EAS 1540 Lecture Notes - Lecture 23: Swordfish, Eutrophication, List Of Threatened Sharks
23 Dec 2016
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Bottom trawling: bottom of net weighed and dragged across seafloor; collects everything, not just what you want. 100km of fishing line and thousands of baited hooks. Fish aggregating devices (fads) - gear drifts at sea with satellite buoy for tracking, long long net going super far down to catch fish. Shifted from human scale farming to industrial scale fishing operations. 90% decline in the top predator fish abundance in the oceans. 82% of all the fisheries out there are at their limits or are overfishing. Increase of aquaculture which provides 46% of global fish production. Harmful: cheap fuel, funds for vessel construction, support for price of fish. Without fuel subsidy, trawling at the bottom of the ocean (which is v damaging) would probably stop. Harmful subsidies still remain, partly due to lobbying by vested groups. So many people rely on fish as their main source of protein.
