rare earth magnets repelling sharks and preventing attacks.
Having observed Great White Sharks for the last 10 years at Isla Guadalupe, I have a couple of questions. A lot of times a shark is initially repelled by something, but after the initial "flee" reaction and the realization that it is not something trying to attack it, the shark is actually attracted to it. I've observed many, specially young sharks, that are initially afraid of the shark cages, but after a while, come back and start investigating.
I'm not saying this is the case here, but it certainly needs to be investigated.
For me, the more interesting part in the article deals with the reduction of shark by-catch by the long line fishermen!
"We realized we could magnetize the fishing hook, and coat it with a
rare earth metal," he says. "It looks just like a regular hook. Several countries are now testing his so-called SMART hooks
to see if they work. Some tests show a 60 to 70 per cent reduction in
the number of sharks caught."
Here's the complete story.
If this research proves correct, I wonder if this would be cost effective. Would the long line fishermen actually buy those hooks? Food for thought.
Dive Operations Manager
Isla Guadalupe, Mexico
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