|Marine Resource Fact Sheet|
|Beaked Redfish - Rockall Bank and Reykjanes Ridge (deep slope), 2012|
|Beaked Redfish (Sebastes mentella) in Subareas V, XII, XIV and NAFO Subareas 1+2 (Deep Pelagic stock >500 m)|
Monitoring periodThis marine resource is reported in FIRMS from 2009. Previously monitored as:
|FAO Names: en - Beaked redfish, fr - Sébaste du Nord, es - Gallineta nórdica, ru - Клювач|
|Considered a single stock: Yes
Spatial Scale: Sub-Regional|
Management unit: Yes
Habitat and Biology
Depth zone: Slope - Deepslope (500 m - 1000 m). Vertical distribution: Pelagic. S. mentella
is a species characterized by slow growth, late maturation (matures between 10 and 14 years old), a long lifespan (>50 years), and a schooling behaviour. These characteristics make the species vulnerable to overexploitation. It can therefore only sustain low exploitation rates and management should be based on that consideration.
Jurisdictional distribution: Shared between nations
Water Area Overview
Spatial Scale: Sub-Regional
Ecoregion: Iceland and East Greenland.
Considered a single stock: Yes
Nursery areas for the stock are found on the continental slope off East Greenland. Technical conservation measures such as mandatory sorting grids in the shrimp fishery that have been in place for several years should be continued in order to protect the juvenile redfish.
Effects of the fisheries on the ecosystem
||Total catches (2011) are 47.5 kt, all landings (100% pelagic trawl). No discards, industrial bycatch, or unaccounted removals.
These fisheries are not considered to have an effect on the ecosystem apart from the removal of the target species. The pelagic fisheries on S. mentella
generally have little or no bycatch.
The advice for the fishery in 2013 is the same as the advice given in 2011 for the 2012 fishery: “ICES advises on the basis of the precautionary considerations that catches should be reduced to less than 20 000 t and a management plan should be developed and implemented
Overall Assessment Results
|Figure 18.104.22.168 Beaked redfish in Subareas V, XII, and XIV and NAFO Subareas 1+2 (Deep pelagic stock >500 m). Left: Landings (thousand tonnes). Right: Overview of survey indices from trawl estimates deeper than 500 m (blue line) and aerial coverage of the survey (black open circle) in the Irminger Sea and adjacent waters. |
Assessment ModelQuality consideration
Several data improvements are needed; better catch and landings data, better survey information, particularly within the deep scattering layer, and a recruitment index. However, the few available indices indicate a declining stock.
ICES again had difficulties in obtaining catch estimates and landing data from some ICES member countries, and specially data disaggregated by depth. For the years 2011 and 2012 the Russian Federation has decided on a unilateral quota that considers both redfish management units as a single stock. This unilateral quota nearly equals the total quota recommended by NEAFC. The Russian Federation so far has not facilitated depth disaggregated catch data to the NWWG, and this may affect the assessment. In February 2011 ICES launched a data call requiring better data from the countries participating in the redfish fishery, but the response was very limited. In spite of the best efforts there is a need for a special action through NEAFC and NAFO to provide ICES with timely and reliable catch statistics. Furthermore, ICES recommends that all nations should report depth information in accordance with the NEAFC logbook format.Scientific basis
||Biomass and abundance survey indices obtained in biennial acoustic and trawling survey.
|Discards and bycatch
||Not included in the assessment.
||Biological data collected on this and other surveys and from commercial catches.
||Stock benchmarked in 2012.
|Working group report
Management unit: YesManagement plans
There are no explicit management objectives for this stock.
Biological State and Trend
Exploitation rate: Unknown
Abundance level: Unknown
|Figure 22.214.171.124 |
Trawl survey estimates in 2009 and 2011 are lower than the average for 1999–2003 and near the lowest observed. These indices in combination with a marked decrease in landings since 2004 suggest that the stock has been reduced in the past decade. The exploitation rate for this stock is unknown.
Source of information
The above excerpts are from the first two pages of the ICES advice, the supporting information to this advice can be read in full at the following reference:
ICES. Beaked redfish (Sebastes mentella) in Subareas V, XII, and XIV and NAFO Subareas 1+2 (Deep pelagic stock >500 m). Report of the ICES Advisory Committee, 2012. ICES Advice, June 2012. http://www.ices.dk/committe/acom/comwork/report/2012/2012/smn-dp.pdf