Anthony Cheshire is a scientist and academic living and working in South Australia. Over his professional career he has served as the Head, Department of Botany in the University of Adelaide (1994-1998), as the Chief Scientist of SARDI (South Australian Research and Development Institute) Aquatic Sciences division (2000-2004) and as Director Research and Development of SARDI (2005). Over the course of his career his scientific research has focussed on understanding and measuring human impacts on the natural environment with a particular focus on the development of methods to assess the health and anthropogenic impacts in coastal marine environments.
Earlier in his career Anthony Cheshire worked as a research scientist at the Australian Institute of Marine Science (AIMS 1986-1989) and as an Academic in the Department of Botany at the University of Adelaide (1989-2000). In more recent years he has moved into the private sector although he has held numerous Adjunct, Affiliate and Advisory roles with South Australian Universities and Government Departments (including Adjunct and Affiliate appointments as Professor with both the Flinders University of South Australia and with the University of Adelaide).
His research work has spanned a number of key areas and initiatives including the ecology and ecophysiology of temperate and tropical macro-algae, [1] the ecophysiology of tropical corals and sponges [2] and the impact of aquaculture on coastal systems with a significant focus on the development of the state's Southern bluefin tuna seacage aquaculture sector. [3] [4] He has also participated in various scientific expeditions one of which resulted in the discovery of 8 new species of jellyfish collected from the Great Australian Bight [5] (including the eponymous Amphinema cheshirei [6] which was named after Anthony Cheshire who led a research expedition to the Nuyts archipelago in 2002). [5] [7]
In 2009 Anthony Cheshire led an international team of coastal scientists in a project that developed methods to assess marine litter (marine debris) in both coastal and open ocean environments. This work, funded by the United Nations Environment Programme (UNEP) in collaboration with the International Oceanographic Commission (IOC), has been published and forms the backbone of many national and trans-national marine debris survey programs. [8]
Cheshire and his students worked across a range of macro-algal systems including studies on the southern bull-kelp (Durvillaea potatorum) as well as numerous studies on the production ecology of kelp and fucoid dominated systems in South Australia. [9] This work involved the development of novel technologies for quantifying the in-situ photosynthetic rates by macro-algal including both mixed-fucoid and turf algal communities. [1] In addition the work involved assessing anthropogenic impacts on coastal macro-algal communities from impacts such as beach sand replenishment dredging [10] and degraded coastal water quality. [11]
In more recent years Cheshire has focussed on the improved utilisation of macro-algal resources including the challenges in developing a macro-algal industry in Australia. [12]
A substantial proportion of Cheshire's research work focused on the environmental impacts of tuna farming in Spencer Gulf. Subjects included early investigations of the environmental effect of tuna seacages, [13] measurement and modeling of nitrogen loads, [14] [15] sediment geochemistry, [16] developing a methodology for assessing seabed impacts, [17] nutrient influence on the seabed, [18] waste mitigation, [19] oxygen availability in sea cages, [20] net fouling communities and synthetic anti-fouling treatments, [21] [22] and regional monitoring systems. [23] He also researched means of lowering the cost of environment assessments for the tuna aquaculture sector [24] [25] and helped improve net designs to allow Great white sharks that enter sea-cages by leaping or biting their way in to be released without harm. [26] [27] [28]
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. 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.
Mariculture or marine farming is a specialized branch of aquaculture involving the cultivation of marine organisms for food and other animal products, in enclosed sections of the open ocean, fish farms built on littoral waters, or in artificial tanks, ponds or raceways which are filled with seawater. An example of the latter is the farming of marine fish, including finfish and shellfish like prawns, or oysters and seaweed in saltwater ponds. Non-food products produced by mariculture include: fish meal, nutrient agar, jewellery, and cosmetics.
The National Pollutant Inventory (NPI) is a database of Australian pollution emissions managed by the Australian Commonwealth, State and Territory Governments. A condensed version of the information collected is available to the public via the Department’s website.
The southern bluefin tuna is a tuna of the family Scombridae found in open southern Hemisphere waters of all the world's oceans mainly between 30°S and 50°S, to nearly 60°S. At up to 2.5 metres and weighing up to 260 kilograms (570 lb), it is among the larger bony fishes.
Integrated multi-trophic aquaculture (IMTA) provides the byproducts, including waste, from one aquatic species as inputs for another. Farmers combine fed aquaculture with inorganic extractive and organic extractive aquaculture to create balanced systems for environment remediation (biomitigation), economic stability and social acceptability.
A wild fishery is a natural body of water with a sizeable free-ranging fish or other aquatic animal population that can be harvested for its commercial value. Wild fisheries can be marine (saltwater) or lacustrine/riverine (freshwater), and rely heavily on the carrying capacity of the local aquatic ecosystem.
Aquaculture started to take off in New Zealand in the 1980s. It is dominated by mussels, oysters and salmon. In 2007, aquaculture generated about NZ$360 million in sales on an area of 7,700 hectares. $240 million was earned in exports.
Aquaculture in Australia is the country's fastest-growing primary industry, accounting for 34% of the total gross value of production of seafood. 10 species of fish are farmed in Australia, and production is dominated by southern bluefin tuna, Atlantic salmon and barramundi. Mud crabs have also been cultivated in Australia for many years, sometimes leading to over-exploitation. Traditionally, this aquaculture was limited to pearls, but since the early 1970s, there has been significant research and commercial development of other forms of aquaculture, including finfish, crustaceans, and molluscs.
