aquatic Environment and Biodiversity Annual Review (AEBAR), expands and updates previous editions. It summarises information on a range of issues related to the environmental effects of fishing and aspects of marine biodiversity and productivity relevant to fish and fisheries. This review is a conceptual analogue of the Ministry’s annual reports from the Fisheries Assessment Plenary. It summarises the most recent data and analyses on particular aquatic environment issues and, where appropriate, assesses current status against any specified targets or limits.
Whereas the reports from the Fisheries Assessment Plenary are organised by fishstock, the Aquatic Environment and Biodiversity Annual Review is organised by issue (e.g. protected species bycatch, benthic impacts), and almost all issues involve more than one fishstock or fishery.
This AEBAR document summarises information and, where appropriate, assesses current status against any specified targets or limits, on a range of issues related to the interactions between the seafood sector and the marine environment. This edition features some chapters updated from 2012 as well as new chapters on Chondrichthyans (sharks, rays and chimaeras), the ecological impacts of aquaculture, and Hector’s / Maui’s dolphins.
This is the second Aquatic Environment and Biodiversity Review (AEBAR). It summarises information on a range of issues related to the environmental effects of fishing and aspects of the marine environment and biodiversity of relevance to fish and fisheries. The review summarises the most recent data and analyses on particular aquatic environment issues and, where appropriate, assesses current status against any specified targets or limits.
The Aquatic Environment and Biodiversity Annual Review (AEBAR) summarises information on a range of issues related to the environmental effects of fishing and aspects of the marine environment and biodiversity of relevance to fish and fisheries. Developed over three years, this report summarises the most recent data and analyses on particular issues and, where appropriate, assesses current status against any specified targets or limits.
Aquatic Environment & Biodiversity Reports (AEBR)
The deepwater Tier 1 and Tier 2 target fishstock footprint for fishing years 2008–17 was estimated at 180 100 km2. This 10-year footprint contacted 4.4% of the Territorial Sea and EEZ seafloor area and 13% of the seafloor open to fishing, down to 1600 m. Tier 1 fisheries accounted for 87%, with hoki effort contributing 42%. The 2017 footprint covered 48 203 km2, lower than the 10-year median of 49 845 km2. The aggregated swept area from all bottom-contacting trawls for 2017 was 94 500 km2.
This report summarises and synthesises the population estimate, and demographic parameter estimate components of project PRO200601: Data collection of demographic, distributional and trophic information on selected seabird species to allow estimation of effects of fishing on population viability. The project started in 2006-07 and continued until 2010-11 and comprised work on a range of surface and burrow-nesting seabird species at The Snares, Antipodes Island and the Chatham Islands.
This work compiles available benthic invertebrate records for Benthic Protection Areas and Seamount Closure Areas around New Zealand. Several BPAs are well-described, but most require more sampling to improve knowledge of the biodiversity that is protected. Spatial planning software “Zonation” is used with a variety of data sources to illustrate how such an approach could be used to evaluate BPA efficacy, and improve the effectiveness of future protection measures.
The present study provides estimates of seabird captures in commercial trawl and longline fisheries in New Zealand’s Exclusive Economic Zone. Estimates were obtained from statistical models that integrated fishing effort and observer data. The current estimates update previous analyses to the 2016–17 fishing year. In this most recent fishing year, an estimated total of 4210 (95% credible interval: 3508–5296) seabirds were captured in New Zealand’s trawl and longline fisheries.
Data on sea lion dives was used to construct a model that represents the process of sea lion exit from nets via Sea Lion Exclusion Devices. The model produces estimates of total sea lion deaths as a result of interactions with trawls, including any animals that run out of air after exiting the net. Under a range of assumptions, the results suggest scalers of between 1.2 and 1.5 for estimating total deaths from observed deaths.
A SEFRA model was developed for female New Zealand sea lions at the Auckland Islands. Inputs to the model included: the estimated at-sea spatial density of female sea lions, and cryptic mortality priors relating to SLED use. Across the last 3 years assessed, the estimated annual risk ratio across all Auckland Islands fisheries was 0.24 (95% credible interval (CI) = 0.11–0.47); consistent with population recovery to 97.5% of unimpacted status when assuming deaths at the upper 95% CI level.
