Prawn, Northern, prawns

Pandalus borealis

Method of production — Caught at sea
Capture method — Demersal otter trawl
Capture area — North East Atlantic (FAO 27)
Stock area — Northeast Arctic (Barents Sea)
Stock detail — I and II
Certification

Marine Stewardship Council (MSC)


Picture of Prawn, Northern, prawns

Sustainability rating one info

Sustainability overview

The stock is assessed as having full reproductive capacity or healthy, and it is harvested sustainably. Bycatch of juvenile fish is constrained by the mandatory use of sorting grids and temporary closures. The Norwegian NE Arctic cold water prawn fishery is certified as a responsibly managed fishery by the Marine Stewardship Council.

Biology

Pandalus borealis, the northern prawn, or cold-water prawn (also known as pink or deepwater shrimp in North America), are crustaceans belonging to the family Pandalidae. The species has a wide distribution throughout the North Atlantic and North Pacific Oceans (the Pacific form is generally regarded as a subspecies, Pandalus borealiseous). The species occurs as far south as the North Sea, Massachusetts, Oregon and Japan. Northern shrimp are hermaphroditic. They develop initially as males, then become female after around 3 years, and complete their lives as females. Life span is around 5 years, although possibly up to 8 years in northern latitudes. They spawn in autumn and females carry the eggs until April/May, when they hatch and the pelagic larvae are released. Total adult length is about 15 cm. This species inhabits areas of soft, muddy sediment with a depth range from 20-1300 m. Prawns migrate vertically at night to feed on zooplankton. Northern prawn are heavily predated on by fish and marine mammals.

Stock information

Criterion score: 0 info

Stock Area

Northeast Arctic (Barents Sea)

Stock information

The stock is assessed as having full reproductive capacity or healthy, with estimates of stock biomass far above MSY. Throughout the history of the fishery, estimates of stock biomass have remained above MSY Btrigger and fishing mortality below FMSY. ICES advises that when the MSY approach is applied and combined with additional precautionary considerations, catches in 2018 should be no more than 70 000 tonnes. All catches are assumed to be landed.

Management

Criterion score: 0.25 info

There is currently no overall Total Allowable Catch (TAC) set for the fishery. The fishery is partly regulated by effort control, licensing, and a partial TAC (Russian zone only). There is also an obligatory use of sorting grids to avoid bycatch of juvenile cod, haddock, small shrimps and Greenland halibut. To improve the managment of the fishery ICES recommends that an overall TAC is implemented. The Norwegian NE Arctic cold water prawn fishery is certified as a responsibly managed fishery by the Marine Stewardship Council.

Capture Information

Criterion score: 0.25 info

Norwegian and Russian vessels exploit the stock over the entire area. The fleet is 100% small-mesh trawls - the minimum stretched mesh size used is 35 mm. Demersal nets may be towed between 2 boats as in pair-trawling, or one boat may tow more than one net as in twin or multi-rig otter trawling. It is not uncommon for some boats to tow up to 8 or 10 nets. The length of towing is around 4-5 hours, with approximately 10 t of shrimp being taken in 1 tow. Bycatch of juvenille fish is limited by the fitting of mandatory sorting grids in the net and temporary closures of areas where high bycatch of juvenile cod, haddock etc, or of small shrimp less than 15 mm occurs. Total catch in 2013 was 18.7 kt (30 kt in 2011; 21 kt in 2010) where 100% are landings.

References

ICES Advice 2017, http://ices.dk/sites/pub/Publication%20Reports/Advice/2017/2017/pra.27.1-2.pdf;
ICES Advice 2015, Book 3 http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2015/2015/pand-barn.pdf;
http://www.msc.org/track-a-fishery/fisheries-in-the-program/certified/north-east-atlantic/norway_north_east_arctic-cold_water_prawn/fishery-name/;
http://www.ices.dk/sites/pub/Publication%20Reports/Advice/Popular%20advice/pan-barn_popular.pdf