|
Plenary (SWA_FINAL 08)
|
|
Plenary (SWA_07)
|
|
Plenary (SWA_06)
|
Title: Fisheries Assessment Plenary May 2017: Stock Assessments and Stock Status
82_SWA_2017.pdf
(1.0 MB)
The May 2017 Fisheries Plenary Report summarises fishery, biological, stock assessment and stock status information for 83 of New Zealand’s commercial fish species or species groups in a series of Working Group or Plenary reports. Each species or species group is split into 1-10 stocks for management purposes. SWA
|
Title: Fisheries Assessment Plenary May 2016: Stock Assessments and Stock Status
82_SWA_2016_FINAL.pdf
(1.0 MB)
The May 2016 Fisheries Plenary Report summarises fishery, biological, stock assessment and stock status information for 83 of New Zealand’s commercial fish species or species groups in a series of Working Group or Plenary reports. Each species or species group is split into 1-10 stocks for management purposes. SWA.
|
Title: Fisheries Assessment Plenary May 2015: Stock Assessments and Stock Status
82_SWA_2015_FINAL.pdf
(1.0 MB)
The May 2015 Fisheries Plenary Report summarises fishery, biological, stock assessment and stock status information for 82 of New Zealand’s commercial fish species or species groups in a series of Working Group or Plenary reports. Each species or species group is split into 1-10 stocks for management purposes. SWA
|
Title: Fisheries Assessment Plenary May 2015: Stock Assessments and Stock Status
82_SWA_2015_FINAL.pdf
(1.0 MB)
The May 2015 Fisheries Plenary Report summarises fishery, biological, stock assessment and stock status information for 82 of New Zealand’s commercial fish species or species groups in a series of Working Group or Plenary reports. Each species or species group is split into 1-10 stocks for management purposes. SWA.
|
|
The May 2014 Fisheries Plenary Report summarises fishery, biological, stock assessment and stock status information for 82 of New Zealand’s commercial fish species or species groups in a series of Working Group or Plenary reports. Each species or species group is split into 1-10 stocks for management purposes. Volume 3 covers the Red Snapper to Yellow-eyed Mullet.
|
|
Since the 2008 Plenary report was published, no new stock assessments have been competed for SWA stocks but a mid-term review has been completed for the SWA 1 AMP.
SWA 1
SWA 1 has been managed with a TACC of 3000 t since October 2002 under the AMP. CPUE indices have previously been considered to be unreliable for SWA 1. However, the SWA bottom and midwater trawl index prepared in 2009 seems to be consistent with indications of good recruitment in 1993, 1994 and 1997, with strong year classes contributing to increased catch rates over the ensuing few years. The WG concluded that this CPUE index may be indexing SWA 1abundance.
This index shows a period of stable or slowly declining CPUE from 1986 - 1992, followed by a rapid increase in CPUE to levels twice the long-term average by 1996. High catch rates continued to 1998, dipped in 1999 and rose to high levels again in 2000. Thereafter CPUE declined back to about half historic average levels, and appears to have remained stable at that level since 2004.
Catch curve analyses indicate that the average exploitation rate on silver warehou in the WCSI hoki fishery is probably less than the natural mortality rate, indicating that the stock is not being overfished.
Annual catches have averaged 1480 t since the increase in TACC to 3000t in 2002–03 and catches at this level are likely sustainable in the short to medium term. However, it is n
|
|
This document summarises the most recent New Zealand fishery, biological, stock assessment and stock status information about silver warehou.
|
