Ocean Deoxyfish – Ocean deoxygenation effects on threatened top predators: New understanding and predictions from novel bio-logging instruments and data

The reduction in dissolved oxygen levels in the world's oceans is causing permanent oxygen minimum zones (OMZ) to expand. This affects the distribution and abundance of top predators, which become concentrated as their habitat is reduced and are thus more vulnerable to fisheries. The EU-funded OCEAN DEOXYFISH project will increase our understanding of OMZ impacts on oceanic ecology by studying animal movement and developing new biologging technologies and in situ physiology to measure oxygen tolerances and metabolism directly in free-living fish. Results will reveal the impacts of future warming and OMZ on fish niches as well as their influence on distribution and on capture risk by fisheries.