Forms of aquaculture

Why aquaculture


Which specie

Problems associated with aquaculture


Cultivating blue mussels

Cultivation methods

Problems associated with mussel cultivation


Poisonous mussels?



The cultivation of molluscs

The cultivation of molluscs is an old tradition. After fish, molluscs are the most commonly cultivated Marine organisms in the world. Oysters and blue mussels represent about 90% of the molluscs that are cultivated. Blue mussels dominate in Europe, while the cultivation of oyters dominate in Japan and USA. In South Korea, Taiwan and USA, the cultivation of different thick shelled mussel specie occurs. In Japan large quantities of scallops are cultivated, while in Malaysia cockles are popular. Even pearl oysters are cultivated, but only for the production of pearls.

The blue spots in the distance are large plastic barrels frozen in the ice that are used as floats to hold the mussels in free water as used in the so called long line method.

Trials in the cultivation of blue mussels started in Sweden around 1970. Although the number of Swedish mussel farms has steadily increased in number, the production of mussels is still relatively low compared to many other countries. The largest producer of cultivated blue mussels today is Spain where they are cultivated from rafts. In Sweden, the long line method of cultivation is by far the most common.
    Other large European producers of blue mussels are the Netherlands (bottom cultivation) and France (pole method). On Ireland, about half of the production is the result of bottom cultivation, while the other 50% is prodced on long lines. In Denmark (Limfjord) the method of mussel cultivation resembles fishing for wild mussels. Naturally occurring mussels are scraped up from the bottom, but where bottom falling is controlled so the fishermen know which areas to fish and when. To protect the diversity of specie within the fjord, 40% of its area is exempted from mussel fishing.

Previous page

Page 7 of 18

Next page

Home    Contents   Inspiration    Facts    Collaboration  
© Aquascope 2000   Tjärnö Marine Biological Laboratory, Strömstad, Sweden
Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson