A simulation testing framework was developed to evaluate and compare the performance of harvest control rules (HCRs) for 4 scampi stocks SCI 1, SCI 2, SCI 3, and SCI 6A. The harvest control rule evaluation (HCRE) framework uses CASAL stock assessment models as operating models and projects the simulated populations forward by applying an HCR each year to determine total annual catch. The framework is generalised and can be used with any CASAL model that has at least one CPUE index to project.
This report describes bycatch of non-protected invertebrates from commercial fisheries and research trawls. Over 660 distinct taxa were identified which contribute to the ongoing discovery and taxonomic description of the New Zealand biodiversity. Specimen records and distribution points inform fisheries interactions with non-target benthic invertebrate bycatch and contribute to research on spatial planning and development of ecological risk assessments of fishing impacts on benthic habitats.
This report updates and analyses information for the barracouta fishery that primarily operates around the Southland area, Stewart-Snares shelf, and Auckland Islands (BAR 5), with data up to the 2014–15 fishing year. Catches in BAR 5 exceeded the TACC six times between 2004–05 and 2014–15. Observer length frequency data show consistent recruitment. Standardised annual CPUE indices had similar trends, with a large increase in biomass in 2006–07 and a relatively high biomass in 2007–08 to 2014–15.
Age data from samples of the commercial catch of orange roughy (Hoplostethus atlanticus) taken from the Lord Howe Rise in 1989, 1990, 1992, 1993, 2013, and 2015 are presented.