This report describes the survey estimates for blackfoot pāua landed by amateur fishers from land-based access points in the Kaikōura Marine Area, Ward Beach, and Marfells Beach during a 3-month open season from 1 December 2021. This area had been closed to recreational and commercial fishers for five years following significant earthquakes caused coastal uplift and habitat damage. The survey also recorded catch of red rock lobster and estimated land-based harvest.
This report describes the results of the blue cod (Parapercis colias) random-site potting survey carried out in Marlborough Sounds in October 2021. Estimates are provided for population abundance, size and age structure, sex ratio, total mortality (Z), and spawner biomass-per-recruit ratio. This is the third full random-site blue cod survey carried out in the Marlborough Sounds and the tenth survey overall, with nine fixed-site surveys carried out between 1995 and 2017.
This report describes the results of the blue cod (Parapercis colias) random-site potting survey carried out in Marlborough Sounds in October 2021. Estimates are provided for population abundance, size and age structure, sex ratio, total mortality (Z), and spawner biomass-per-recruit ratio. This is the third full random-site blue cod survey carried out in the Marlborough Sounds and the tenth survey overall, with nine fixed-site surveys carried out between 1995 and 2017.
This report updates the Mid-East Coast orange roughy stock assessment for 2022. The fishery, observational data from trawl surveys, acoustic surveys, and age and length composition data, and the assessment model structure and assumptions are described. The stock was estimated to be below the depletion target range but slowly rebuilding. A hypothesis of skipped spawning was used to explain a high estimated age of first spawning. The assessment was accepted for providing scientific advice.
Commercial purse seine landings of Trachurus novaezelandiae from the Bay of Plenty purse seine fishery were sampled from length and age throughout the 2019–20 and 2020–21 fishing years. Catch curve total mortality estimates derived from the resulting age distributions suggest that levels of fishing mortality were sustainable in the areas fished. Age-length and length-weight parameter estimates are also provided by this report; these should be used instead of existing estimates for this species.