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Beaked Redfish - East Greenland and Icelandic Slope, 2012
Marine Resource  Fact Sheet
ICES Advice 2012
Beaked Redfish - East Greenland and Icelandic Slope, 2012
Fact Sheet Citation  
Beaked Redfish (Sebastes mentella) in Division Va and Subarea XIV (Icelandic Slope stock)
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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Species:
FAO Names: en - Beaked redfish, fr - Sébaste du Nord, es - Gallineta nórdica, ru - Клювач
Geographic extent of Beaked Redfish - East Greenland and Icelandic Slope
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Management unit: Yes
 
 
Habitat and Biology
Depth zone: Slope (200 m - 1000 m).   Vertical distribution: Demersal.  


Sebastes mentella is a species with late maturation (matures between 10 and 14 years old), slow growth (can get older than 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.

Subarea XIV in Greenland waters is believed to be an important nursery area for S. mentella found in Icelandic waters, but data to estimate the magnitude of this contribution are not available.
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


Beaked redfish is taken by Icelandic trawlers using bottom trawl on the continental slope at depths between 450 and 700 m. Small amounts (<2%) of S. marinus are caught in the fishery and are possibly classified as beaked redfish in the catches.

The average annual catches in 2001–2011 have been about 20 thousand tonnes.
Catch distribution Total landings (2011) = 13 kt, 100% bottom trawl.
Assessment
 
Scientific Advice

The 2011 data (landings and survey) do not change the perception of the stock and give no reason to change the advice from that given last year: ICES advises that catches should be no higher than 10 000 t. This value should be a starting point for the adaptive part of a management plan”.
Overall Assessment Results
Figure 2.4.8.1 Beaked redfish (Sebastes mentella) in Division Va and Subarea XIV (Icelandic slope stock). Left: Landings (thousand tonnes, 1978–2010). Right: Survey biomass in Division Va (Autumn survey).
Assessment Model

Quality consideration


There are a number of uncertainties in the assessment of Sebastes mentella. The lack of long time-series of abundance indices prevents the determination of stock status.

Scientific basis

Assessment type Trend-based assessment.
Input data Survey index (Autumn survey Division Va).
Discards and bycatch There are no discard data, but discarding is not considered to be a major problem.
Indicators None.
Other information Stock benchmarked in 2012, but no assessment method agreed.
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 2.4.8.1

Available survey biomass estimates indicate that in Division Va the biomass shows no trend in recent years. No survey biomass estimates where available for 2011.
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 Division Va and Subarea XIV (Icelandic slope stock). Report of the ICES Advisory Committee, 2012. ICES Advice, June 2012. Click to openhttp://www.ices.dk/committe/acom/comwork/report/2012/2012/smn-con.pdf
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