This approach may prove a good way of cutting the number of sharks and rays dying uselessly because they have been caught by lines set for other species
Save time by listening to our audio articles as you multitaskThe size of the world’s bycatch, as such unwanted captures are called, is hard to measure. The fishing industry is huge, and much activity is unreported, unregulated and sometimes illegal. But a pertinent study published last year inestimated that only half of the animals hooked by a longlining fleet in the Pacific Ocean near Palau were tuna . The rest were bycatch.
The team tested FishTek’s device in 2021 on two fishing boats in southern France. They put SharkGuards on half of the 900 hooks of each of 22 longlines deployed by these vessels, while leaving the other half as per normal. The hooks were sufficiently far apart on the lines that a device emitting a burst from one would not, they hoped, interfere with its neighbour. Then, once the lines had done their stuff, they analysed the resulting catches.The results were impressive.
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