ENVS 1000U Lecture Notes - Lecture 15: Marine Stewardship Council, Food Security, Pacific Halibut
10 Mar 2016
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Document Summary
About 68% of global marine fisheries are still sustainably fished. Number of overfished fisheries has increased 3-fold since 1970s. Major concern if these trends continue in future. Overfishing emptying the oceans: modern industrialized fishing practices are placing unprecedented pressure on marine resources, predicted that populations of all oceans species we fish for today will collapse by the year 2048. Modern fishing fleets deplete marine life rapidly: grand banks cod have been fished for centuries, catches more than doubled with immense industrial trawlers record-high catches lasted only 10 years. Fishing down the food chain : figures on total global catch do not relate the species, age, and size of fish harvested, as fishing increases, size and age of fish caught decline. 10-year-old cod, once common, are now rare: as species become too rare to fish, fleets target other species shifting from large, desirable species to smaller, less desirable ones. Lecture 15 entails catching species at lower trophic levels.
