- Appendix one – Response to individual inquiry [PDF, 818 KB]
Data on elver catches of longfin and shortfin eels from hydroelectric barriers were collected during the 2018–19 to 2021–22 seasons. Catches contained moderate shortfin numbers, but moderate-high longfin numbers. Combined recruitment indices from all sites and seasons showed that recruitment of both species is variable within and between sites but remained stable, consistent with previous studies, indicating that recruitment of elvers has remained stable within the time frames of the datasets.
This report summarises the ling stock off the west coast South Island (LIN 7WC) and fishery. It describes the spatial structure of the stock, biological parameters, and trawl and longline standardised catch per unit effort (CPUE). Statistical Area 032 was reassigned to LIN 7WC based on the continuity of catch locations. The trawl and longline fishery CPUE and survey biomass showed similar patterns from 2000, with a decline from 2012. All three indices were considered in the stock assessment.
This report investigated the spatial and temporal structure of arrow squid (Nototodarus sloanii and N. gouldi) in New Zealand. Five potential stocks were defined. Estimates of growth rate were consistent with previous estimates. Spatial-temporal standardised CPUE fortnightly indices were developed and could be predicted relatively well by environmental variables. Preliminary population models showed recruitment was well estimated but initial biomass was highly uncertain.
A Management Strategy Evaluation (MSE) was conducted for hoki based on the recent (2022) stock assessment model. The MSE evaluated a set of Harvest Control Rules that specified a target biomass range and varied annual fishery catches relative to fluctuations in eastern and western stock biomass.