Seaweed farming or kelp farming is the practice of cultivating and harvesting seaweed. In its simplest form farmers gather from natural beds, while at the other extreme farmers fully control the crop's life cycle.
Copper alloys are important netting materials in aquaculture. Various other materials including nylon, polyester, polypropylene, polyethylene, plastic-coated welded wire, rubber, patented twine products, and galvanized steel are also used for netting in aquaculture fish enclosures around the world. All of these materials are selected for a variety of reasons, including design feasibility, material strength, cost, and corrosion resistance.
Offshore aquaculture, also known as open water aquaculture or open ocean aquaculture, is an emerging approach to mariculture where fish farms are positioned in deeper and less sheltered waters some distance away from the coast, where the cultivated fish stocks are exposed to more naturalistic living conditions with stronger ocean currents and more diverse nutrient flow. Existing "offshore" developments fall mainly into the category of exposed areas rather than fully offshore. As maritime classification society DNV GL has stated, development and knowledge-building are needed in several fields for the available deeper water opportunities to be realized.
South Korea is a major center of aquaculture production, and the world's third largest producer of farmed algae as of 2020.
Saltwater fish, also called marine fish or sea fish, are fish that live in seawater. Saltwater fish can swim and live alone or in a large group called a school.
Dr Hagen Heinz Stehr AO is a German-born multi-millionaire businessman, tuna fisherman and founder of the Stehr Group.
Brian Jeffriess is the primary spokesperson for Australia's Southern bluefin tuna fishing and aquaculture industry. He lives in Port Lincoln, South Australia and is the chief executive for the Australian Southern Bluefin Tuna Industry Association. He is a current member of the Australian Maritime and Fisheries Academy, the Commonwealth Fisheries Association, the Aquaculture Advisory Committee and the Fisheries and Aquaculture Research Advisory Committee. Jeffriess features regularly in the Port Lincoln Times newspaper, where he relates the industry's activities and interests to his local community. He attends the international Commission for the Conservation of Southern Bluefin Tuna meetings and works closely with industry and government. On 26 January 2012 Jeffriess was awarded Member of the Order of Australia "for service to the fishing and aquaculture industries as a contributor to the sustainable management and harvesting of Australian fisheries and through national and international professional associations." He has also been awarded State and National Seafood Icon status.
Tuna penning is a practice used in marine aquaculture, in which smaller tuna are caught off shore and moved back to large, in-water enclosures. The pens are typically located in the relatively shallow waters of sheltered areas, such as bays or coves. Tuna penning is primarily used for Atlantic Bluefin Tuna (ABT), a highly profitable stock for the global fish market. The tuna caught for penning are typically caught between May and July by purse-seine vessels, and then transported back to pens, where they are fattened until October–January before being frozen and shipped out. While in the pens, the tuna are fed primarily fresh fish, such as sardines, squid, and mackerel. In the past decade, tuna penning has become a large sector within the fish aquaculture industry, and takes place primarily in the Mediterranean. In 2010, ABT constituted 8% of global fish exports, the majority of which was shipped to Japan. Tuna penning is regulated by the International Commission for the Conservation of Atlantic Tunas (ICCAT), and each farm is required to register both the number of tuna it has and the total capacity of the farm.
Oceanic Victor is an Australian privately owned company which runs marine tourism facilities on and adjacent to Granite Island, Encounter Bay, South Australia. The company's main attraction is a floating at-sea aquarium containing Southern blue fin tuna and other marine species. The facility is located within a Habitat Protection Zone of the Encounter Marine Park and opened to the public on 2 September 2017. Since 2019 it has been open intermittently while work has been undertaken on the causeway to Granite Island and owing to COVID19 restrictions in 2020. As of 2021, the attraction is in Port Lincoln where it is undergoing maintenance. It is expected to reopen in 2022 once work on the causeway is complete.
Craig Foster is the CEO of Clean Seas, an ASX-listed Australian seafood company with interests in southern bluefin tuna and yellowtail kingfish farming. He was appointed to the position in 2012 after working in the salmon farming industry in Tasmania. There he managed research and development at the state's largest salmon hatchery and also worked as the Managing Director of fish feed producer, Gibsons Ltd. In 2001, he was working for Pivot, and assisting in the development of barramundi farms in the Northern Territory.
Clean Seas Seafood Ltd is an Australian seafood production company specialising in the sea-cage aquaculture of Yellowtail kingfish. It was established by The Stehr Group in 2000, and became the first Australian company fish farming in South Australia to be listed on the ASX in 2005. The company was established by "tuna baron" Hagen Stehr, whose son Marcus remains one of the company's directors. Clean Seas has shore and sea-based fish farming facilities at Arno Bay, aquaculture leases in Fitzgerald Bay and near Port Lincoln and a processing facility at Royal Park in Adelaide. Its tuna interests were originally held by the private company Australian Tuna Fisheries Pty Ltd. Clean Seas' ambition to control and commercialise the lifecycle of the Southern bluefin tuna has not been realised.
Fish farming is a major economic contributor to South Australia's seafood sector. The most valuable species is the Southern bluefin tuna, which is caught in the wild then transferred into sea cages in southern Spencer Gulf where they are fed locally caught sardines. The second most valuable species is the Yellowtail kingfish, which is farmed near Port Lincoln and Arno Bay. A tourist venture called Oceanic Victor located in Encounter Bay allows paying customers the opportunity to swim in a sea cage with the Southern bluefin tuna and handfeed the fish. Prominent companies in the fish farming sector in South Australia include Clean Seas and Tony's Tuna International.
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