I think fishing in arctic might be more significant- assuming that this professor's prediction is anywhere near accurate; and I wonder how many others would agree with his prediction

Apparently US lawmakers are inhibiting US fishing:
"The North Pacific Fishery Management Council, recognizing the importance of properly managing these emerging fisheries, proposed at its June meeting that the U.S. close all federal waters in the Arctic Ocean until a management regime is put in place. Senate Joint Resolution 17, authored by Stevens and Murkowski, is consistent with that effort."
http://www.alaskajournal.com/stories/102107/hom_20071021040.shtml

And considering that Russia has recently made wild claims about it's ownership of Arctic ocean, I doubt Russia is limiting it's fishing.
Perhaps a satellite to track fishing boats in the arctic and elsewhere might be a good idea. I believe I've seen satellite pictures which have shown fishing boat activity- but it's nighttime and uses the running lights of boats to detect them. Of course in the arctic circle during the fishing season, there would be no periods of nighttime.

Here's map showing ocean depth: