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The utilised broodstocks are held in artificial ponds of around 0.11 ha in size, and at low densities. [22] Broodstocks provided higher numbers of larvae and could be spawned readily providing a more definite source of Sydney rock oysters. [22]
Medieval fish pond still in use today at Long Clawson, Leicestershire. Records of the use of fish ponds can be found from the early Middle Ages. "The idealized eighth-century estate of Charlemagne's capitulary de villis was to have artificial fishponds but two hundred years later, facilities for raising fish remained very rare, even on monastic estates.".
Fish farming or pisciculture involves commercial breeding of fish, most often for food, in fish tanks or artificial enclosures such as fish ponds. It is a particular type of aquaculture , which is the controlled cultivation and harvesting of aquatic animals such as fish, crustaceans , molluscs and so on, in natural or pseudo-natural environments.
Taro fish ponds were usually located close to the sea and contained surplus of fish. Fish were also able to directly enter the taro patch-fishponds from the sea through newly created artificial estuary. [5] Fish in these ponds thrived and were able to survive the transition from seawater to freshwater.
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In Europe during medieval times, it was typical for many monastery and castles (small, partly self-sufficient communities) to have fish ponds. These are still common in Europe and in East Asia (notably Japan), where koi may be kept or raised. In Nepal artificial ponds were essential elements of the ancient drinking water supply system.
Aquaculture can be conducted in completely artificial facilities built on land (onshore aquaculture), as in the case of fish tank, ponds, aquaponics or raceways, where the living conditions rely on human control such as water quality (oxygen), feed or temperature.
Subsets of it include (offshore mariculture), fish farms built on littoral waters (inshore mariculture), or in artificial tanks, ponds or raceways which are filled with seawater (onshore mariculture). An example of the latter is the farming of plankton and seaweed, shellfish like shrimp or oysters, and marine finfish, in saltwater ponds
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