Fisheries & Aquaculture

Circumstantial archaeological evidence from Jiahu has been proposed as possibly the earliest aquaculture site, dating from about 8,200 years before present. The interpretation remains speculative. It is linked to the trapping of carp in lakes left behind as river floodwaters subsided.

Evidence indicates the Gunditjmara people of south-western Victoria developed some 100 square kilometres of volcanic floodplain into a complex of channels and dams, using woven traps to capture and preserve short-finned eels year-round. The Budj Bim Cultural Landscape is now a World Heritage Site and one of the oldest known aquaculture sites. Anthropologist Peter Sutton has disputed the classification, noting no evidence of breeding, feeding or rearing.

Chinese tradition places carp culture as far back as the third millennium BCE, making it among the earliest claimed instances of deliberate fish farming. Early aquaculturists reportedly fed their stock on nymphs and silkworm faeces. Documentary confirmation only arrives much later.

Evidence suggests Egyptian fish farming around 3,500 years before present, centred on Lake Bardawil. The fish were reportedly traded into Canaan, implying production beyond subsistence levels. This is among the earliest claimed instances of aquaculture outside China.

Fan Li's treatise constitutes the earliest significant literary evidence for aquaculture in China. It marks the point at which fish culture moved from tradition into codified technical knowledge. The text underpins claims that China is the birthplace of systematic pisciculture.

This ancient manual shows that carp farming in China had become more sophisticated within a generation of Fan Li's monograph. It documents the accumulation of husbandry technique rather than mere opportunistic trapping.

Roman practice established pond-based pisciculture and coastal oyster cultivation before 100 CE. These techniques formed the technical foundation later inherited by European monastic aquaculture. Roman lagoon farming is an early example of what would now be called inshore mariculture.

Monastic fishponds spread aquaculture inland, where populations otherwise depended on salted fish. Demand was reinforced by roughly 150 fasting and abstinence days per year on which meat was prohibited. The 15th-century fishponds of the Trebon Basin in the present-day Czech Republic survive as a tentative UNESCO World Heritage Site.

The German experimenter published an article on the artificial production of trout and salmon summarising his findings. He earned a reputation as the founder of artificial fish-rearing. His work established the hatchery principle on which modern finfish aquaculture rests.

By the latter decades of the eighteenth century oyster cultivation had been established in estuaries along the Atlantic seaboard of North America. This marked the transfer of European shellfish culture to the New World. It laid the basis for a commercial shellfish industry.

The term appeared in an 1855 newspaper article, initially in reference to the harvesting of ice, and later to sub-irrigation in terrestrial agriculture. The Oxford English Dictionary records the modern usage of 'aquaculture' from 1887 and 'aquiculture' from 1867. The word was applied to hatchery experiments with cod and lobster in 1890.

Ainsworth's trials opened a sequence of American hatchery experimentation in the mid-nineteenth century. They preceded the first commercial operations in New York State. The work helped establish North American freshwater hatchery capability.

Green's venture turned artificial fish rearing into a commercial proposition in the United States. It was among the first hatcheries operated as a business rather than an experiment. It marks the beginning of hatchery infrastructure as an industry.

With Fletcher of Concord, Massachusetts involved, hatcheries were running on both sides of the North American border. This represented the spread of hatchery capability from isolated experiment to multi-national practice. It established North America as an early centre of artificial propagation.

The Newfoundland facility set a new benchmark for scale and technical sophistication in artificial fish propagation. Its hatchery experiments with cod and lobster were described using the word 'aquaculture' in 1890. It demonstrated the industrialisation of hatchery infrastructure.

Around 1900 Californian operators began harvesting wild kelp and trying to manage the resource. The seaweed was subsequently labelled a wartime strategic resource. This represents an early attempt at managed marine plant supply short of full cultivation.

Founded in the 1870s, the company had by the 1920s established itself at the forefront of American trout production. Its commercial scale showed that hatchery-based finfish farming could be sustained as a business. It later pioneered advances in spawning control.

Gim cultivation is the oldest form of aquaculture in Korea, originally using bamboo or oak sticks, with nets replacing them in the nineteenth century. Floating rafts introduced in the 1920s enabled production at mass scale. The technique underpins Korea's seaweed industry.

By controlling photoperiod, the company induced fish to spawn artificially at any time of year. This broke the seasonal constraint on hatchery output and allowed continuous production. Photoperiod control remains a foundational technique in modern aquaculture.

Abalone culture was established in Japan and China in the late 1950s and early 1960s. The industry became increasingly successful from the mid-1990s onwards. It is among the higher-value shellfish aquaculture sectors.

Commercial shrimp farming started in the 1970s and production grew steeply thereafter, reaching more than 1.6 million tonnes worth about US$9 billion by 2003. The expansion drove large-scale conversion of coastal land, including 269,000 hectares of Indonesian mangroves over four decades. About 20 per cent of mangrove forests have been destroyed since 1980, partly due to shrimp farming.

