There are 3 Norwegian prawn populations: one in the Barents Sea, one in the North Sea and Skagerrak and one in the fjords. Prawns thrive in deep cold waters, but are found nearer the surface at night where they feed on animal plankton. The prawn is hermaphroditic – it starts life as a male and completes life as a female.
The age of the sex change and spawning time are different for the 3 populations. The prawns in the Barents Sea complete the change at the age of 4-7 years and spawn from June-October. In the North Sea and Skagerrak, prawns change sex between 2-6 years of age and spawn in June-November, and the prawns in the Norwegian fjords, finally, go through the change between 1,5 and 2,5 years and spawn in October-November.
The female prawn carries the roe under her abdomen and seeks out shallow waters where the larvae hatch. The larvae then float close to the surface to feed on plankton. Prawns live up to a maximum of 10 years.
Prawns are caught with trawl all year around.
- Fresh or frozen shell-on prawns
- Cooked and peeled prawns in brine
- Cooked or raw peeled prawns, frozen or in MAP
Prawns in the Barents Sea: Organic matter, carrion, small crustaceans and worms
Prawns in the North Sea and Skagerrak: Plankton, small benthic, dead plant and animal remains
Coastal and fjord prawns: Organic matter, carrion, small crustaceans and worms
Prawns are especially rich in:
- Protein that builds and maintains every cell in the body.
- Vitamin D, necessary to balance calcium in the body, which maintains and strengthens the bones.
- Vitamin B12, which is important for the body in producing new cells, including red blood cells. Vitamin B12 can help to prevent anaemia.
- Selenium, an important element in an enzyme that fights harmful chemical processes in the body.
More nutritional data can be found at www.nifes.no/en/prosjekt/seafood-data