Aquaculture is the farming of fish and other aquatic life in enclosures, such as ponds, lakes and tanks, or cages in rivers and coastal waters. China's 2005 reported harvest was 32.4 million tonnes, more than 10 times that of the second-ranked nation, India, which reported 2.8 million tonnes.[2]
China's 2005 reported catch of wild fish, caught in rivers, lakes, and the sea, was 17.1 million tonnes. This means that aquaculture accounts for nearly two-thirds of China's reported total output.
The principal aquaculture-producing regions are close to urban markets in the middle and lower Yangtze Valley and the Zhu Jiang Delta.
Early history
Aquaculture began about 3500 BC in China with the farming of the common carp.[4][5] These carp were grown in ponds on silk farms, and were fed silkworm nymphs and faeces.[4] Carp are native to China. They are good to eat, and they are easy to farm since they are prolific breeders, do not eat their young, and grow fast. The original idea that carp could be cultured most likely arose when they were washed into ponds and paddy fields during monsoons. This would lead naturally to the idea of stocking ponds.[6]
In 475 BC, the Chinese politician Fan Li wrote the earliest known treatise on fish farming,[4][7]Yang Yu Ching (Treatise on fish breeding). The original document is in the British Museum.
The common carp was the number one fish of aquaculture in antiquity, and today is still extensively cultured worldwide.
During the Tang dynasty (618–907 AD), the farming of common carp was banned because the Chinese word for common carp (鯉) sounded like the emperor's family name, Li (李). Anything that sounded like the emperor's name could not be kept or killed.[8] The ban had a productive outcome, because it resulted in the development of polyculture, growing multiple species in the same ponds. Different species feed on different foods and occupy different niches in the ponds. In this way, the Chinese were able to simultaneously breed four different species of carp, the mud carp, which are bottom feeders, silver carp and bighead carp, which are midwater feeders, and grass carp which are top feeders.[4][9] Another development during the Tang dynasty was a fortunate genetic mutation of the domesticated carp, which led to the development of goldfish.
From 1500 AD, methods of collecting carp fry from rivers and then rearing them in ponds were developed."[6]
In the past, fish culture in China has been a family business, with traditional techniques passed from generation to generation.[12] However, in the late 1960s the Chinese government began a move to the modern induced breeding technologies, which has resulted in a rapid expansion of freshwater aquaculture in China.[12][13]
From 1978, China's economic policies moved from central planning towards a market economy, opening new markets for aquaculture products. The effect of this, together with further technological advances, has been to move Chinese aquaculture towards industrial scale levels of production.[12] In the 1980s, many species other than carp, such as other species of fish, crustaceans, molluscs and seaweeds, were brought into production. Shrimp aquaculture significantly increased as a result of both state economic incentivizes (including tax breaks on imported fertilizer and equipment) as well as a global shrimp shortage following a 1987 virus that devastated shrimp farms in Taiwan.[14]:171-172
Overproduction of shrimp increased vulnerability of the shrimp aquaculture population to viruses, and in the Great Shrimp Disaster of 1993, the white spot virus wiped out almost all of China's black tiger shrimp aquaculture industry.[14]:172 By the early 2000s, shrimp aquaculture recovered thanks to a species switch to Pacific white shrimp.[14]:172
In the late 1990s, CAFS scientists developed a new variant of the common carp called the Jian carp. This succulent fish grows rapidly and has a high feed conversion rate. Over 50% of the total aquaculture production of carp in China has now converted to Jian carp.[11][15] By 2004, the induced breeding of carp had been so effective that the carp industry amounted to 46 percent of the total aquaculture output.[12]
Since 2002, China has been the world largest exporter of fish and fish products. In 2005, exports, including aquatic plants, were valued at US$7.7 billion, with Japan, the United States and the Republic of Korea as the main markets. In 2005, China was sixth largest importer of fish and fish products in the world, with imports totalling US$4.0 billion.[2]
In 2003, the global per capita consumption of fish was estimated at 16.5kg, with Chinese consumption, based on her reported returns, at 25.8kg.[2]
The common carp is still the number one fish of aquaculture. The annual tonnage of common carp, not to mention the other cyprinids, produced in China exceeds the weight of all other fish, such as trout and salmon, produced by aquaculture worldwide.
