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New species in culture?
There is a lot of tasks to be solved when a new species is going into culture - aquaculture!
One whish to manage the whole life cycle! Is you capable of manage the broodstock under the right conditions form to mature and spawn in captivity? Do you have the right feed? Temperature and light - can it be maniopulated to mimicry nature? When eventually succesfull - will you have succes in feeding the fry? Do they feed on artificial feed imediately? Are you forced to culture algae and crusteceans to feed the fry?
And - are the species you find interesting actually a fish for the consumer?
The illustration - above - shows portion-sized Grey Mullets before and after 'pre-cooking-processing'.
Grey Mullets spawn in the marine environment, but lives in the coastal zones with estuaries and often migrates to freshwater rivers and streams. This natural behavior can be used with succes in aquaculture. Brodstock and fry in salty water inhouse, weaning and on-growing to portion size in brakkish water. And if you want them to grow really big (2-6 kilos) they can be reared in sea-cages.
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Fully recirculated inhouse aquaculture facilities is a reality. Properly best known to the general public is the production of salmon smolts, where recirculated tehcnologies isare implemented from incubation through hatchery, weaning and on-growing to the smoltification. Above - a view into the weaning department.
Species like Yellowtailed Kingfish, Tilapia, Mulloway, Bluefinned Tuna, Merluza, Eel, Halibut, Turbot, Sole, Barramundi, Oysters, Sturgeon, Sea Bream, Sea Bass, Cod, Arctic Char, Grouper, Pike-perch, Trout, Prawns, Abalones, Catfish and more are all raised in Danish designed recirculated aquaculture facilities all over the world.
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Danish Recirculation Technology -the future of Aquaculture now!
AquaCircle
is the Danish Industrial Innovation Network dedicated to recirculated aquaculture and technologies involved in this expanding and constantly border-breaking food-producing sector..
Companies in the AquaCircle association are foremost global suppliers of path-breaking
technologies, equipment, management and training for fully recirculated
farming - of fish, crustaceans, bivalves, molluscs, echinoderms and other aquatic organisms.
RAF - in
closed circuits, almost without the nedd of water, bringing you in
control of all parameters, sustainability with build-in traceability,
fullfilling todays and future environmental and customer demands,
securing your returns of investments and the dayly yield.
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Chile is one of the biggest salmon-producing nations in the world. The perspectives are big - and so are the proportions. A new tank for salmon-fry is molded on-site and placed either in-house or outside depending on which life-cycle stade of the salmons is to be nursed. An outdoor placement will often include some kind of sheltering to avoid contamination from the natural environment - for example birds and also to give the possibility to manage the day-lenght with artificial light.
Regardless of the placement all tanks are connected to a water purification unit and the water in the facility is recirculated.
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Water purification
Some times effective solution can be found not necessarily involving 'high-tech' equipment. The picture - above - illustrated how 'low-tech' goes hand in hand wi 'high-tech. Dewatering of the remainings from the water purification systems - sludge or fish-manure - is t he last stage in the recirculation proces. Here this task is done using earthen-worms in a bed of wooden chips. Billions of worms flurish eating the organic compounds in the fish-manure. The effluent is clear water. After a period (years) the wooden chips are replaced and the compost can be used for fertilizing agriculture or horticulture. The shelter/cover of this facility hinder birds in eating the highly valued worms.