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2. Heʻeia Fishpond - Wikipedia

   en.wikipedia.org/wiki/Heʻeia_Fishpond

   The pond also is home to various species of crab (pāpaʻi), shrimp (ʻōpae), and eel (puhi). [1] When they are small enough, fish enter the fishpond via the sluice gates to feed on phytoplankton and limu. [5] They then remain within it because of the abundance of food and become too large to get back into Kāneʻohe Bay via the sluice gates. [5]

3. Fish pond - Wikipedia

   en.wikipedia.org/wiki/Fish_pond

   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.".

4. Ancient Hawaiian aquaculture - Wikipedia

   en.wikipedia.org/wiki/Ancient_Hawaiian_aquaculture

   Fishes in these ponds were often harvested when spawning fish moved seaward, usually during full moons in the spring. [ citation needed ] Brackish water ponds (loko pu'unone) were seen very close to the ocean and excavated by hand from natural bodies of water that have been stranded by sea-level change, or by creating an earth embankment with ...

5. Water aeration - Wikipedia

   en.wikipedia.org/wiki/Water_aeration

   [2] [10] Fish die-offs have been directly associated with thermal gradients, stagnation, and ice cover. [11] Excessive growth of plankton may limit the recreational use of lakes and the commercial use of lake water. [12] With severe thermal stratification in a lake, the quality of drinking water also can be adversely affected.

6. Pond - Wikipedia

   en.wikipedia.org/wiki/Pond

   The technical distinction between a pond and a lake has not been universally standardized. Limnologists and freshwater biologists have proposed formal definitions for pond, in part to include 'bodies of water where light penetrates to the bottom of the waterbody', 'bodies of water shallow enough for rooted water plants to grow throughout', and 'bodies of water which lack wave action on the ...

7. Raceway (aquaculture) - Wikipedia

   en.wikipedia.org/wiki/Raceway_(aquaculture)

   In a well designed system, the existing water in the raceway is largely replaced by new water when the same volume of new water enters the raceway. Self-cleaning can sometimes be achieved if the fish stocks density is sufficiently high and the water level is sufficiently low. For example, if trout are stocked at 20 kilograms per cubic metre ...