Since the 1970s, the reform policies have resulted considerable development of China's aquaculture, both marine and inland. The total used for aquaculture went from 2.86 million hectares in 1979 to 5.68 million hectares in 1996. Over the same time span, production increased from 1.23 million tonnes to 15.31 million tonnes.[16]
In 2005, worldwide aquaculture production including aquatic plants was worth US$78.4 billion. Of this, the Chinese production was worth US$39.8 billion. In the same year there were about 12 million fish farmers worldwide. Of these, China reported 4.5 million employed full-time in aquaculture.[2]
In 1979, inland aquaculture occupied 237.8 million hectares and produced 813,000 tonnes. In 1996, they occupied 485.8 million hectares and produced 10.938 million tonnes. In that year, 17 provinces produced 100,000 tonnes from inland aquaculture.[16]
Nitrogen cycling in China's aquaculture ecosystem. The unit is Tg N yr−1. The red lines represent Nr flow. The numbers in front of the parentheses represent the Nr flux in 2015; the numbers in parentheses represent the Nr flux in 1978.
Pond culture is the most common method of inland aquaculture (73.9% in 1996). These ponds are mostly found around the Pearl River basin and along the Yangtze River. They cover seven provinces: Anhui, Guangdong, Hubei, Hunan, Jiangsu, Jiangxi and Shandong. The government has also supported developments in rural areas to get rid of poverty. The sector is significant from a nutrition point of view, because it brings seafood to areas inland away from the sea where consumption of seafood has traditionally been low.[16] Even the arid Xinjiang produced 58,835 tons of fish in 2000, 85% of it from aquaculture.[19]
In recent times, China has extended its skills in culturing pond system to open waters such as lakes, rivers, reservoirs and channels, by incorporating cages, nets and pens.[16]
Fish farming in paddy fields is also developing. In 1996, paddy fish farming occupied 12.05 million hectares producing 376,800 tonnes. A further 16 million hectares of paddy fields are available for development.[16]
Species introduced from other parts of the world are also being farmed, such as rainbow trout, tilapia, paddle fish, toad catfish, silver salmon, river perch, roach and Collossoma brachypomum.[16]
Besides fish and crustaceans, turtles (primarily, the Chinese soft-shelled turtlePelodiscus sinensis) have been extensively farmed as well since the 1980s and 1990s. Based on a 2002 survey of 684 turtle farms, researchers estimated that these farms had the total herd of more than 300 million animals; they sold over 128 million turtles each year, with the total weight of about 93,000 tons, worth around US$750 million. Since these data are based on less than half of all turtle farms registered with the appropriate regulating agencies (i.e., 684 out of 1,499), it was estimated that the overall herds and production amounts are at least twice as high.[20]
Since 1990s, research and experimentation have been conducted in China for remediation and utilization of alkali land via combined agriculture and aquaculture practices, with considerable success and experiences. [21][22][23] Aquaculture technology of utilizing inland saline-alkali water for seafood production is becoming mature, covering wide-range of seafood species including shrimps, crabs, shellfish and fish such as sea bass and grouper.[24][25]
Using current culture technologies, much farmed cultivation of marine plants and animals can be applied within the 10 metre isobath in marine environments. There are about 1.33 million hectares of marine cultivable areas in China, including shallow seas, mudflats and bays. Before 1980, less than nine percent of these areas were cultivated, and species were mainly confined to kelp, laver (Porphyra) and mussels.[16]
Between 1989 and 1996, areas of cultivated shallow sea were increased from 25,200 to 114,200 hectares, areas of mudflat from 266,800 to 533,100 hectares, and areas of bay from 131,300 to 174,800 hectares. The 1979 production was 415,900 tonnes on 117,000 hectares, and the 1996 production was 4.38 million tonnes on 822,000 hectares.[16]
In 1989, production of farmed shrimp was 186,000 tonnes, and China was the largest producer in the world. In 1993 viral disease struck, and by 1996 production declined to 89,000 tonnes. This was attributed to inadequate management such as overfeeding and high stock densities.[16]
In 2001, the fisheries scientists Reg Watson and Daniel Pauly expressed concerns in a letter to Nature that China was over-reporting its catch from wild fisheries in the 1990s.[26][27] They said that made it appear that the global catch since 1988 was increasing annually by 300,000 tonnes, whereas it was really shrinking annually by 350,000 tonnes. Watson and Pauly suggested this may have been related to Chinese policies where state entities that monitored the economy were also tasked with increasing output. Also, until more recently, the promotion of Chinese officials was based on production increases from their own areas.[28][29]
China disputed this claim. The official Xinhua News Agency quoted Yang Jian, director general of the Agriculture Ministry's Bureau of Fisheries, as saying that China's figures were "basically correct".[30] However, the FAO accepted there were issues with the reliability of China's statistical returns, and for a period treated data from China, including the aquaculture data, apart from the rest of the world.[31][32]
Aquaculture, also known as aquafarming, is the controlled cultivation ("farming") of aquatic organisms such as fish, crustaceans, mollusks, algae and other organisms of value such as aquatic plants. Aquaculture involves cultivating freshwater, brackish water and saltwater populations under controlled or semi-natural conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish. Aquaculture is also a practice used for restoring and rehabilitating marine and freshwater ecosystems. Mariculture, commonly known as marine farming, is aquaculture in seawater habitats and lagoons, as opposed to freshwater aquaculture. Pisciculture is a type of aquaculture that consists of fish farming to obtain fish products as food.
The term carp is a generic common name for numerous species of freshwater fish from the family Cyprinidae, a very large clade of ray-finned fish mostly native to Eurasia. While carp are prized quarries and are valued as both food and ornamental fish in many parts of the Old World, they are generally considered useless trash fish and invasive pests in many parts of Africa, Australia and most of the United States.
The Eurasian carp or European carp, widely known as the common carp, is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia. The native wild populations are considered vulnerable to extinction by the International Union for Conservation of Nature (IUCN), but the species has also been domesticated and introduced into environments worldwide, and is often considered a destructive invasive species, being included in the list of the world's 100 worst invasive species. It gives its name to the carp family, Cyprinidae.
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. 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, catfish, salmon and tilapia.
Fishery can mean either the enterprise of raising or harvesting fish and other aquatic life or, more commonly, the site where such enterprise takes place. Commercial fisheries include wild fisheries and fish farms, both in freshwater waterbodies 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.
The Indian prawn is one of the major commercial prawn species of the world. It is found in the Indo-West Pacific from eastern and south-eastern Africa, through India, Malaysia and Indonesia to southern China and northern Australia. Adult shrimp grow to a length of about 22 cm (9 in) and live on the seabed to depths of about 90 m (300 ft). The early developmental stages take place in the sea before the larvae move into estuaries. They return to the sea as sub-adults.
A fish pond or fishpond is a controlled pond, small artificial lake or retention basin that is stocked with fish and is used in aquaculture for fish farming, for recreational fishing, or for ornamental purposes.
Agriculture and aquaculture in Hong Kong are considered sunset industries. Most agricultural produce is directly imported from the neighbouring mainland China. In 2006 the industry accounts for less than 0.3% of the labour sector. Geographically Hong Kong consists largely of steep, unproductive hillside. The local aquaculture industry is also facing challenges from competition with imported aquatic food products and concern of fish and seafood safety.
Marine shrimp farming is an aquaculture business for the cultivation of marine shrimp or prawns for human consumption. Although traditional shrimp farming has been carried out in Asia for centuries, large-scale commercial shrimp farming began in the 1970s, and production grew steeply, particularly to match the market demands of the United States, Japan and Western Europe. The total global production of farmed shrimp reached more than 1.6 million tonnes in 2003, representing a value of nearly 9 billion U.S. dollars. About 75% of farmed shrimp is produced in Asia, in particular in China and Thailand. The other 25% is produced mainly in Latin America, where Brazil, Ecuador, and Mexico are the largest producers. The largest exporting nation is India.
Fishing in India is a major sector within the economy of India contributing 1.07% of its total GDP. The fishing sector in India supports the livelihood of over 28 million people in the country, especially within the marginalized and vulnerable communities. India is the third largest fish producing country in the world accounting for 7.96% of the global production and second largest producer of fish through aquaculture, after China. The total fish production during the FY 2020-21 is estimated at 14.73 million metric tonnes. According to the National Fisheries Development Board the Fisheries Industry generates an export earnings of Rs 334.41 billion. Centrally sponsored schemes will increase exports by Rs 1 lakh crore in FY25. 65,000 fishermen have been trained under these schemes from 2017 to 2020. Freshwater fishing consists of 55% of total fish production.
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. It is also a major importer of seafood and the country's seafood market is estimated to grow to a market size worth US$53.5 Billion by 2027.
As with other countries, the 200 nautical miles (370 km) exclusive economic zone (EEZ) off the coast of the United States gives its fishing industry special fishing rights. It covers 11.4 million square kilometres, which is the second largest zone in the world, exceeding the land area of the United States.
The coastline of the Russian Federation is the fourth longest in the world after the coastlines of Canada, Greenland, and Indonesia. The Russian fishing industry has an exclusive economic zone (EEZ) of 7.6 million km2 including access to twelve seas in three oceans, together with the landlocked Caspian Sea and more than two million rivers.
Indonesia ranks as the fourth most productive country in the world measured in terms of gross yearly aquaculture production with an estimated 14.4 million tons in 2014. It benefits from being an archipelago nation with an extensive coastline over 81,000 km long, situated in a tropical climate. The top aquaculture products exported include shrimp, fish and seaweed.
The mrigal carp, also known as the white carp, is a species of ray-finned fish in the carp family. Native to streams and rivers in India, the only surviving wild population is in the Cauvery River, leading to its IUCN rating as vulnerable. It is widely aquafarmed and introduced populations exist outside its native range. It reaches a maximum length of 1 m (3.3 ft). This species and Cirrhinus mrigala are considered distinct.
Fishery and fishing industry plays a significant part in the national economy of Pakistan. With a coastline of about 1,120 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 Korea is a major center of aquaculture production, and the world's third largest producer of farmed algae as of 2020.
A shrimp is a crustacean with an elongated body and a primarily swimming mode of locomotion – typically belonging to the Caridea or Dendrobranchiata of the decapod order, although some crustaceans outside of this order are also referred to as "shrimp".
The fishing industry in Thailand, in accordance with usage by The World Bank, the UN's Food and Agriculture Organization (FAO) and other multinational bodies, refers to and encompasses recreational fishing, aquaculture, and wild fisheries both onshore and offshore.
↑ Ruǎn Jīnshān; Li Xiùzhū; Lín Kèbīng; Luō Dōnglián; Zhōu Chén; Cài Qīnghǎi (阮金山;李秀珠;林克冰;罗冬莲;周宸;蔡清海), 安海湾南岸滩涂养殖贝类死亡原因调查分析 (Analysis of the causes of death of farmed shellfish on the mudflats in the southern part of Anhai Bay), 《福建水产》 (Fujian Aquaculture), 2005-04
↑ Jian, Zhu; Jianxin, Wang; Yongsheng, Gong and Jiaxin, Chen (2005) "Carp Genetic Resources of China" pp. 26–38. In: David J Penman, Modadugu V Gupta and Madan M Dey (Eds.) Carp genetic resources for aquaculture in Asia, WorldFish Center, Technical report: 65(1727). ISBN978-983-2346-35-7.
↑ SLuo, Z., Hu, S. and Chen, D. (2018) "The trends of aquacultural nitrogen budget and its environmental implications in China". Nature: Science Reports, 8 (10877). doi:10.1038/s41598-018-29214-y
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