It is now over 200 years since the water carrier in Luigi Cherubini’s opera expressed for the first time that without water our world would be an ‘empty barrel’. But this has in the meantime become a serious problem. Climate change is increasing the pressure to use water even more sparingly. This affects aquaculture in particular for almost two-thirds of global output are currently produced in fresh water.
This article was featured in EUROFISH Magazine 5 / 2020.
Consumers need more information about the benefits offered by today’s technologies
This article was featured in EUROFISH Magazine 4 / 2020.
Advances in biotechnology are opening up new opportunities that can benefit aquaculture, too, making it more efficient, more environmentally friendly, and more sustainable. The potential is enormous, but not all biotechnological methods and tools find acceptance in the public domain. Some consumers even reject genetic engineering outright. However, genetic engineering is only one of many opportunities that biotechnology offers us.
Although aquafeed manufacturers still can’t do completely without fishmeal and fish oil they are in the meantime much less dependent on marine ingredients and are increasingly using alternative raw materials to meet the protein and nutrient requirements of fish, shellfish and crustaceans. Modern processing methods today enable the use of numerous new resources.
This article featured in EUROFISH Magazine 2 2020.
According to the FAO an additional 27 million tonnes of seafood will have to be produced by 2030 in order to maintain the current supply level. This will be impossible without expanding aquaculture production, however, and will lead to an increased demand for aquafeed. That, in turn, poses enormous problems for the feed industry because the supply of fishmeal and fish oil cannot be increased at will without jeopardising the sustainability of industrial fishing. Traditionally, fishmeal has been the preferred source of protein for aquafeed due to its high protein content, well-balanced amino acid profile, and good digestibility. Global fishmeal production has been stagnating for more than 30 years, however, and might now even be on a decline. On average, the fishmeal industry uses about 20 million tonnes of raw materials a year for the production of approximately 5 million tonnes of fishmeal and 1 million tonnes of fish oil. Three quarters of this is processed to feed for aquaculture. Because the available quantities are not sufficient to meet demand the feed industry has to resort to alternative raw materials.
Microalgae are of fundamental importance for life in the oceans. With their photosynthesis they are the first link in the marine food chains upon which the existence of life in the oceans is based. Under certain conditions, however, uncontrolled mass development of the tiny algae can occur. The resulting algal blooms often have serious ecological and economic consequences and can even be toxic.
This article was featured in EM 1 / 2020.
Progress must be better conveyed
From simple earth ponds to offshore net enclosures and computer-controlled RAS: no other area of food production has changed so rapidly in such a short time as aquaculture. The pace of development is overwhelming for many consumers and outside the industry there are enormous gaps in knowledge which often leads to misunderstandings and even raises fears. More explanation and elucidation will be necessary to enable a constructive dialogue.
The term aquaculture has had some quite different meanings throughout history. It first appeared in 1855 in a newspaper article in connection with the storage of ice for cooling purposes in the summer months, and later on it was also used for irrigation practices in agriculture. Since the end of the 19th century (around 1890), however, it has increasingly been understood as a collective term for the methods used for the cultivation of aquatic plants and the rearing of various aquatic animal species. These mainly include fish, molluscs and crustaceans, but also aquatic reptiles, amphibians and some invertebrates, including echinoderms such as sea cucumbers or sea urchins. To be successful, aquaculture requires precise knowledge about the biology of the organisms produced, their food requirements, and their daily needs. In contrast to capture fisheries, which exploit fish stocks as a common pool resource, the plants and animals produced in aquaculture are the property of the producer or company.
This article was featured in the EUROFISH Magazine 6/2019.
FIAP profiwork fish stunner
When slaughtering fish in the EU, farmers or processors must apply the basic principle that governs the slaughter of terrestrial species, according to a report by the Aquaculture Advisory Council from 2017. This principle states that animals shall be spared any avoidable pain, distress or suffering during their killing and related operations. Fish should therefore be slaughtered using humane methods as far as possible. The report goes on to list systems with the potential to deliver humane slaughter, one of which is electrical stunning followed, if necessary, by a separate killing method.
This article was featured in EUROFISH Magazine 6/2019.
Objective evaluation criteria still lacking for many fish species
People keep animals for various reasons. Pets can be companions, they can play a part in hobbies or pastimes, or they can serve as test organisms in the laboratory. And of course – as farm animals – they are used for food purposes. In affluent countries, a change in values is currently taking place that is fundamentally questioning the right to use and exploit animals. Animal welfare is an increasingly significant aspect of successful marketing.
This article was featured in EUROFISH Magazine 5/2019.