Population models were developed for New Zealand sea lions at the Auckland Islands, including current demographic data. The base model was used to estimate an annual PST of 26 females. Future fishery deaths at the PST were estimated to result in a mature female population in 2025 that was 3.9% to 5.0% lower than that estimated in the absence of future squid fishery (SQU 6T) deaths; compared with 0.5% to 1.0% lower when future deaths were consistent with deaths estimated for the recent period.
A dynamic Bayesian modelling framework (including user interface) was developed for the assessment of unobservable mortality (e.g. due to carcass loss during net retrieval) of New Zealand sea lions that interact with trawls using sea lion exclusion devices. A base case model suggested that the total fishery-related deaths are underestimated by a factor of 1.15 (95% credible interval: 1.05-1.31) and 1.60 (95% credible interval: 1.20-2.63) for bottom trawls and mid-water trawls, respectively.
New Zealand Aquatic Environment and Biodiversity Report No. 214. 168 p.
A spatial risk assessment of threats was undertaken for Hector’s and Māui dolphins, to inform a revised Threat Management Plan (TMP) for the species. A Bayesian risk model was developed using the spatially-explicit fisheries risk assessment (SEFRA) approach, incorporating revised estimates of Hector’s and Māui dolphin spatial density and intrinsic population growth rate. The risk model was used to estimate spatial overlap, annual deaths and risk for commercial fisheries and lethal non-fishery threats, including toxoplasmosis. Spatial overlap was estimated for other threats.
New Zealand Aquatic Environment and Biodiversity Report No. 216.
An individual-based population model was fitted to genetic capture-recapture data collected during 2001-16 from Māui dolphins (Cephalorhyncus hectori maui), to estimate population size and trends. The population is estimated to be declining despite declining mortality rates. Forward projections under various scenarios imply that a further reduction of anthropogenic mortality of at least 50% is required to arrest population decline and avert extinction, regardless of the main source of the mortality, which is suspected to be fisheries bycatch and/or disease.
This document provides consistent and clear guidance for the benthic monitoring and management of salmon farms in the Marlborough Sounds (NZ). The protocol for conducting seabed surveys, as well as the compliance framework are contained within, and are based around an agreed set of environmental quality standards (EQS). This is a living document that is reviewed, updated and amended as required. It was initially released in 2015, and the 1.1 version reflects revisions resulting from its first review in 2018.
This report is a summary of work to develop a coherent dataset of benthic invertebrate distributions on Chatham Rise based on seabed photographic surveys. The dataset spans the full extent of Chatham Rise in depths from 40 m to 1850 m, combining analyses of 358 seabed transects from five surveys. The primary purpose of the dataset is to enable development of improved predictive models of faunal distributions that can be used to inform ecosystem-based management of the region.
This report summarises bycatch and discards in hoki, hake, ling, silver warehou, and white warehou trawl fisheries for 1990–91 to 2016–17, based on analysis of fisheries observer and commercial catch effort data. Javelinfish, other rattails, and spiny dogfish were the main bycatch species recorded by observers. Total annual bycatch for the period ranged from 17 500 t to 49 000 t; total annual discards (for 2002–03 to 2016–17) were 5000 t to 25 000 t and decreased significantly after 2002–03.
An understanding of marine animals’ movements is paramount for their effective management and conservation, especially with a changing climate. This project’s aim was to produce south Pacific Ocean carbon and nitrogen isotopic maps, referred to as “isoscapes”, to improve our understanding of species foraging habits and movements in marine ecosystems. The geographical variation in these isoscapes, over varying spatial scales, can contribute to many future BRAG/MPI projects.
New Zealand Aquatic Environment and Biodiversity Report No. 217. 62 p.
This study provides an indicative assessment of vessel traffic and seismic survey related noise. Vessel AIS data for the year of July 2014 to June 2015 was used to determine density and speed grids by vessel category. JASCO’s cumulative vessel noise model was used to model the sound from 15 vessel categories and two marine seismic surveys during representative summer and winter months in 1-minute time steps. Results are presented as maps, animations and plots of sound levels at static locations.
New Zealand Aquatic Environment and Biodiversity Report No. 215. 18 p.
A Bayesian Māui dolphin population model was developed integrating information from genetic “mark-recapture” and population size estimates. Model runs incorporated estimates of historical annual deaths from commercial fisheries and toxoplasmosis obtained from a separate spatial risk assessment. These models were then used to simulate the effects of estimated threat-specific mortality rates on future population growth.
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