Thursday, July 30, 2009
Good news: world fisheries could avoid collapse by using new management tools in both developed and developing countries
Planet Ark reported that Dr. Boris Worm of Dalhousie University and colleagues are publishing a paper in Science that suggests world fisheries may avoid a total global collapse by using proven management tools in both the developed countries and the developing countries. This is notable because Dr. Worm had predicted total global collapse of fish and seafood populations by 2048. But, the effort will require rebuilding 63 percent of fish stocks worldwide and applying proven management tools not only to the ecosystems primarily affected by developed countries, but also those primarily affected by developing countries. These management tools include: restrictions on gear like nets so that smaller, younger fish can escape; limits on the total allowable catch; closing some areas to fishing; certifying fisheries as sustainable; offering shares of the total allowable catch to each person who fishes in a specified area. Researchers indicated that fishing limits must be set well below the maximum sustainable yield, which is the highest number of fish that can be caught in an area without hurting the species' ability to reproduce. Maximum sustainable yield should be an absolute upper limit, rather than a target that is frequently exceeded.
Worm's optimism was provisional, because the current research only looked at about one-quarter of the world's marine ecosystems, mostly in the developed world where data is plentiful and management can be more readily monitored and enforced. Of the 10 major ecosystems studied, scientists found five marine areas had cut the average percentage of fish they take, relative to estimates of the total number of fish. Two other ecosystems were never overexploited, leaving three areas overexploited. The fisheries in the study were the Iceland Shelf, Northeast U.S. Shelf, North Sea, Newfoundland-Labrador Shelf, Celtic-Biscay Shelf, Baltic Sea, Southern Australia Shelf, Eastern Bering Sea, California Current, and New Zealand Shelf.
Strict fisheries management in the developing world has put increasing pressure on fisheries controlled by developing countries, particularly African countries that struggle to provide food for their populations. To deploy effective fisheries management globally will require addressing the management capacity and governance problems of developing countries and reducing the poverty that makes effective management and governance so difficult.