Forms of cultivation

Why aquaculture


Which specie

Problems associated with aquaculture

Cultivating molluscs

Cultivating blue mussels

Cultivation methods

Problems associated with mussel cultivation


Poisonous mussels?


 Different types of cultivation

Extensive and intensive are two seperate forms of cultivation. With extensive cultivation, the fish and other animals and algae grow at their own rate in ponds, lagoons and lakes without supervision or feeding, they grow at their own rate and live on the food that is found naturally in the surrounding waters. Intensive cultivation is more common in the more industrialized areas of the world and demands more equipment and mechanization. The cultivated organisms are fed with products that originate from the agricultural industry and the sea that have been dried and pressed into pellets in a factory. Cultivation takes place in large tanks, siloes, cages or netted areas. Half-intensive cultivation is the most common, where reproduction is controlled and feeding takes place in enclosed areas, but with "natural water" resources. These types of cultivation demand relatively large contributions of manual labour and is more common in the third world.
    It is also necessary to distinguish between monocultural and polycultural cultivation. Monoculture means that only one organism is cultivated, whereas polyculture involves cultivating several organisms simultaneously. Monoculture dominates amongst the intensive forms, whereas polyculture is common amongst the extensive and half intensive forms of cultivation.
    Integrated cultivation is a polyculture or a cultivation that is coordinated in some form with neighbouring agriculture, industry or sewage treatment, or combination of. By coordinating aquaculture with land based activities can certain slag products, nutrients and surplus heat be utilized effectively. The integrated cultivating forms have similarities with processes occurring in the natural ecosystem and therefore contribute in a positive manner to the surroundings.

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Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson