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| Marine Resource Fact Sheet |
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| Ling - Barents Sea, Norwegian Sea, Spitzbergen and Bear Island |
 | Ling in Subdivisions I and II (Arctic) |
| | Data Ownership | | This document provided, maintained and owned by International Council for the Exploration of the Sea (ICES) , is part of ICES Advice data collection. |
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| Related observations | Locate in inventory | | | | Species: | | FAO Names: en - Ling, fr - Lingue franche, es - Maruca, ru - Мольва обыкновенная |
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| Geographic extent of Ling - Barents Sea, Norwegian Sea, Spitzbergen and Bear Island
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| FAO Fishing Statistical Sub Areas |
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| 27.1 | Barents Sea (Subarea I) |
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| 27.2 | Norwegian Sea, Spitzbergen, and Bear Island (Subarea II) |
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| Main Descriptors | Considered a single stock: Yes
Spatial Scale: Sub-Regional
Reference Year: 2008 |
| Considered a single stock: A group of individuals in a species occupying a well defined spatial range independent of other stocks of the same species. It can be affected by random dispersal movements and directed migrations due to seasonal or reproductive activity. |
| Spatial Scale: Spatial scale contains a standard term such as Global, Regional (e.g. for the whole Atlantic), sub-regional (e.g. for a part of the Atlantic), national, local (for sub-national levels). |
| Considered a management unit: An aquatic resource or fishery is
declared as [Fishery] Management Unit if it is
effectively the focus for the application of selected
management methods and measures, within the broader
framework of a management system. According to the FAO
Glossary for Responsible Fishing, "a Fishery Management
Unit (FMU) is a fishery or a portion of a fishery
identified in a Fishery Management Plan (FMP) relevant
to the FMP's management objectives." FMU's may be
organised around fisheries biological, geographic,
economic, technical, social or ecological dimensions ,
and the makeup and attribute of a fishery management
unit depends mainly on the FMP's management
objectives. |
| Jurisdictional distribution: Jurisdictional qualifier (e.g.
"shared", "shared - highly migratory") of the aquatic
resource related with its spatial distribution. |
| Environmental group: Classification of the aquatic
resource according to the environmental group (e.g.
pelagic invertebrate, or demersal fish) to which the
species belong. |
| Reference Year: The last year considered in the assessment. |
| | | | | | Habitat and Biology Depth zone: Slope (200 m - 1000 m). Vertical distribution: Demersal/Benthic. Water Area Overview Spatial Scale: Sub-Regional Geo References  | | Geographic extent of Ling - Barents Sea, Norwegian Sea, Spitzbergen and Bear Island
| FAO Fishing Statistical Sub Areas | 27.1: Barents Sea (Subarea I) | | 27.2: Norwegian Sea, Spitzbergen, and Bear Island (Subarea II) |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Ling - Barents Sea, Norwegian Sea, Spitzbergen and Bear Island | FAO Major Fishing Areas | 27:
Atlantic, Northeast | | Large Marine Ecosystem Areas (LME) | 19: East Greenland Shelf | | 20: Barents Sea | | 21: Norwegian Shelf | | 22: North Sea | | 58: Kara Sea | | 59: East Greenland Shelf/Sea | | 60: Faroe Plateau | | 64: Arctic Ocean |
Resource Structure Considered a single stock: Yes Exploitation Factors affecting the fisheries and the stockNo information. Assessment Assessment Model Methodology Scientific basisLandings were available for all relevant fleets (Table 9.4.10.1.1). New discard data were not available. Length compositions/mean lengths were available from 1976 to the present, based on data from the Norwegian longliners. Catch and effort data for Norwegian longliners were available, both from the overall fleet and for a set of four vessels, “the reference fleet”, with which there is a special agreement on reporting for scientific purposes. These series are for the years 2000–2006. For the period 1971–1994, a series of standardized cpue estimates were available derived from skippers’ logbooks (Figure 9.4.10.1.1). Comparison with previous assessment and adviceThe information base is similar to previous assessments. The Advice is unchanged in magnitude of the recommended catch. Overall Assessment Results Table 9.4.10.1.1.  | Figure 9.4.10.1.1. Ling in Division IIa. Estimates of Norwegian longline cpue (kg/1000 hooks) based on skippers’ logbooks (pre-2000) and from the entire fleet (2000–2006).  |
 | | Figure 9.4.10.1.2. Ling in Division I&II. Landings by subarea or division. Source: ICES estimates. |
Reference Point Not defined. Scientific Advice Single-stock exploitation boundariesCpue in Areas I and II has been at a reduced level. ICES reiterates the advice to constrain catches to 6000 t and to collect information that can be used to evaluate a long-term sustainable level of exploitation. Management Management Advice Management considerationsThe cpue is used as an indicator of stock trend but it is unclear whether cpue in recent years is adjusted for changes in efficiency of fishing. The landings in 2007 were the highest in the time-series (Table 9.4.10.1.1, Figure 9.4.10.1.1). Biological State and Trend Exploitation rate: Undefined
Abundance level: Undefined Commercial cpue for Norwegian longliners has in recent years been lower than observed in the 1970s and 1980s. There is some evidence of a recent increase (Figure 9.4.10.1.1). Source of information ICES.2009.Report of the ICES Advisory Committee, 2009. ICES Advice, 2009. |
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