May 21, 2020
Research shows novel feeds can boost aquaculture production
UC Santa Barbara, the University of Tasmania and the International Atomic Agency researchers found that using novel feeds based on microalgae, insect protein and oils can increase aquaculture production without affecting marine ecosystems, Phys.org reported.
Lead author for the study Richard Cottrell said wild fish catch has been the same for 40 years, but aquaculture production has improved over the same time frame.
Out of the 29 million tonnes of forage fish caught globally (herrings, sardines and anchovies), 16 million is used for aquaculture feed. This new research found that other kind of fish feed should be used to meet growing demand.
These novel feeds, based on microalgae, insect protein and oils, could partially subsitutute normal fishmeal and oil in many fish species without negatively affecting the fish's feed efficiency or omega-3 profiles.
Cottrell said tilapias and carps respond well to the novel fishmeal feeds, while salmon still requires fish-based feeds to maintain growth and support metabolism.
He added that new nutrition and manufacturing technologies can improve these novel feeds and reduce demand for wild caught fishmeal. The study analysed 264 scientific farmed fish feeding experiments.
The study has been published in the journal Nature Food.