Integrated Multi-Trophic Aquaculture (IMTA) is a practice in which the by-products (wastes) from one species are recycled to become inputs (fertilizers, food) for another.
Fed aquaculture (e.g. fish, shrimp) is combined with inorganic extractive (seaweed) and organic extractive (for example shellfish like mussels, or sea urchins) aquaculture to create balanced systems for environmental sustainability , economic stability -product diversification and risk reduction- and social acceptability -better management practices-.
Several integrated aquaculture projects have been started up the last few years, in different regions of the world (Japan, Canada, Chile, UK, Ireland, South Africa)
In Norway, Sintef, in association with NTNU are currently working on this sustainable way of sea farming.
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