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Aquaculture, also known as aquafarming, is the farming of fish, crustaceans, mollusks, aquatic plants, algae, and other organisms. Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish. Mariculture commonly known as marine farming refers to aquaculture practiced in marine environments and in underwater habitats, opposed to in freshwater.
Tilapia is the common name for nearly a hundred species of cichlid fish from the coelotilapine, coptodonine, heterotilapine, oreochromine, pelmatolapiine and tilapiine tribes, with the economically most important species placed in Coptodonini and Oreochromini. Tilapia are mainly freshwater fish inhabiting shallow streams, ponds, rivers, and lakes, and less commonly found living in brackish water. Historically, they have been of major importance in artisanal fishing in Africa, and they are of increasing importance in aquaculture and aquaponics. Tilapia can become a problematic invasive species in new warm-water habitats such as Australia, whether deliberately or accidentally introduced, but generally not in temperate climates due to their inability to survive in cold water.
Fish farming or pisciculture involves raising fish commercially in tanks or enclosures such as fish ponds, usually for food. It is the principal form of aquaculture, while other methods may fall under mariculture. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. Worldwide, the most important fish species produced in fish farming are carp, tilapia, salmon, and catfish.
WorldFish is an international, nonprofit research organization with headquarters in Penang, Malaysia, and offices in Asia, Africa, and the Pacific. WorldFish’s mission is to harness the potential of fisheries and aquaculture to reduce poverty and hunger in developing countries.
A fishery is the enterprise of raising or harvesting fish and other aquatic life. Commercial fisheries include wild fisheries and fish farms, both in fresh water and the oceans. About 500 million people worldwide are economically dependent on fisheries. 171 million tonnes of fish were produced in 2016, but overfishing is an increasing problem -- causing declines in some populations. Recreational fishing is popular in many locations, particularly North America, Europe, New Zealand, and Australia.
The fishing industry includes any industry or activity concerned with taking, culturing, processing, preserving, storing, transporting, marketing or selling fish or fish products. It is defined by the Food and Agriculture Organization as including recreational, subsistence and commercial fishing, and the harvesting, processing, and marketing sectors. The commercial activity is aimed at the delivery of fish and other seafood products for human consumption or as input factors in other industrial processes. Directly or indirectly, the livelihood of over 500 million people in developing countries depends on fisheries and aquaculture.
Tilapia has become the third most important fish in aquaculture after carp and salmon; worldwide production exceeded 1.5 million metric tons in 2002 and increases annually. Because of their high protein content, large size, rapid growth, and palatability, a number of coptodonine and oreochromine cichlids—specifically, various species of Coptodon, Oreochromis, and Sarotherodon—are the focus of major aquaculture efforts.
Throughout much of the tropics, tilapiine cichlids native to Africa and the Levant have been widely introduced into a variety of aquatic systems. In the U.S. states of Florida and Texas, tilapia were originally introduced to curtail invasive plants. In an effort to meet the growing demand for tilapia, humans have farmed these fish in countries around the world. Capable of establishing themselves into new ponds and waterways, many tilapia have escaped aquaculture facilities across much of Asia, Africa, and South America. In other cases, tilapia have been established into new aquatic habitats via aquarists or ornamental fish farmers.
The Mozambique tilapia is an oreochromine cichlid fish native to southeastern Africa. Dull colored, the Mozambique tilapia often lives up to a decade in its native habitats. It is a popular fish for aquaculture. Due to human introductions, it is now found in many tropical and subtropical habitats around the globe, where it can become an invasive species because of its robust nature. These same features make it a good species for aquaculture because it readily adapts to new situations. It is known as black tilapia in Colombia and as blue kurper in South Africa.
There are two major sources of fish in Uganda; one is from aquaculture, the other from fishing in rivers and lakes. The latter has made up the largest and most significant share of all fishing. Open water covers 15.3 percent of Uganda's surface and comprises five major lakes (Lake Victoria, Lake Albert, Lake Kyoga, Lake Edward and Lake George which are the main sources of fish in the country. Lake Victoria continues to be the most important water body in Uganda both in size and contribution to the total fish catch, followed by Lake Albert and Lake Kyoga.
