Status quo of commercial aquaponics in Czechia: A misleading public image?

Tůmová, Veronika; Klímová, Anita; Kalous, Lukáš

doi:10.1016/j.aqrep.2020.100508

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…Aquaculture is also less diverse: $88% by carp farming in fishponds and $12% trout and percids in RAS. [17][18][19] With assumed zero-waste and a current Czech population of 10.3 million, the annual per capita fish production is $2 kg. However, zero-waste is seldom the case.…”

Section: Czech Aquaculture's Farm-to-fork Losses: a Case Examplementioning

confidence: 99%

“…Czechia is a small, land‐locked and temperate (short vegetative season) Central European country with aquaculture production of ~20,000 tons. Aquaculture is also less diverse: ~88% by carp farming in fishponds and ~12% trout and percids in RAS 17–19 . With assumed zero‐waste and a current Czech population of 10.3 million, the annual per capita fish production is ~2 kg.…”

Section: Czech Aquaculture's Farm‐to‐fork Losses: a Case Examplementioning

confidence: 99%

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Biomass losses and circularity along local farm‐to‐fork: A review of industrial efforts with locally farmed freshwater fish in land‐locked Central Europe

Mráz

Jia

Roy

2022

Reviews in Aquaculture

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Biomass losses and circularity of aquaculture farm-to-fork are reviewed in this article, taking the example of an economically developed but land-locked territory in Central Europe. We found that some waste valorization channels of locally farmed and slaughtered fish biomass are already functioning in the region (mostly for pet food, hunting bait). There is neither control nor information on how much local aquaculture farm-to-fork losses are upcycled to the local human food chain. Despite most of them qualify in 'category-3' animal by-products (useable for aquafeed) or preventable losses. Factors to improve farm-to-fork resource use efficiency 'locally' include:(a) 'at farm' (supplementary feeding, captive culture conditions, fat content, breed, rested harvest techniques, harvesting season); (b) 'towards fork' (purging duration, acclimatization before slaughtering, stunning efficacy, bleeding and filleting relative to rigour mortis, additive-based cleaning, pre-cooling, boned or deboned, grinding or baadering); (c) 'at fork' (coating-or GRAS additives-based preservation, packaging, modern hurdle systems, freezing rate, interferences of freezing apparatus or packaging on freezing, storage temperature). From farm-to-fork, it is essential to understand that most fish processing by-products can be made edible or valuable by other means. Better utilization strategies exist via low-cost value-added fish products, innovative dishes or utility products (e.g., feedstuff, fertilizers, industrial products, luxury items). Although upcycling to human food chain is priority, technological hurdles (prone to spoilage, bones in product, taste, safety) are associated with edible products but are solvable. More difficult things to overcome are at the fork (culinary industry, communication with society, future generations). Those are reviewed.aquaculture, aquaculture post-harvest, aquaculture product quality, biomass use efficiency, circular bioeconomy, fish | INTRODUCTIONApproximately one-third of all food produced for human consumption is presently lost or wasted, equivalent to $8% of all global greenhouse gas (GHG) emissions caused by humans. 1,2 Food losses also highlight the inequity of our current food system. For example, while 88 million tonnes of food are wasted yearly in the European Union (EU), in 2017, 112 million people in the EU had limited access to suitable food and healthy diets. Food waste comprises up to 16% of Europe's total emissions impact (various categories) on the entire food supply chain.A recent estimate shows that 186 Mt CO 2 -eq (global warming potential), 1.7 Mt SO 2 -eq (acidification potential), and 0.7 Mt PO 4 -eq

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Section: Czech Aquaculture's Farm-to-fork Losses: a Case Examplementioning

confidence: 99%

Section: Czech Aquaculture's Farm‐to‐fork Losses: a Case Examplementioning

confidence: 99%

Biomass losses and circularity along local farm‐to‐fork: A review of industrial efforts with locally farmed freshwater fish in land‐locked Central Europe

Mráz

Jia

Roy

2022

Reviews in Aquaculture

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“…In this context, alternative cultivation methods, such as aquaponics, which integrates soilless growing techniques (hydroponics) with aquaculture, are gaining increasing importance (Somerville et al, 2014;Tu ˚mová et al, 2020;Yavuzcan Yildiz et al, 2017). The aquaponic systems can be installed in all geographic regions, particularly in urban centers and locations close to markets, making them a feasible agricultural model.…”

Section: Introductionmentioning

confidence: 99%

The effect of swimming activity and feed restriction of rainbow trout (Oncorhynchus mykiss) on water quality and fish‐plant growth performance in aquaponics

