https://www.sciencedaily.com/releases/2021/04/210427094803.htm

Researchers used a satellite vessel-tracking system to compare ship and boat traffic in January to June 2020 with the same period in 2019.

The study, led by the University of Exeter (UK) and involving the Balearic Islands Coastal Observing and Forecasting System and the Mediterranean Institute for Advanced Studies (both in Spain), found decreased movements in the waters off more than 70 per cent of countries.