The Plenary Report summarises biological, fishery, stock assessment and stock status information for 80 species or species groups, each of which is split into 1-10 stocks. The Plenary takes into account the most recent data and analyses available to Fisheries Assessment Working Groups (FAWGs) and the Fisheries Assessment Plenary and also incorporates relevant analyses undertaken in previous years. This page enables you to search through all plenary reports since 2006.
There are no new assessment results from 2008 for these oreo stocks.
Black oreo
The stock assessment of OEO 4 black oreo was considered unreliable and was not accepted. However,
abundance indices from standardised CPUE analysis suggests that there was a decline in the stock through the 1980s and 1990s. It is not known if recent catch levels or the current TACC are sustainable or if they are at levels that will allow the stock to move towards a size that will support the maximum
sustainable yield.
Smooth oreo
The OEO 4 smooth oreo stock assessment was updated in 2007. Three final runs are reported for the
stock.
The model estimates of mid-year mature biomass in 2005
suggests that there is not an immediate sustainability issue with this stock. However, there are
considerable uncertainties associated with this assessment described in section 4.3.6 above. The main
uncertainty is that substantial proportions of the abundance in each acoustic survey are attributed to
layer marks which are generally not fished by the commercial fishery. Also, standardised CPUE in the larger east fishery has declined in recent years.
Southland smooth oreo fishery (OEO 1/OEO 3A) Current and virgin biomass for smooth oreo, in Southland (OEO 1/OEO 3A), were estimated in 2004 using a new CASAL stock assessment. These biomass estimates are uncertain because of the paucity of observer length frequency data, the poor quality of recent catch data resulting from area misreporting, and the lack of fishery-independent abundance estimates and the consequent reliance on commercial CPUE data for abundance indices. Therefore, quantitative biomass estimates are not reported here and are not considered suitable as a basis for providing management advice. But the analysis suggested that the mature virgin biomass was probably small, less than 21 000 t, and that the stock was unlikely to be able to support a large fishery. Five year projections to estimate future mature and vulnerable biomass were subject to the same data problems as the biomass estimates. However, the Plenary concluded that catches at the level of the 2000–01 annual catch (1010 t) are probably not sustainable.
Pukaki Rise smooth oreo fishery (part of OEO 6) Current and virgin biomass for smooth oreo, on Pukaki Rise (part of OEO 6), were estimated for the first time in 2006. These biomass estimates are uncertain because of the lack of fishery-independent abundance estimates and the consequent reliance on commercial CPUE data, and because of the lack of biological parameter e
Southland smooth oreo fishery (OEO 1/OEO 3A)
Current and virgin biomass for smooth oreo, in Southland (OEO 1/OEO 3A), were estimated in 2004 using a new CASAL stock assessment. These biomass estimates are uncertain because of the paucity of observer length frequency data, the poor quality of recent catch data resulting from area misreporting, and the lack of fishery-independent abundance estimates and the consequent reliance on commercial CPUE data for abundance indices. Therefore, quantitative biomass estimates are not reported here and are not considered suitable as a basis for providing management advice. But the analysis suggested that the mature virgin biomass was probably small, less than 21 000 t, and that the stock was unlikely to be able to support a large fishery.
Five year projections to estimate future mature and vulnerable biomass were subject to the same data problems as the biomass estimates. However, the Plenary concluded that catches at the level of the 2000–01 annual catch (1010 t) are probably not sustainable.
Pukaki Rise smooth oreo fishery (part of OEO 6)
Current and virgin biomass for smooth oreo, on Pukaki Rise (part of OEO 6), were estimated for the first time in 2006. These biomass estimates are uncertain because of the lack of fishery-independent abundance estimates and the consequent reliance o