Aquaculture continues to grow faster than other major food production sectors reports the FAO’s State of World Fisheries and Aquaculture 2018 (SOFIA). In the last few years this statement has become a motto for the European aquaculture sector to persuade local, regional, national and European regulators to develop consistent strategies and programmes to replicate global growth in the sector at the European level.
In 1956 only 1.2 million tonnes of farmed fish and seafood products were produced globally, a figure that climbed to 3.73m tonnes in 1976 (about 300%), and to 26.54 million tonnes (about 700%) over the next 20 years. Between 1996 and 2016 global aquaculture reached a peak of 80 million tonnes (about 300%) and is still growing, while growth in the European Union lags far behind. In this context the International Organisation for the Development of Fisheries and Aquaculture in Europe (EUROFISH) in collaboration with the General Fisheries Commission for the Mediterranean (GFCM), the Italian Ministry for Agriculture, Food, Forestry Policies and Tourism, and the Italian Fish Farmers Association (API), organised an event to discuss the future of European aquaculture as seen by a wide range of stakeholders. The international conference “Aquaculture Today & Tomorrow. Unlock the Potential” was attended by more than 100 participants from 28 countries.
Omega-3 fatty acids from microalgae instead of fish oil
Fish oil is not available in sufficient quantities to meet the growing needs of the aquaculture and nutraceutical industries. Although essential omega-3 fatty acids are also to be found in microalgae, production capacity has so far been low. That is now changing, however, and developments in this field are making rapid progress. The first feeds for aquaculture with omega-3 fatty acids from algae are now available on the market.
Human beings – like fish – have to consume a certain amount of essential, long-chain, polyunsaturated fatty acids with their food every day in order to stay healthy and develop "normally". The omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are particularly important. These are not produced in the body but must be obtained from food. Hundreds of scientific studies have revealed that EPA and DHA are of huge importance for the development and health of the brain, eyes and cardiovascular system.
With regard to their use in animal and aquaculture feed both of these fatty acids have up to now been obtained almost exclusively from marine fish oil sources. However, fish oil supply is limited because the available wild fish catches cannot be increased at will and they are also used more for direct human consumption. Global fish oil production is currently stagnant at around one million tonnes a year and is indeed tending to decline. This situation is already endangering the growth of aquaculture which uses almost three-quarters of worldwide fish oil production. Significant increases are not to be expected for the time being despite the fact that fish oil producers now also gain raw materials from previously unused reserves such as slaughterhouse waste and by-catches from the fishing sector which were previously discarded at sea immediately after the catch. It is estimated that 15 to 20 million tonnes more raw material could be taken from these sources each year. Hopes now also rest on the stocks of mesopelagic fish species which live in the oceans at depths of between 200 and 1,000 metres. Scientists have estimated their biomass at 10,000 million tonnes. If this is correct it would be by far the largest known fish resource. Access to these fish, however (they live at the upper limit of the deep sea) poses enormous risks to oceanic ecosystems because we still know far too little about the mesopelagic fish world to be able to use it sustainably.
Quality and food safety distinguish trout products
The Republic of Karelia is known as the principle region for cold-water fish farming, and especially for rainbow trout. Karelia differs from other regions of the North-Western district of Russia by its natural conditions which include a large number of deep-water reservoirs with high-quality water at the right temperature.
In 2018, aquaculture companies in Karelia produced a total of 27 200 tonnes of farmed products (up 10% compared to 2017), including 18 200 tonnes of commercial fish (up by 1% to 2017). Rainbow trout represents nearly the entire volumes of farmed fish (99.98%), while the rest is represented by European whitefish and sturgeon. In addition, over 13 tonnes of mussels were farmed in the White Sea.
Processing fish improves competitiveness
Processing of aquaculture products is a very dynamic part of the fish farming industry of Karelia. Large fish farms with significant production volume inevitably come to the idea of building their own processing facilities. The expansion of processing lines and a focus on products with high added value can significantly improve the competitive edge of enterprises during times of volatile market conditions and enable funds for further investment. At present, there are 63 fish farming companies in Karelia, of which 14 have processing plants. The product range includes fresh gutted trout, frozen trout, smoked trout, salted trout, marinated trout, salted trout roe, preserves and other products.
Fish farm Kala i Maryapuyta has been farming rainbow trout in the waters of the two largest lakes of northern Karelia, Upper Kuyto and Nyuk, for nearly twenty years. The enterprise’s production is about 2 000 tonnes per year, and the production cycle is based on the traditions and practices of Finnish trout farmers. Focus is kept on the proper feeding of rainbow trout, control of its growth, and timely sorting. Trout processing is carried out in facilities with modern equipment, where product safety and control is ensured by a HACCP system. The company is constantly working to expand the range of its products: in addition to the traditional salted trout roe, and smoked and salted trout, the company has started to produce trout in various sauces and ready-to-cook products.