July 20, 2017 โ British startup SafetyNet Technologies is using light to develop a potential new solution to one of the fishing industryโs biggest problems: bycatch. Bycatchโthe fish, turtles, seabirds, dolphins, and other types of marine life that end up caught in fishing nets and then discardedโhas both environmental and economic consequences. It damages marine ecosystems and adds cost to the fishing industry. According to Oceana, around 20 percent of the catch in United States fisheries is thought to be of unintended species. Worldwide, it could be as much as 40 percent.
SafetyNet recently developed PISCES, a light-emitting device that fits existing nets and helps fishermen target certain species. It is based on the theory that fish vary in their reactions to light, with different types of light attracting some species and repulsing others. It is designed to be flexible and comes in different shapes and sizes to accommodate a variety of equipment. PISCES is also programmable, allowing the user to choose specifications such as the type of light, its intensity, and the flash rate.
Other solutions for bycatch, such as turtle excluder devices or the Nordmore grate, tend to involve gear adapted to particular fishing environments. These devices either physically prevent certain non-target species from entering nets or allow them to easily escape. Unlike these solutions, PISCES does not focus on a specific species. Light has been shown to affect a range of fish and crustaceans, as well as turtles and birds, and the planned trials for PISCES are spread across diverse fishing environments.
SafetyNet conducted an initial trial of PISCES in 2016 in partnership with Youngโs Seafood and Cefas. The tests were based in the North Sea and showed that light could reduce bycatch by up to 60 percent. Recent trials in shrimp by scientists with the Oregon Department of Fish and Wildlife have shown that light can reduce bycatch by as much as 90 percent.