Squid fishing has rapidly increased in parts of the ocean with no or little oversight, leaving squid populations vulnerable to overfishing and collapse.
Fishing activity on the high seas is notoriously difficult to track, with thousands of vessels moving across a patchwork of international and national jurisdictions as vast as the oceans. “It’s very rare that you get a complete picture,” says Katherine Seto at the University of California, Santa Cruz.
To get a more complete view, Seto and her colleagues …