Farmed aquatic animals accounted for 53 per cent of global aquatic animal output and over 59 per cent of aquatic animal food for human consumption. Production was concentrated in Asia, at around 89 per cent of the global total, followed by Latin America and the Caribbean at 3 per cent. Europe and Africa each contributed 2 per cent.

Two trial mussel farms were sited within an offshore wind installation. The project tested co-location of aquaculture with marine renewable energy infrastructure. It pointed towards multi-use of offshore space.

Mass mortality episodes struck salmon farmers along Chile's coast and affected the wider ecology. The events highlighted the environmental vulnerability of concentrated marine cage farming. They added to scrutiny of salmon aquaculture's ecological footprint.

Aquaculture's contribution to combined capture and aquaculture production reached 46.8 per cent, up from 25.7 per cent in 2000. Aquaculture production including aquatic plants was 110.2 million tonnes with a first-sale value of US$244 billion. Growth averaged 5.8 per cent a year over 2001–2016, faster than other food sectors but below 1980s and 1990s rates.

For the first time farmed production exceeded capture fisheries in supplying fish for human consumption. Capture fishery output had been relatively static since the late 1980s, leaving aquaculture responsible for all continuing growth. The crossover marked a structural shift in how the world obtains aquatic protein.

Following trials in 2012, the ranch was built on an artificial reef of 5,000 concrete units called abitats, each 900 kg and able to host 400 abalone. It represents a hybrid between ranching and reef construction. The model extends aquaculture infrastructure into open coastal waters.

The policies aimed to meet growing demand for healthy seafood, create jobs in coastal communities and restore ecosystems. Large facilities discharging wastewater require permits under the Clean Water Act, and those producing at least 100,000 pounds a year face specific national discharge standards. The framework defined the US regulatory regime for aquaculture.

The achievement closed the life cycle of a high-value species previously dependent on wild-caught juveniles for ranching. It demonstrated that even large pelagic predators could be propagated in onshore facilities. It extended the range of species amenable to full-cycle aquaculture.

The ASC was created to manage global standards and certification programmes for farmed seafood. It institutionalised the standards developed through the Aquaculture Dialogues. Certification became a key instrument governing aquaculture practice worldwide.

The IMO prohibition removed the principal antifouling agents used on submerged structures. This created a need for environmentally friendly but still effective antifouling compounds for aquaculture equipment. It remains an unresolved technical constraint on cage and net infrastructure.

The dialogues aimed to develop measurable, performance-based standards for responsibly farmed seafood. They brought producers, buyers and environmental groups into a common standard-setting process. The work led directly to a permanent certification body.

The two scientists argued that Chinese over-reporting during the 1990s made the global catch appear to be rising by 300,000 tonnes a year when it was in fact shrinking by 350,000 tonnes. The finding cast doubt on the reliability of global fisheries statistics. It reframed understanding of how far aquaculture, rather than capture, was sustaining supply.

Ecological problems, repeated disease outbreaks and pressure from NGOs and consumer countries drove changes in the shrimp industry and stronger regulation in the late 1990s. The 1999 initiative sought to develop and promote sustainable aquaculture practice. It marked the emergence of market-based governance of aquaculture.

Improvements in methods and commercial feeds reduced the wild fish input required per kilogram of farmed salmon. By 2012, 34 per cent of fish oil and 28 per cent of fishmeal came from processing residues. Plant and insect-based feeds are being developed to reduce reliance on wild fish further.

Output grew from 13.5 million tonnes in 1995 to just over 30 million tonnes in 2016. By 2016 aquaculture supplied 96.5 per cent by volume of the 31.2 million tonnes of wild-collected and cultivated aquatic plants combined. Seaweed farming became an almost wholly cultivated sector.

By 2021 global fish production reached 182 million tonnes, split almost equally between capture at 91.2 million tonnes and aquaculture at 90.9 million tonnes. Reported aquaculture output reached 130.9 million tonnes valued at US$312.8 billion by 2022. The sector's expansion over three decades transformed global food supply.

Disease destroyed two major farmed stocks in China during the 1990s, forcing their replacement with other species. The episode illustrated the vulnerability of monoculture aquaculture to pathogens. It contributed to wider regulatory and husbandry reforms.

The Chinese Bureau of Fisheries reported a twelvefold increase in aquaculture harvests over seventeen years. By 2005 China accounted for 70 per cent of world production. This shift made Asia the dominant centre of global aquaculture capability.

The first vaccine used in aquaculture was applied in the USA in 1976. Early immersion vaccines were effective against vibriosis but not furunculosis, prompting the development of injectable water-based and then more efficient oil-based vaccines. Vaccination became central to managing disease in intensive fish farming.

Concerned about growing seafood demand and its impact on the oceans, the ocean explorer argued that feeding burgeoning human populations required marine production. The statement captured early optimism about a 'Blue Revolution' in aquaculture comparable to the Green Revolution in agriculture.