Tunçelli,

Memiş

2024

Journal of Fish Biology

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In this study, we investigated the effects of swimming activity and feed restriction on juvenile rainbow trout (Oncorhynchus mykiss) in decoupled aquaponic systems. Our focus was on assessing their impact on water quality parameters within the aquaponic setup and evaluating the growth performance of the fish, including final weight (FW), condition factor (K), coefficient of variation (c.v.) in weight, specific growth rate (SGR), total feed intake (g/fish), feed conversion rate (FCR), hepatosomatic index (HSI), and viscerosomatic index (VSI), as well as the growth of lettuce (Lactuca sativa L. var. elmaria). The study involved 108 juvenile rainbow trout with an average initial weight of 26.54 ± 0.36 g and 60 ten‐day‐old lettuce seedlings, over a period of 42 days. We designed four treatment groups, each with three fish tanks: static ad libitum (SA), where fish were in static water conditions and fed to satiation; static restriction (SR), with fish in static water and a 25% feed restriction; current ad libitum (CA), where fish experienced forced swimming at 1 BL s−1; and current restriction (CR), with swimming exercise at 1 BL s−1 and a 25% feed restriction. Using a flow rate of 1 BL s−1 in the tanks for rainbow trout yielded several benefits. Notably, the fish in the CA group exhibited increased feed intake (60 ± 1.78 g fish−1) and enhanced fish growth with an FW of 91.72 ± 0.91 g, compared to the SA group (55.88 ± 0.88 g fish−1 for feed intake and 89.26 ± 0.81 g for FW). In contrast, the CR group showed a reduced feed intake (39.02 ± 2.78 g fish−1) and a lower FW (67.85 ± 1.49 g) compared to the CA group. In addition, the CA group demonstrated positive contributions to fish development with a reduced HSI (1.26 ± 0.02) in comparison to the SA group (1.56 ± 0.14). Inadequate nutrient provisioning in the SR and CR groups negatively impacted fish growth and system efficiency. Our findings suggest that optimizing water flow and feed benefits fish and plants and enhances system sustainability.

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“…In addition, it also qualifies as an organic farming method for vegetables and fish production, utilizing sustainable food production technology [ 17 ]. However, this system is still more popular as a hobby rather than for commercial- scale production [ 18 ]. The problems with this system are turbidity, a high content of toxic nitrogen compounds (ammonia, and nitrite), and low dissolved oxygen in water.…”

Section: Introductionmentioning

confidence: 99%

Activated Carbon Preparation from Sugarcane Leaf via a Low Temperature Hydrothermal Process for Aquaponic Treatment

Tawatbundit

Mopoung

2022

Materials

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The effects of hydrothermal treatment, 0–5% KMnO4 content, and 300–400 °C pyrolysis temperature, were studied for activated carbon preparation from sugar cane leaves in comparison with non-hydrothermal treatment. The percent yield of activated carbon prepared by the hydrothermal method (20.33–36.23%) was higher than that prepared by the non-hydrothermal method (16.40–36.50%) and was higher with conditions employing the same content of KMnO4 (22.08–42.14%). The hydrothermal and pyrolysis temperatures have the effect of increasing the carbon content and aromatic nature of the synthesized activated carbons. In addition, KMnO4 utilization increased the O/C ratio and the content of C-O, Mn-OH, O-Mn-O, and Mn-O surface functional groups. KMnO4 also decreases zeta potential values throughout the pH range of 3 to 11 and the surface area and porosity of the pre-hydrothermal activated carbons. The use of the pre-hydrothermal activated carbon prepared with 3% KMnO4 and pyrolyzed at 350 °C as a filter in an aquaponic system could improve the quality of water with pH of 7.2–7.4, DO of 9.6–13.3 mg/L, and the turbidity of 2.35–2.90 NTU. It could also reduce the content of ammonia, nitrite, and phosphate with relative removal rates of 86.84%, 73.17%, and 53.33%, respectively. These results promoted a good growth of catfish and red oak lettuce.

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Status quo of commercial aquaponics in Czechia: A misleading public image?

Cited by 7 publications

References 28 publications

Biomass losses and circularity along local farm‐to‐fork: A review of industrial efforts with locally farmed freshwater fish in land‐locked Central Europe

Biomass losses and circularity along local farm‐to‐fork: A review of industrial efforts with locally farmed freshwater fish in land‐locked Central Europe

The effect of swimming activity and feed restriction of rainbow trout (Oncorhynchus mykiss) on water quality and fish‐plant growth performance in aquaponics

Activated Carbon Preparation from Sugarcane Leaf via a Low Temperature Hydrothermal Process for Aquaponic Treatment

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