Research and science contribute to the management of New Zealand's fish stocks. However, for many of our fisheries there is a dearth of information that can be reliably used to guide the science process. To ensure a balanced management approach the New Zealand Sport Fishing Council works with a number of agencies and organisations to achieve our goal of "more fish in the water".
Having abundant fisheries thriving in a healthy marine environment would provide for all New Zealander's social, environmental, economic and cultural well-being.
Over time the NZSFC will add to this collection of research and science papers, reports and data sheets. If you have any information that could contribute to this page please feel free to contact us by email. Meantime, click on the right hand image to read the reports.
The graphs provided in this report enable you to follow the yearly development and growth of kingfish. You can download a copy of the report at the above link.
This research looked into the association of nursery habitats and how they contribute to the survival and growth of juvenile snapper in New Zealand. Researchers deployed artificial seagrass beds then examined the juvenile snapper using video observation, netting and diet analysis. Worth reading this interesting document!
Parsons et al. (2015). Mechanisms Explaining Nursery Habitat Association: How Do Juvenile Snapper Benefit from Their Nursery Habitat? PLoS ONE 10(3): e0122137. doi:10.1371/journal.pone.0122137
Blue Water Marine Research report it has been a good year for kingfish catches. Kingfish is an increasingly popular target species for recreational fishers and divers. This project is collecting kingfish length and age data to monitor recruitment and exploitation rates in 2014-15. This will be compared to a similar survey five years ago. That survey found large numbers of 5 and 6 year olds, but few teenagers, especially in inshore waters. Areas like White Island are still producing some of the larger, older fish to be found in New Zealand.
The good news is the blue water is moving closer in to the coast after a cool spring. The first marlin of the season was caught on 6 December 2014. This fish was caught by Kyle Riding wide of the Poor Knights and was tagged and released.
Since the 2013-14 season began on 1 July 2013 there have been 26 tag recoveries advised. In the same period another 1400 tagged fish have been added to the database. The recaptured fish comprised 17 kingfish, 2 striped marlin, 3 mako sharks, 1 x broadbill swordfish, 1 x southern bluefin tuna, 1 x hammerhead shark and 1 x bronze whaler shark.
Release and recapture data for the 2012-13 season are summarised in this report and compared with data from previous seasons. Particular recaptures that provide growth or movement information of significance or interest are described. The number of fish tagged and released in New Zealand this season (2263) was less than the ten year mean.
As of 1 June 2012 we have been advised of 50 tagged fish recaptured since July 2011. The recaptured fish comprise 40 kingfish, 6 mako sharks, 3 blue sharks and 1 swordfish.
The longest distance recorded this season was 1520 nautical miles from original tag site. This feat was achieved by a 42.8kg mako shark caught west of Melbourne, Australia, 399 days after being tagged off New Plymouth in March 2011.
This research found productivity decreases as fishing intensity increases and high biomass species are removed from the benthic habitat. It also found that scavengers and small-bodied organisms, such as worms, dominate heavily fished areas. Major changes in habitat can lead to changes in the composition of the resident fish species.
Kaiser et al. (2002). Modification of marine habitats by trawling activities: prognosis and solutions. Kaiser MJ. April 2002.
The New Zealand gamefish tagging programme is a cooperative project between the Ministry of Fisheries, the New Zealand Sport Fishing Council, its affiliated clubs and anglers.
It provides information on the size and distribution of fish released by recreational fishers. Recaptures provide information on distance and direction of movement, time at liberty, and in some circumstances, the average migration rate of the fish involved.
There have been about 16,000 kingfish tagged and released in New Zealand since the Yellowtail KIngfish Tagging Programme started in 1975. Most of these have been released in east Northland and the Bay of Plenty in the last 20 years.
There have been 1,200 recaptures reported, a recapture rate of 7.5%.
Tag and release is an important part of deep sea angling in New Zealand.
New Zealand anglers tag and release about 1000 marlin and 300 sharks each year. This shows the commitment of recreational anglers to the conservation of the resource. The tagging data is critical for research into the growth and movement of these fish, which is difficult to collect in any other way.