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NZ stock assessments

17 Jun 2013
Hoki is the ‘star’ performer. Credit: N. Bagley/NIWA

Hoki is the ‘star’ performer. Credit: N. Bagley/NIWA

The latest comprehensive scientific assessment of the status of New Zealand’s fisheries has been released.

“Many of the assessments indicate there is scope for increases in current catch limits,” says Dr Pamela Mace, Principal Advisor Fisheries Science for the Ministry for Primary Industries. “Hoki is the “star” performer. A few short years ago, there was concern that the western stock had become depleted. Science has driven strong and decisive management action and ensured the full restoration of hoki New Zealand-wide, even surpassing management benchmarks.”

Highlights of the fisheries assessments include:

  • Hoki: Both the eastern and western stocks have increased over seven consecutive years. The abundance of both stocks is now near or above the upper bound of the management target range.
  • Chatham Rise orange roughy: A 2012 survey of this stock confirmed the existence of a large new spawning area first discovered in 2011. This has substantially improved the status of the orange roughy stock. The abundance of the stock has further increased slightly since last year.
  • West Coast South Island ling and hake: Both of these stocks have been assessed to be well above their management targets.
  • East Northland, Hauraki Gulf and Bay of Plenty snapper: While these stocks have increased by up to 70% over the last 15-25 years, they are still only at about half of the level of their current management target. Recent numbers of young fish coming into the population - known as recruitment - have been above average. Five-year projections indicate all three stocks will increase slowly at current catch levels if good recruitment continues.
  • North of the South Island snapper: There appears to have been a marked increase in recruitment since 2007, and this has led to a large increase in catch rates over the last two years.
  • Southland blue cod: This is the first time a fisheries assessment has been conducted for this stock; it indicates the fishery is performing well and the stock is optimally-utilised.
  • South of the South Island paua: The stock appears to be rebuilding towards its management target, although there is uncertainty about the level of the stock and the rate of rebuild. There is no indication of a sustainability risk for the stock under current catch levels.
  • East Coast North Island scampi: The population on the lower half of the east coast North Island is now well above its management target.

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Hoki is the ‘star’ performer. Credit: N. Bagley/NIWA

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