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| How to Grow Plants with Hydroculture |
Though many people think that hydroculture is just used to grow illegal substances indoors, this misconception is false. Hydroculture is an easy way to grow and maintain a wide variety of house plants, fruits and vegitables.
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Aquaculture is the cultivation of the natural produce of water (such as fish or shellfish, algae and other aquatic organisms). Mariculture is specifically marine aquaculture, and thus is a subset of aquaculture. Some examples of aquaculture include raising catfish and tilapia in freshwater ponds, growing cultured pearls, and farming salmon in net-pens set out in a bay. Fish farming is a common type.
The practice of aquaculture is very ancient and found in many cultures. Aquaculture was used in China circa 2500 BC. When the waters lowered after river floods, some fishes, namely carps, were held in artificial lakes. Their brood were later fed using nymphs and feces from silkworms used for silk production. The Hawaiian people practiced aquaculture by constructing fish ponds (see Hawaiian aquaculture). A remarkable example from ancient Hawaii is the construction of a fish pond, dating from at least 1,000 years ago, at Alekoko. According to legend, it was constructed by the mythical Menehune. The Romans were quite adept in breeding fish in ponds. In Europe it became common again in monasteries during the Middle Ages, since fish was scarce and thus expensive. Transportation improvements in the 19th century made fish easily available and inexpensive, even far from the seas, causing a decline in aquaculture. The current boom in aquaculture started in the 1960s as prices for fish began to climb. Wild fish capture was reaching its peak and the human population was continuing to rise. Today, commercial aquaculture exists on a unprecedented, huge scale. In the 1980s open-netcage salmon farming was also expanding; this particular type of aquaculture technology is still a minor part of the production of farmed finfish worldwide, but evidence of its negative impact on wild stocks, which started coming to light in the late 1990s, has caused it to be a major cause of controversy. |
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