The fishing industry in the land-locked country of Laos is a major source of sustenance and food security to its people dwelling near rivers, reservoirs and ponds. Apart from wild capture fisheries, which is a major component of fish production, aquaculture and stocking are significant developments in the country. Historically, fishing activity was recorded in writings on the gate and walls of the Wat Xieng Thong in Luang Prabang dated 1560. For many Laotians, freshwater fish are the principal source of protein. The percentage of people involved in regular fishing activity is very small, only near major rivers or reservoirs, as for most of the fishers it is a part-time activity.
China has one-fifth of the world's population and accounts for one-third of the world's reported fish production as well as two-thirds of the world's reported aquaculture production.
Aquaculture in Vanuatu exists on a small scale, both commercially and privately. Several aquacultural efforts have been made in the country, including attempts to raise Pacific oyster, rabbitfish, Malaysian prawn, and tilapia. Experiments with Kappaphycus alvarezii and three species of giant clam were carried out by the Fisheries Department in 1999. The official Fisheries Department records state that $1165 US of cultured coral was exported from the country in 2000, with 275 pieces in total. The cultivation of Macrobrachium lar in taro terraces is practiced for subsistence purposes, and Macrobrachium rosenbergii has been identified by the Vanuatu government as a high-priority species.
China, with one-fifth of the world's population, accounts for two-thirds of the world's reported aquaculture production.
The full relationship between fisheries and climate change is difficult to explore due to the context of each fishery and the many pathways that climate change affects. However, there is strong global evidence for these effects. Rising ocean temperatures and ocean acidification are radically altering marine aquatic ecosystems, while freshwater ecosystems are being impacted by changes in water temperature, water flow, and fish habitat loss. Climate change is modifying fish distribution and the productivity of marine and freshwater species.
Fishery and fishing industry plays a significant part in the national economy of Pakistan. With a coastline of about 814 km, Pakistan has enough fishery resources that remain to be developed. Most of the population of the coastal areas of Sindh and Balochistan depends on fisheries for livelihood. It is also a major source of export earning.
South Africa has an emerging aquaculture. It consists mainly of culture of freshwater species such as crocodiles, trout, catfish, tilapia and ornamental fish as well as marine species such as abalone, prawns, oysters and mussels.
South Korea occupies the southern portion of the Korean peninsula. The total land mass of the country is 98,480 km2 but usable land is only 20% of the total and thus the population is concentrated around the coast. The Korean Peninsula is surrounded by the East, West and South Seas, a coast-line that extends for about 2,413 km. Endowed with an abundance of fisheries resources, Koreans have developed a distinct seafood culture with annual per capita sea food consumption of 48.1 kg in 2005.
Aquaculture Research and Development Centre, Kajjansi (ARDC), is a national centre responsible for aquaculture research and development in Uganda. It is a branch of the National Fisheries Resources Institute (NAFIRRI).
Tilapia tilapinevirus, or Tilapia lake virus (TiLV), is a negative-strand RNA virus that infects both wild and aquacultured populations of tilapia. It is the only species in the monotypic genus Tilapinevirus, which in turn is the only genus in the family Amnoonviridae. Thus far it has been recorded in various regions across Asia, Africa, and South America. The virus was first discovered and identified in 2014 when the Sea of Galilee in Israel experienced a major noticeable decline in tilapia catch quantities.
References
- ↑ "Fishery Country Profile: Samoa". Food and Agriculture Organization. April 2002. Retrieved 2009-05-02.
- ↑ "Increasing Rural Incomes: An Evaluation of Three Rural Sector Projects in Samoa" (PDF). Quality Assurance Series. Australia: AusAID (19): 21. July 2000. Archived from the original (PDF) on 2009-06-13.
- ↑ "Samoa National Aquaculture Workshop" (PDF). SPC Fisheries Newsletter (111): 13. October–December 2004.