Microencapsulated algal feeds as a sustainable replacement diet for broodstock in commercial bivalve aquaculture.
Nature Publishing Group
MetadataShow full item record
Willer, D., Furse, S., & Aldridge, D. (2020). Microencapsulated algal feeds as a sustainable replacement diet for broodstock in commercial bivalve aquaculture.. Scientific reports, 10 (1), 12577. https://doi.org/10.1038/s41598-020-69645-0
The global bivalve shellfish industry makes up 25% of aquaculture, is worth USD $17.2 billion yr-1, and relies upon a supply of juvenile bivalves produced by adult broodstock in hatcheries. Today large quantities of live algae are grown to feed broodstock at $220 kg-1, driving highly unsustainable energy and resource use. New advances in algal and microencapsulation technology provide solutions. We developed microencapsulated Schizochytrium algae diets, which can be produced sustainably at < $2 kg-1 from organic side-streams, and are shelf-stable to minimise waste. Physiological, histological, and cutting-edge metabolomic analyses demonstrate that in commercial settings sustainable microencapsulated diets facilitate improved sexual development and 12x greater omega-3 levels in oysters relative to conventional live algal diets. Every tonne bivalve protein produced instead of fish spares 9 ha, 67 tonnes CO2, and 40,000 litres freshwater. Further research into microencapsulated diets could support bivalve industry expansion, and contribute towards a step-change in sustainable global food production through improved aquaculture practices.
Embargo Lift Date
External DOI: https://doi.org/10.1038/s41598-020-69645-0
This record's URL: https://www.repository.cam.ac.uk/handle/1810/308109
Attribution 4.0 International (CC BY)
Licence URL: http://creativecommons.org/licenses/by/4.0/