Toward the Circular Economy in the Aquaculture Sector: Bibliometric, Network and Content Analyses

Sustainability, Journal Year: 2024, Volume and Issue: 16(13), P. 5405 - 5405

Published: June 25, 2024

This paper offers an overview of circular economy strategies applied to the aquaculture sector. The growing challenges imposed on sector by Green Deal impose new growth in name sustainability. scalability these is increasingly hampered regulatory voids and absence a universally accepted assessment method for measuring impacts current systems. More than ever, review knowledge field required comprehend where heading, order make transition. present proposes bibliometric analysis, network analysis content which highlight very expanding research. studies were firstly analyzed from micro (animal metabolism) macro perspective (policies, markets society), emphasizing research still lacking. Furthermore, second level classification concerns type circularity approach proposed system, can be divided into open-loop or closed-loop strategies. Regarding open-loop-related studies, focus evaluation devoted different bioeconomic values biological flows entering exiting system. literature offered insights identification threads that are developing around

Language: Английский

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Effect of feed ingredients on nutrient digestibility, waste production and physical characteristics of rainbow trout (Oncorhynchus mykiss) faeces.

Aquaculture, Journal Year: 2023, Volume and Issue: 574, P. 739621 - 739621

Published: April 27, 2023

This study assessed the effect of different dietary ingredients on quantity and characteristics faecal waste produced by rainbow trout (Oncorhynchus mykiss). Seven were tested: fish meal (FM), mussel (MM), poultry wet rendered (PM-W) or dry (PM-D), insect (IM), single cell protein (SCP) brewers grain (BGP). Eight experimental diets formulated: a control diet (CON) being predominantly plant-based seven test diets, which contained 70% CON 30% one ingredients. Rainbow juveniles (65 g, 30 fish/tank) fed at satiation for six weeks in triplicate groups. Dry matter (DM) nutrient digestibility measured. To estimate characteristics, particle size distribution (PSD) removal efficiency was determined. Nutrient differed significantly. Growth did not differ between but DM affected diet. Diets amount produced, its (%) non-removed faeces (g DM/kg feed). The highest lowest observed FM BGP respectively. Accordingly, resulted (37 g feed), while (125 feed) faeces. Additionally, it also that differences can compensate variation produced. Consistent with data, PSD influenced diets. MM proportion particles <40 μm size, had largest this range. Furthermore, ingredient composition evident stability faeces, producing most stable, whereas CON, SCP resulting relatively unstable pellets. In addition, due to inclusion level nutrients their corresponding digestibility, chemical Overall, showed influences is an important factor determining efficiency, PSD, trout.

Language: Английский

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Black soldier fly (Hermetia illucens) larvae improve growth performance and flesh quality of African catfish (Clarias gariepinus)

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1)

Published: Feb. 19, 2025

Language: Английский

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Informed choice: The role of knowledge in the willingness to consume aquaculture products of different groups in Germany

Aquaculture, Journal Year: 2022, Volume and Issue: 556, P. 738319 - 738319

Published: May 3, 2022

Language: Английский

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Country-specific food culture and scientific knowledge transfer events – Do they influence the purchasing behaviour of seafood products?

Aquaculture, Journal Year: 2022, Volume and Issue: 560, P. 738590 - 738590

Published: July 8, 2022

A positive perception of aquaculture products is essential to boost production by using more sustainable and eco-friendly solutions. However, consumer resulting purchasing decisions remain poorly understood. In most European countries, the tends be rather negative, which reinforced knowledge gaps misleading information from media. This believed have greatest impact on current low consumption rate farmed fish across Europe. Previous research has suggested that consumers may often reluctant change their seafood behaviour despite having a solid scientific understanding mode production. this study, we investigated extent country-specific contexts degree contribute To end, interactive poster surveys semi-structured interviews were conducted at eight different transfer events (KTEs) three targeting 383 participants. The application yet underutilized method, an survey, underscored need use new approaches tackle behaviour. Our results indicate increased does not lead changes in per se. Perceptions habits are very contextual vary culture culture. points highly interlinked nature marine food ranges between individual awareness, knowledge, socio-cultural contexts, all renders decisions. suggest focusing sustainability product emphasising ongoing transition towards circular economy approach sector promising pathway foster sustainability-driven sector. findings also question whether trying educate public about criteria really key patterns or working assumptions wrong approaches. conclusion, lack clear easily accessible appears main barrier social acceptance

