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| Marine Resource Fact Sheet |
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| Shrimp - Barents Sea and Svalbard Area |
 | Northern shrimp (Pandalus borealis) in Subareas I and II (Barents Sea) |
| | 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 - Northern prawn, fr - Crevette nordique, es - Camarón norteño, ru - Креветка северная |
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| Geographic extent of Shrimp - Barents Sea and Svalbard Area
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| FAO Fishing Statistical Division Areas |
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| 27.2.b | Spitzbergen and Bear Island (Division 27.2.b) |
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| FAO Fishing Statistical Sub Areas |
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| 27.1 | Barents Sea (Subarea 27.1) |
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| Main Descriptors | Considered a single stock: Yes
Spatial Scale: Sub-Regional
Management unit: Yes
Reference year: 2012
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| 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 Reference Year is the last year considered in the stock assessment and/or fishery status. |
| | | | | | Biological State and Trend  | | Figure 3.4.9.1 |
The assessment is considered indicative of stock trends, and provides relative measures of stock status rather than absolute. Throughout the history of the fishery, estimates of stock biomass have been above B trigger and fishing mortality below F MSY. The estimated risk of falling below B trigger and B lim or of exceeding F MSY by the end of 2012 is less than 1%. Recruitment indices showed no major changes in the period 2004–2012. Habitat and Biology Depth zone: Shelf (50 m - 200 m). Vertical distribution: Demersal/Benthic. Northern shrimp are hermaphroditic. Individuals start out as males, but after 3–4 years they change sex and complete their lives as females. Various fish and marine mammal species prey on Northern shrimp, and predation is considered important in influencing Northern shrimp stock dynamics. Geographical Distribution Jurisdictional distribution: Shared between nations Water Area Overview Spatial Scale: Sub-Regional
Ecoregion: Barents Sea.
Geo References  | | Geographic extent of Shrimp - Barents Sea and Svalbard Area
| FAO Fishing Statistical Division Areas | 27.2.b: Spitzbergen and Bear Island (Division 27.2.b) | | FAO Fishing Statistical Sub Areas | 27.1: Barents Sea (Subarea 27.1) |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Shrimp - Barents Sea and Svalbard Area | FAO Major Fishing Areas | 27:
Atlantic, Northeast | | Large Marine Ecosystem Areas (LME) | 20: Barents Sea | | 21: Norwegian Shelf | | 58: Kara Sea | | 59: East Greenland Shelf/Sea | | 64: Arctic Ocean |
Resource Structure Considered a single stock: Yes Exploitation The fisheriesNorwegian and Russian vessels exploit the stock over the entire resource area, while vessels from other nations are restricted to the Svalbard fishery zone. No overall TAC has been established for this stock, and the fishery is partly regulated by effort control, licensing, and a partial TAC (Russian zone only). Bycatch is constrained by mandatory sorting grids and by temporary closures of areas where high bycatch occurs of juvenile cod, haddock, Greenland halibut, redfish, or small shrimp (<15 mm). The minimum mesh size is 35 mm.
| Catch by fleet |
Total catch (2011) = 29.790 kt, where 100% are landings (100% trawl). |
Effects of the fisheries on the ecosystemSmall-mesh trawls are used to catch Northern shrimp, frequently with a bycatch of juvenile fish. However, overall bycatch is considered to be relatively small due to the use of mandatory sorting grids and temporary closures of areas where high bycatch occurs. Assessment Scientific Advice ICES advises that catches of 60 000 tonnes in 2013 will maintain the stock at the current high biomass. Overall Assessment Results  | Figure 3.4.9.1 Northern shrimp in Subareas I and II (Barents Sea). Summary of stock assessment. Catches 2012 projected to the end of the year. Recruitment index: abundance of Northern shrimp at size 13–16 mm CL from Norwegian (2004–2008) and Russian (2006–2012) surveys. Below: Median estimates of the relative biomass (B/BMSY) and fishing mortality (F/FMSY): Grey boxes are inter-quartile ranges; the arms of each box are the 95% credibility interval of the distribution. Top right: Fishable biomass and F over the years.  |
Assessment Model Quality considerationThe assessment model best describes trends in stock development and is not fully sensitive to year-to-year changes. Large and rapid changes in recruitment may therefore not be fully captured in model predictions. If predation on Northern shrimp were to increase rapidly outside the range in the modelled period (1970–2012), the stock size might change more than the modelling results indicate. Scientific basis
| Assessment type |
Bayesian version of a surplus-production model. |
| Input data |
Three survey indices (the Norwegian shrimp survey 1982–2004, the Russian shrimp survey 1984–2005, and the Norwegian–Russian ecosystem survey Eco-Norw-Q3 since 2004); one commercial index (standardized cpue since 1970). |
| Discards and bycatch |
Not included in the assessment. |
| Indicators |
None. |
| Other information |
Bayesian stock–production model introduced in 2006. |
| Working group report |
NIPAG |
Management Management unit: Yes Management plansNo specific management objectives are known to ICES. 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. Northern shrimp (Pandalus borealis) in Subareas I and II (Barents Sea). Report of the ICES Advisory Committee, 2012. ICES Advice, November 2012.  http://www.ices.dk/committe/acom/comwork/report/2012/2012/pand-barn.pdf |
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