From phys.org, August 6, 2020
New research reveals it’s possible to detect sharks moving into an area without actually seeing any of them. All that’s needed is a couple liters of water.
Florida International University (FIU) marine scientists Demian Chapman, Bautisse Postaire, and Judith Bakker—along with a collaborative team of researchers from New College of Florida and Havenworth Coastal Conservation—wanted to see if a spring and summer influx of blacktip sharks (Carcharhinus limbatus) into Florida’s Terra Ceia Bay could be detected by filtering and extracting eDNA from water samples.
Read more here.