Fishery Resources Monitoring System

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Redfish - North Western areas, 2012
Marine Resource  Fact Sheet
ICES Advice 2012
Redfish - North Western areas, 2012
Fact Sheet Citation  
Golden Redfish (Sebastes marinus) in Subareas V, VI, XII and XIV
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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Species:
FAO Names: en - Golden redfish, fr - Sébaste doré, es - Gallineta dorada, ru - Окунь золотистый
Geographic extent of Redfish - North Western areas
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Management unit: Yes
 
 
Habitat and Biology
Depth zone: Shelf (50 m - 200 m).   Vertical distribution: Pelagic.  


Sebastes marinus is a species with late maturation (matures between 10 and 14 years old) and slow growth (can get older than 50 years) and is hence considered to be vulnerable to overexploitation. It can therefore only sustain low exploitation 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


The majority of the golden redfish catch is taken in ICES Division Va, which has contributed 95–98% of the total landings since 1990. Between 90 and 95% of the golden redfish catch in Division Va is taken by bottom trawlers targeting redfish. The remaining catches are caught as bycatch in gillnet, longline, and Nephrops fishery. Average annual landings 2000–2011 have been 40 000 tonnes. S. marinus in Division Va is to a small extent caught in a mixed fishery with S. mentella (Icelandic slope).
Catch distribution Total landings (2011) = 44.8 kt, where 94% was taken by bottom trawls and 6% by other gear types. Discards considered very small.
Assessment
 
Scientific Advice

ICES advises on the basis of precautionary considerations that catches should be no more than 40 000 t.
Overall Assessment Results
Figure 2.4.7.1 Golden redfish (Sebastes marinus) in Subareas V, VI, XII, and XIV. Top left: Landings by area, Top right: Survey biomass (±1 standard error) from for Icelandic waters (spring survey). Bottom: Survey biomass and abundance indices for East and West Greenland. Left: Total biomass index, including one standard error. Right: Total biomass index split into pre-fishery recruits (17–30 cm) and fishable redfish (>30 cm).
Assessment Model

Quality consideration


Due to the aggregating behaviour of the species, survey indices are often largely composed of a few large hauls. This causes high CVs in the indices and large interannual fluctuation in estimates of biomass.

Scientific basis

Assessment type Trends-based assessment.
Input data Two survey indices (Icelandic spring survey since 1985 and autumn survey since 1996).
Discards and bycatch Not incorporated in the assessment, but very small.
Indicators Gadget model used as trend indicator.
Other information Faroese groundfish surveys since 1994 and 1996, German groundfish survey on the Greenland shelf since 1985. Benchmarked in February 2012, further review of the model settings needed before 2013.
Working group report NWWG
Management
Management unit: Yes


Management plans


The regulation is based on TAC in Iceland and in Greenland, but through an effort system in the Faroe Islands. The separation of golden redfish and Icelandic slope S. mentella in the quota was implemented in the 2010/2011 fishing season. The TAC in Greenland is set for redfish, with no distinction being made between S. marinus and S. mentella.
Biological State and Trend
Exploitation rate: Unknown
Abundance level: Full reproductive capacity
Figure 2.4.7.1

In Division Va the survey index (U) has been increasing since 2008 and is currently far above Upa. In Division XIVb (East Greenland) survey indices of both pre-fishery recruits and fishable size have increased in recent years. In Division Vb the Faroese groundfish survey indicates that the abundance has been decreasing since 2001.
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. Golden redfish (Sebastes marinus) in Subareas V, VI, XII, and XIV. Report of the ICES Advisory Committee, 2012. ICES Advice, June 2012. Click to openhttp://www.ices.dk/committe/acom/comwork/report/2012/2012/smr-5614.pdf
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