Search results
Results From The WOW.Com Content Network
According to the FAO, "...a fishery is an activity leading to harvesting of fish.It may involve capture of wild fish or raising of fish through aquaculture." It is typically defined in terms of the "people involved, species or type of fish, area of water or seabed, method of fishing, class of boats, purpose of the activities or a combination of the foregoing features".
Aquaculture, in the United States, includes the farming of hatchery fish and shellfish which are grown to market size in ponds, tanks, cages, or raceways, and released into the wild. Aquaculture is also used to support commercial and recreational marine fisheries by enhancing or rebuilding wild stock populations.
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.
The aquaculture or farming of piscivorous fish, like salmon, does not help the problem because they need to eat products from other fish, such as fish meal and fish oil. Studies have shown that salmon farming has major negative impacts on wild salmon, as well as the forage fish that need to be caught to feed them.
Fish are harvested by commercial fishing and aquaculture. Stocks fished within biologically sustainable levels decreased from 90% in 1974 to 62.3% in 2021. [5] The world harvest increased over the 20th century and, by 1986, had stabilized around 85–95 million metric tons (94 × 10 ^ 6 –105 × 10 ^ 6 short tons) per year. [9]
Aquaculture is fish or shellfish farming. [21] The aquaculture fisheries hatch and raise the fish until market size. [21] By using aquaculture the wild fish will be able to repopulate without the threat of overfishing. The aquaculture fish have a variety of uses including: food, nutritional, and pharmaceutical. [21] Two types of aquaculture exist.
It may involve capture of wild fish or raising of fish through aquaculture. A fishery is characterised by the species caught, the fishing gear used, and the area of operation. Fishing effort – a measure of how much work is needed by fishermen to catch fish. Different measures are appropriate for different kinds of fisheries.
In 2008 aquaculture accounted for 46% of total food fish supply, around 115 million tonnes. [2] Although wild caught juveniles are still utilised in the industry, concerns over sustainability of extracting juveniles, and the variable timing and magnitude of natural spawning events, make hatchery production an attractive alternative to support ...