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Beaked Redfish - Rockall Bank and Reykjanes Ridge (upper slope), 2012
Marine Resource  Fact Sheet
ICES Advice 2012
Beaked Redfish - Rockall Bank and Reykjanes Ridge (upper slope), 2012
Fact Sheet Citation  
Beaked Redfish (Sebastes mentella) in Subareas V, XII, XIV and NAFO Subareas 1+2 (Shallow Pelagic stock <500 m)
Owned byInternational Council for the Exploration of the Sea (ICES) – More
Monitoring periodThis marine resource is reported in FIRMS from 2009. Previously monitored as:
.
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Beaked redfish, fr - Sébaste du Nord, es - Gallineta nórdica, ru - Клювач
Geographic extent of Beaked Redfish - Rockall Bank and Reykjanes Ridge (upper slope)
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Management unit: Yes
 
 
Habitat and Biology
Depth zone: Slope - Upperslope (200 m - 500 m).   Vertical distribution: Pelagic.  


Sebastes 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. Hence it is considered to be vulnerable to overexploitation. It can therefore only sustain low exploitation rates and management should be based on that consideration.
Geographical Distribution
Jurisdictional distribution: Shared between nations

Water Area Overview
Spatial Scale: Sub-Regional


Ecoregion: Iceland and East Greenland.
Geo References
Resource Structure
Considered a single stock: Yes
Exploitation
 

The fisheries


Nursery areas for the stock are found at 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.
Catch distribution Total catches (2011) = 568 t, where 100% are landings (100% pelagic trawl). No discards, industrial bycatch, or unaccounted removals.

Effects of the fisheries on the ecosystem

These fisheries have no effect on the ecosystem apart from the removal of the target species. The pelagic fisheries on S. mentella generally have little or no bycatch.
Assessment
 
Scientific Advice

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 precautionary considerations that no directed fishery should be conducted and bycatch of this stock in non-directed fisheries should be kept as low as possible.”
Overall Assessment Results
Figure 2.4.9.1 Beaked redfish (Sebastes mentella) in Subareas V, XII, and XIV and NAFO Subareas 1+2 (Shallow pelagic stock <500 m). Left: Landings (tonnes), Right: Overview of acoustic survey indices (thousand tonnes) from above the scattering layer (red filled circle), trawl estimates within the scattering layer and shallower than 500 m (black triangle), and aerial coverage (NM2) of the survey (black open circle) in the Irminger Sea and adjacent waters.
Assessment Model

Quality 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 acoustic index shows a sharp decline of the stock during the 1990s and the stock remains low.

ICES again had difficulties in obtaining catch estimates and landing data from some ICES member countries, and specially data disaggregated by depth. The Russian Federation has decided for the years 2011 and 2012 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. There is a need for special action through NEAFC and NAFO to provide ICES with timely and complete information that might lead to more reliable catch statistics. Furthermore, ICES recommends that all nations should report depth information on a haul basis in accordance with the NEAFC logbook format.

Scientific basis

Assessment type No analytical assessment, qualitative assessment.
Input data Biomass and abundance survey indices obtained in biennial acoustic and trawling survey; biological data collected on this and other surveys and from commercial catches.
  Commercial indices (cpue, landings).
Discards and bycatch Not included in the assessment.
Indicators None.
Other information Stock benchmarked in 2012.
Working group report NWWG
Management
Management unit: Yes


Management plans


There are no explicit management objectives for this stock.
Biological State and Trend
Exploitation rate: Unknown
Abundance level: Unknown
Figure 2.4.9.1

The biomass index from the acoustic survey in 2011 indicates that the stock has declined to roughly 5% of the estimates at the beginning of the survey time-series in the early 1990s. 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 (Shallow pelagic stock < 500 m). Report of the ICES Advisory Committee, 2012. ICES Advice, June 2012. Click to openhttp://www.ices.dk/committe/acom/comwork/report/2012/2012/smn-sp.pdf
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