Circular bio‐economy in aquaculture

The way we produce our food is increasingly scrutinized and evaluated on its possible contribution to the global environmental changes world currently witnessing. Scientific evidence about negative effects of agriculture (including aquaculture) world's natural resources1-5 mounting. Food production considered as one most significant causes change.6, 7 planetary boundaries framework8, 9 offers a tool explore which extent are still operating within carrying capacity planet. In recent update,10, 11 six out nine were transgressed already. Even novel health threats such microplastics emerging.12, 13 Obviously, current bio-economy needs be revisited remain ‘safe space for future mankind’. A change circular bio-based economy focusing resource use efficiency minimizing impacts might prospective strategies achieve that goal. Muscat et al.14 presented five principles transform agro-food systems into bio-economy, example, safeguarding agro-ecosystems, avoiding waste, prioritizing biomass avoid food–feed–fuel competition, recycling by-products using renewable energy. Products and/or designed in they minimize their impact environment during whole lifetime. European Commission, Directorate-General Maritime Affairs Fisheries, al.15 Colombo Turchini16 transferred this idea area fisheries aquaculture framework economy, conceptualization design new appropriate systems, evaluating reuse wastes from fisheries/aquaculture, reducing equipment products sector exploring possibilities recycle. It all relates so-called three Rs, reduce, reuse, Reviews Aquaculture contributed already discourse circularity aquaculture. Roy al.17 provided virtual topical collection review articles published by between 2020 2021, together reflected some contemporary puzzles Following special issue (here), journal decided initiate physical entitled ‘Circular Bio-economy Framework Aquaculture’, proudly present today. was organized around four key processes circularity, designing (circular) aquacultural aquaculture, re-using materials biomasses. call papers, invited state-of-the-art reviews themes, fitting each above processes. With regard Conceptualizing called aquaponics, integrated multi-trophic etc.’. For topic, interesting emerged, relevant marine aquaculture,18 two inland aquaculture19 both.20, 21 Some lesser known approaches taken forefront Garibay-Valtez al.,20 Lothmann Sewilam,18 Zhao al.,21 while promising solutions wider industry perspective Marousek al.19 Reduce, stipulated ‘Reducing emissions footprints aquaculture’ complemented Arantzamendia al.22 feasibility innovations used emerging science field. Within process, further ‘Connecting research side streams (pharmaceutical, biofuel, etc.)’, theme. Yun al.23 how seaweed-farming waste could industrially lucrative. An review24 process ‘reduce’ reviewing resources would reduce land-use dependency Reuse, themes mentioned ‘valorization non-aquaculture ‘Improving safety issues emanating aquaculture’. Two reviews, nutrient at farm level25 another nutrients locked biomasses farm-to-fork level,26 showed several routes upcycling ecosystem human chain. latter paper reviewed also intricacies consumer acceptance, product quality, shelf life re-manufacturing certain pond RAS farmed fish. third review27 explored wastewater Recycling received submissions. ‘Plant microbial-based solutions’ ‘Food-feed conflicts feeds’. Altogether under block,11, 28-31 nicely summarizing relied biomass, decades ago till now. al.28 an overview blue foods have been fed concepts gradually aquafeed, leading potential candidates feeds. Wang al.32 transforming industrial gas edible through van Riel al.29 tackled ‘food-feed competition’ against background expected expansion. Ogburn al.30 substrate-based winner recycle bulk semi-refined agri-food biomass. Sunish co-authors31 gave naturally occurring, situ saprophytic microbes strengthening aquatic animal health. There topics where editors not receive enough submissions for. related ‘Systems-based thinking modeling’ ‘Energy emergy analysis models’. presents 15 papers prove well adopted community. now waiting widespread application these industry. cordially acknowledge immense help anonymous peer reviewers who helped us materialize issue. hope readers find thought-provoking.