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      Preserving deep-sea natural heritage: Emerging issues in offshore conservation and management

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      Biological Conservation

      Elsevier BV

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          Collapse and conservation of shark populations in the Northwest Atlantic.

          Overexploitation threatens the future of many large vertebrates. In the ocean, tunas and sea turtles are current conservation concerns because of this intense pressure. The status of most shark species, in contrast, remains uncertain. Using the largest data set in the Northwest Atlantic, we show rapid large declines in large coastal and oceanic shark populations. Scalloped hammerhead, white, and thresher sharks are each estimated to have declined by over 75% in the past 15 years. Closed-area models highlight priority areas for shark conservation, and the need to consider effort reallocation and site selection if marine reserves are to benefit multiple threatened species.
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            Economic reasons for conserving wild nature.

            On the eve of the World Summit on Sustainable Development, it is timely to assess progress over the 10 years since its predecessor in Rio de Janeiro. Loss and degradation of remaining natural habitats has continued largely unabated. However, evidence has been accumulating that such systems generate marked economic benefits, which the available data suggest exceed those obtained from continued habitat conversion. We estimate that the overall benefit:cost ratio of an effective global program for the conservation of remaining wild nature is at least 100:1.
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              Evidence for the seasonal deposition of detritus to the deep-sea floor and its subsequent resuspension

               R.S. Lampitt (1985)
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                Author and article information

                Journal
                Biological Conservation
                Biological Conservation
                Elsevier BV
                00063207
                September 2007
                September 2007
                : 138
                : 3-4
                : 299-312
                Article
                10.1016/j.biocon.2007.05.011
                © 2007

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