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Ling - Faroes Grounds
Marine Resource  Fact Sheet
ICES Advice 2009
Ling - Faroes Grounds
Fact Sheet Citation  
Ling in Division Vb (Faroes)
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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Species:
FAO Names: en - Ling, fr - Lingue franche, es - Maruca, ru - Мольва обыкновенная
Geographic extent of Ling - Faroes Grounds
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Reference year: 2008
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateUndefinedUncertain/Not assessed
Abundance levelUndefinedUncertain/Not assessed

Abundance indices suggest that ling in the management unit Vb is stable at a low level compared with the 1970s and 80s (Figures 9.4.10.3.2–9.4.10.3.3).
Habitat and Biology
Depth zone: Slope (200 m - 1000 m).   Vertical distribution: Demersal/Benthic.  

Geographical Distribution
Jurisdictional distribution: National

Water Area Overview
Spatial Scale: Sub-Regional

Geo References
Resource Structure
Considered a single stock: Yes
Exploitation
 

Factors affecting the fisheries and the stock

The major fishery is the Faroese and Norwegian longline fisheries, but there are also bycatches by other gears, i.e. trawls, gillnet, and handline. The Faroese landings have in the most recent years accounted for about 60–70% of the total landings of which around 60% are taken by longline, partly in directed ling fisheries, and 40% as bycatch by trawlers in fisheries for other groundfish. The Norwegian longliners’ catch has been declining the last three years and they take about 30–40% of the total ling landings. Other nations catch ling as a bycatch in trawl fisheries, contributing about 1–2% of total landings.
Assessment
 
Assessment Model
Methodology

Scientific basis

Cpue data from Norwegian longliners are available from 1973 and from Faroese longliners from 1986. Catch rates from two Faroese groundfish surveys have been available since 1994 and 1996. Age, length, and weight data have been available from sampling of the Faroese landings since 1996.

Comparison with previous assessment and advice

The advice in 2006 was ‘For Division Vb, effort should not be allowed to increase compared with the present level.’

The previous advice was based on longline cpue trends, which have not changed. Inclusion of survey cpue series supports this. Therefore there is no change in the advice.
Overall Assessment Results

Table 9.4.10.3.1.
Figure 9.4.10.3.2. Ling in Division Vb. Cpue (kg/1000 hooks) from commercial Faroese longliners >100 GRT and Norwegian longliners (NO).


Figure 9.4.10.3.3. Ling in Division Vb. Cpue (kg/h) with SE in the two annual Faroese groundfish surveys.

Reference Point
 

In common with other deep-water stocks, Ulim has previously been proposed at 0.2* virgin biomass and Upa at 0.5* virgin biomass (ICES, 1998). In the absence of abundance indices that correspond to the start of the fishery, the reference points cannot be calculated.
Scientific Advice

Single-stock exploitation boundaries

Cpue in Area Vb has been at a reduced level. ICES reiterates the Advice that effort should not be allowed to increase and that information should be collected that can be used to evaluate a long-term sustainable level of exploitation.
Management
 
Management Advice

Management considerations

The only species-specific management for Faroese fisheries of ling in Division Vb is the minimum landing size (60 cm). The exploitation is influenced by regulations aimed at other groundfish species, e.g. cod, haddock, and saithe. The fisheries by other nations are regulated by TACs.
Source of information
 
ICES.2009.Report of the ICES Advisory Committee, 2009. ICES Advice, 2009.
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