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Tool locates the best fishing spots while avoiding turtles

A new software tool can help fishers locate the most productive fishing spots while avoiding unwanted or protected species such as sea turtles and dolphins.

Worldwide, fishing fleets discard as many as two of every five sea creatures they catch. The new system, called EcoCast, combines satellite data of ocean conditions, records from fisheries observers, and species tracking data to pinpoint ideal fishing areas on a daily basis.

Resource managers can adjust the weighting of each species as risks change and the fishing season progresses. This helps fishers optimize their harvest of target fish, while reducing the risk of inadvertently catching and killing sensitive species.

fishing boat
Gillnet fishing boats ply the California coast. A dynamic management tool can be up to 10 times more efficient for protecting species than previous management styles. (Credit: Craig Heberer via Stanford)

A new study, which appears in Science Advances, shows that this type of dynamic management tool and approach can be up to 10 times more efficient for protecting species than previous management styles.

“EcoCast is leading the way toward more dynamic management of marine resources,” says coauthor Larry Crowder, professor of marine ecology and conservation at Stanford University’s Hopkins Marine Station. “We’re putting the information directly in the hands of the fishers and managers.”

Fisheries managers currently protect species by creating static areas that fishers must avoid.

However, these protected areas don’t reflect the dynamic nature of life in the ocean, where protected fish and other creatures regularly migrate out of the no-fishing zones and into fishers’ nets.

“Fishers will be willing to try this because they’re always looking for ways to do things differently, and better,” says Gary Burke, a drift gillnet fisherman in southern California who collaborated on the research. “It’s not going to be perfect, because it’s a prediction, but it is giving us access to information we haven’t had before.”

See an almost real-time map of global fishing

EcoCast doesn’t just provide fishers with better information. It also informs scientists, resource managers, and researchers working with big data to advance more sustainable fisheries practices.

“By pioneering a way of evaluating both conservation objectives and economic profitability for sustainable US fisheries, we’re simultaneously advancing both conservation and economic objectives,” says lead author Elliott Hazen, a visiting scholar at the Stanford Woods Institute for the Environment.

Badly timed fishing seasons mess with fish

“We’ve had to settle for static management in the past,” Crowder says. “Now, we can consider this novel approach to address one of the most significant barriers to global fisheries sustainability.”

Researchers from San Diego State University; the University of California, Santa Cruz; the University of the Sunshine Coast; Old Dominion University; the University of Maryland; and Moss Landing Marine Lab are coauthors. NASA, California Sea Grant, and the National Oceanic and Atmospheric Administration funded the work.

Source: Nicole Kravec for Stanford University

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