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Nofima Investigates Use of Snow Crabs

20 January 2015

NORWAY - Snow crabs have taken over the Barents Sea. As fishing of the species increases, Nofima investigates the best ways of using these crabs, including shelf life and quality.

“Snow crabs will be the Barents Sea’s biggest resource,” said Senior Scientist Sten Siikavuopio.

Traditionally, this has been one of the most important products from Alaska, but snow crabs can now also be found in Norwegian waters. The market is global and prices are good. This cold-loving crab was first observed in the Barents Sea in 1976, and its numbers have grown quickly. Around 4,000 tonnes of snow crab have been landed in Norway this year.

When boxes of snow crabs arrive at Nofima, the experts are ready for them. The aim of the trials has been to investigate shelf life and quality. Work is also focused on using the leftover raw material from snow crabs to ensure sustainable use of the resource. In addition, the scientists are working with commercial companies on the development of new bait and crab pot technology.

Many of the snow crab’s biological characteristics are still unknown. Little has been documented about its physiology, what it can tolerate and how it lives. In future studies with living crabs, Nofima will also investigate what water temperature they need and how closely together they can live and thrive.

Living crabs

In order to sell snow crabs on the fresh foods market, it will be essential to keep them alive after they are caught. Nofima’s national centre for catch-based aquaculture will now include the snow crab among their species.

“The snow crab is an important species now and will continue to be so in the future. It is therefore natural for us to investigate how we can keep them alive in order to achieve the best possible quality and price,” said the centre’s head Kjell Midling.

If the crabs are to be kept alive, they will also need something good to eat. Nofima has long experience of finding tempting menus for wild crustaceans that are to be kept alive and sold on the fresh foods market far from where they were caught.

Marine enzymes

It is the flesh in the snow crab’s legs that is eaten, but it is certainly possible that the rest of the crab may be of value.

“Because it is a cold water species, it is very interesting to look for marine enzymes and bioactive components that are adapted to the cold. We will investigate this and see how such enzymes might be used commercially,” said Ragnhild Whitaker, who is heading this research.

In previous research projects, Nofima’s scientists have found bioactive components in king crab shells and in prawns that are now used as ingredients in a range of products, including medicines and health foods.

The scientists who are studying snow crabs have long experience of studying other shellfish.

Inspiration from king crab research

Nofima’s scientists are making use of their long experience with king crabs in their new focus on snow crabs. The snow crab is similar in appearance to the king crab, but lives in deeper water, where it thrives in the lower temperatures.

Nofima has been researching the king crab since it first entered our waters. They have investigated everything from the crab’s biology to finished products on the market.

“When we started in 1994, few people believed that the king crab could be kept alive. Now as much as 70 per cent of the king crabs that are caught are kept alive and can be sold on the market at a very different prize to the frozen version. Norwegian king crab has a very good reputation, thanks to the quality it maintains in hotels,” explained Siikavuopio.

The scientists are now looking forward to gaining similar knowledge about snow crabs.

TheFishSite News Desk



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