Language: Английский

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Adult European Seabass (Dicentrarchus labrax) Perform Well on Alternative Circular-Economy-Driven Feed Formulations

Sustainability, Journal Year: 2022, Volume and Issue: 14(12), P. 7279 - 7279

Published: June 14, 2022

There is an increasing need in the aquaculture industry for more sustainable and functional feed concepts marine finfish. This study provides results effect of alternative formulations on health status, welfare parameters, sensory analysis, growth performance European seabass (Dicentrarchus labrax) over 83-day feeding trial. Fish were fed twice a day with five experimental diets. A control diet (control) four different rich processed animal proteins (PAP), other ingredients (NOPAP), positive (NOPAP+) negative (PAP−) formulation tested. All contained hydrolysates from by-products macroalgae. The indicate that are alternatives compared commercial diet. Equally interesting, did not affect analysis fillet quality or welfare. These increasingly important factors products and, accordingly, also new feeds. Feed only their production, have shorter transportation distances, recycle resources (usage by-products), no adverse parameters highly needed. Therefore, diets tested this win-win concept future production.

Language: Английский

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Practical low-fishmeal diets for rainbow trout (Oncorhynchus mykiss) reared in RAS: Effects of protein meals on fish growth, nutrient digestibility, feed physical quality, and faecal particle size

Aquaculture Reports, Journal Year: 2022, Volume and Issue: 28, P. 101435 - 101435

Published: Dec. 15, 2022

To evaluate strategies for optimizing waste in recirculating aquaculture systems, 1020 rainbow trout (initial live weight 17.2 ± 7.50 g/fish) were distributed into 12 tanks after 21 d of acclimation and fed during 84 days with four practical diets (crude protein: 49% DM; crude fat 26% gross energy: 23 MJ kg-1) containing different rates fishmeal alternative protein meals, i.e. Diet FM (307 g kg-1 fishmeal, 61.2 poultry by-product meal); diet PBM (183 168 FeM (198 meal, 76.5 hydrolysed feather FeM+RM (171 60.4 rapeseed meal). High structural integrity extruded pellets low oil leakage measured all diets, while the lowest water turbidity at 15 min feed administration was recorded (2.7 vs. 12.7 mg L-1; p < 0.05). Diets did not affect fish specific growth rate (2.16% d-1). The apparent digestibility (79.6%) highest (86.0%) (p 0.001); lipids higher than other (84.4% 85.5% 66.4% 71.1%; 0.001). Fish showed a percentage retained faeces mesh sizes 0.5–0.8 mm (33% 30%; 0.005) 0.3–0.5 (64% 59%; 0.001) compared diets. replacement by-product- meal had positive effects on nutrient faecal particle size. feathers meals impaired but implications turbidity.

Language: Английский

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Circadian rhythm in turbot (Scophthalmus maximus): daily variation of blood metabolites in recirculating aquaculture systems

Metabolomics, Journal Year: 2024, Volume and Issue: 20(2)

