Farming different species in RAS in Nordic countries: Current status and future perspectives

Dalsgaard, Johanne; Lund, Ivar; Thorarinsdottir, Ragnheiður I.; Drengstig, Asbjørn; Arvonen, Kaj; Pedersen, Palle

doi:10.1016/j.aquaeng.2012.11.008

Cited by 302 publications

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“…Recirculating aquaculture systems, on the other hand, have a high degree of water reuse (i.e., 95%-99%) [18], with water usage down to below 100 L kg −1 of fish produced [19]. In aquaponics, nitrate in excess is used for valuable plant production instead of being removed in gaseous form in denitrification units [20].…”

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Challenges of Sustainable and Commercial Aquaponics

et al. 2015

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Abstract:The world is facing a number of serious problems of which population rise, climate change, soil degradation, water scarcity and food security are among the most important. Aquaponics, as a closed loop system consisting of hydroponics and aquaculture elements, could contribute to addressing these problems. However, there is a lack of quantitative research to support the development of economically feasible aquaponics systems. Although many studies have addressed some scientific aspects, there has been limited focus on commercial implementation. In this review paper, opportunities that have the potential to fill the gap between research and implementation of commercial aquaponic systems have been identified. The analysis shows that aquaponics is capable of being an important driver for the development of integrated food production systems. Arid regions suffering from water stress will particularly benefit from this technology being operated in a commercial environment. OPEN ACCESSSustainability 2015, 7 4200

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Challenges of Sustainable and Commercial Aquaponics

et al. 2015

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“…The increasing demand for rainbow trout has led to an expanded effort to establish new RAS facilities throughout Europe (Terjesen et al 2013), and triggered investigation into diversification of salmonid production. Suggested alternative species are Arctic char Salvelinus alpinus L., brook char Salvelinus fontinalis Mitchill 1814, and their hybrids (Dalsgaard et al 2013;Svinger et al 2013). The feasibility of rearing these species in RAS has been confirmed in past studies (Dalsgaard et al 2013;Buric et al 2015b).…”

Section: Introductionmentioning

confidence: 88%

“…Suggested alternative species are Arctic char Salvelinus alpinus L., brook char Salvelinus fontinalis Mitchill 1814, and their hybrids (Dalsgaard et al 2013;Svinger et al 2013). The feasibility of rearing these species in RAS has been confirmed in past studies (Dalsgaard et al 2013;Buric et al 2015b). However, the suitability of brook char for intensive recirculating hatcheries has not been evaluated.…”

Section: Introductionmentioning

confidence: 88%

Feasibility of rearing brook char fingerlings in an intensive recirculating hatchery as a complementary species to rainbow trout

Buřič¹,

Bláhovec²,

Kouřil³

2016

CZECH J ANIM SCI

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Aquaculture, as the fastest growing agriculture sector, is currently focused on exploring the development of effective intensive recirculating systems (RAS). The use of intensive RAS requires a stable supply of fingerlings throughout the year. Salmonids are a highly important aquaculture species, with rainbow trout Oncorhynchus mykiss often reared in freshwater RASs. The dominant position of rainbow trout has triggered the investigation of a wider diversification of species, including brook char Salvelinus fontinalis. Brook char has the potential to be reared in facilities similar to those used for rainbow trout, but it is not known if brook char is suitable for hatching in an intensive recirculating hatchery system (RHS) to provide a consistent supply of fingerlings to an associated RAS roughly every three months. The present study evaluated the feasibility of producing brook char fingerlings in an RHS and compared results to those obtained with rainbow trout. A production cycle from eyed egg to fingerling was completed separately for rainbow trout, brook char, and parallel rearing of both species for the comparison of growth rate, feed conversion ratio, and the time to reach individual fingerling weight of 2 g. The results showed slower growth rate of brook char compared to rainbow trout reared under the same conditions and a significantly longer production cycle (~108 days), compared to rainbow trout (~74 days). Results suggest that brook char is not suitable for parallel rearing in facilities with primary rainbow trout production. The main practical problem is disruption of the production cycle which requires fingerling stocking at 3-month intervals.

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“…In this respect, 1 kg of beef meat requires between 5000 and 20,000 L of water (IME, 2013) and the same amount of fish bred in semi-intensive and extensive conventional aquaculture systems requires a range of 2500-375,000 L (AlHafedh et al, 2003). Recirculating aquaculture systems, on the other hand, have a high degree of water reuse (i.e., 95%-99%) (Dalsgaard et al, 2013), with water usage down to below 100 L kg −1 of fish produced (Martins et al, 2011). In aquaponics, nitrate in excess is used for valuable plant production instead of being removed in gaseous form in denitrification units (Van Rijn, 2013).…”

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confidence: 99%

Opportunities and Challenges of Multi-Loop Aquaponic Systems

Goddek

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v Preface Which of us is not familiar with this situation during the student time: on a Wednesday night, one wants to go out to grab a beer ("just one Duveltje") with friends. Until the end of the night (and several beers later) one was trapped in several discussions about religion, politics, and one's field of study. I have to admit, that I have been involved in plenty of such discussions, which also stems from the fact that I am a very discussion-friendly and curious person. However, I caught myself often saying the same sentence "well, the idea is great, but it actually does not really work as it should" with respect to two topics: Aquaponics and Communism. This might appear to be a somewhat far-fetched statement, however, for those who have neither read Marx nor followed the development of aquaponics the last 30 years: in a nutshell it can be stated that both of these ideas follow bottom-up (i.e. local and circular) approaches (i.e. for small farmers and individuals).Additionally to the above, I honestly believe that in times of the financial crisis -in which multinational corporations such as [think of big corporations that produce GMO seeds that are immune to their pesticides] increase their quasi-monopoly positions on the global food market -a paradigm shift back to human-centred and sustainable agricultural development is required to ensure both (1) healthy (i.e. pesticide free) diets and (2) food independence. In contrast, organic, fair trade, and GMO-free food have recently gained rapidly increasing popularity. Consumers want transparent and extensive information about the origin and manufacture of the foodstuffs they buy. The development of agriculture and how to use (finite) resources efficiently will be crucial with respect to the global development and the future of the earth in general. Right now, we are at a crossroads in our history that will determine whether either the people or the corporations will be empowered. I intended to provocatively illustrate this new class conflict on the book cover with the objective to polarize and thus energize the readers themselves to make thoughts and reflections.So far, I have dedicated over 4 years of my life to study and improve aquaponic systems in the hope that one day their production efficiency will be able to compete with state-of-theart hydroponic food production systems, while improving circularity. In this thesis, I will try to demonstrate why aquaponics does not face the same pitfalls as communism, while sharing the empowering people-minded and bottom-up qualities that are required in the 21st century.

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Farming different species in RAS in Nordic countries: Current status and future perspectives

Cited by 302 publications

References 47 publications

Challenges of Sustainable and Commercial Aquaponics

Challenges of Sustainable and Commercial Aquaponics

Feasibility of rearing brook char fingerlings in an intensive recirculating hatchery as a complementary species to rainbow trout

Opportunities and Challenges of Multi-Loop Aquaponic Systems

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