Published: Feb. 12, 2024

Abstract Introduction Animal welfare in aquaculture is becoming increasingly important, and detailed knowledge of the species concerned essential for further optimization on farms. Every organism controlled by an internal clock, circadian rhythm, which crucial metabolic processes partially influenced abiotic factors, making it important practices. Objective In order to determine rhythm adult turbot ( Scophthalmus maximus ), blood samples were collected over a 24-h period plasma metabolite profiles analyzed 1 H-NMR spectroscopy. Methods The fish habituated feeding times at 9 am 3 pm with NMR spectroscopy 46 metabolites could be identified, eight appeared shift throughout day. Results We noted exceptionally high values around amino acids isoleucine, leucine, valine, phenylalanine, lysine, stress indicator lactate. These peaks interpreted as either habituation usual time or natural peak levels circle because other indicators (glucose, cortisol lysozymes) showed stable baseline, indicating that animals had no very little during experimental period. Conclusion This study provides initial insights into diurnal variation turbot; however, studies are needed confirm present findings possible fluctuations sugars. Implementing optimized (with sugars low metabolites) lead less stress, fewer disease outbreaks overall improved facilities.

Language: Английский

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Candidate raw materials for a sustainable feeding of greater amberjack (Seriola dumerili) reared in recirculating aquaculture systems: Apparent digestibility, physical properties of diets and faeces, and postprandial nitrogen excretion

Aquaculture, Journal Year: 2024, Volume and Issue: 591, P. 741117 - 741117

Published: May 23, 2024

To evaluate the raw material digestibility, physical characteristics of diet pellets and faeces, postprandial nitrogen excretion in greater amberjack (Seriola dumerili) reared recirculating aquaculture systems (RAS), 10 diets were obtained by mixing a reference (CP: 51.8% DM; EE: 13.6% DM) with one ten materials (7:3 ratio), i.e. fishmeal (FM), porcine haemoglobin (PH), fermented soybean (FS), protein concentrate (SPC), hydrolysed wheat (HWP), potato (PP), beet pulp (BP), beer yeast without fat (BY), (BYF), Lithothamnium seaweed (LS). Twenty fish (268.9 ± 94.3 g) randomly distributed into 5 RAS tanks (4 per tank) fed for 140 days experimental diets. A Latin square design was used based on × two rounds (10 ingredients, 2 weeks tank). The highest ADCs dry matter recorded PH (83.0% 88.4%, respectively), FM (81.8% 84.3%), SPC (77.4% 82.5%), BYF (73.0% 80.9%) while lowest ones BY (64.4% 70.8%), HWP (59.8% 69.9%), PP (48.3% 69.8%), BP (53.7% 55.8%) (p < 0.05). EAA PH, compared to other materials; lipids above 90% all > Regarding properties, associated value oil leakage whereas (0.18% vs. 0.11%; p 0.05); FS, HWP, BYF, produced less turbidity water after 15 min than (3.68 mg L−1 average 6.01 L−1; faeces size, volume fresh fine-size class those (62.1% 69.2% average; rate retained at sieve mesh interval 1.0 mm 1.2, (1.16% 0.34%; maximum (mg N-NH4+ kgfish−1 h) reached between 4 h feed ingestion differences among Overall, findings this investigation will contribute sustainable formulation aquafeed optimized tailored promising Mediterranean species.

Language: Английский

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Status of Fishery Discards and By-Products in Greece and Potential Valorization Scenarios towards a National Exploitation Master Plan

Marine Drugs, Journal Year: 2024, Volume and Issue: 22(6), P. 264 - 264

Published: June 7, 2024

The valorization of aquaculture/fishery processing by-products, as well unavoidable/unwanted catches and discards in Greece, is currently an underutilized activity despite the fact that there are several best practices Northern Europe overseas. One main challenges to determine whether available quantities for sufficient warrant fish side streams. This first attempt systematically record analyze by-products Greece spatially temporally effort create a national exploitation Master Plan this unavoidable unwanted biomass. A thorough survey conducted within VIOAXIOPIO project unveiled substantial biomass around 19,000 tonnes annually could be harnessed valorization. Furthermore, production various High-Added-Value Biomolecules (HAVBs) was investigated experimental trials were assess potential yields, with collected data used formulate four scenarios.

Language: Английский

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