共查询到20条相似文献,搜索用时 0 毫秒
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Guzmán MG 《Science (New York, N.Y.)》2005,309(5740):1495-1497
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Bai C 《Science (New York, N.Y.)》2005,309(5731):61-63
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Couzin J 《Science (New York, N.Y.)》2007,315(5818):1518-1519
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Primavera JH 《Science (New York, N.Y.)》2005,310(5745):57-59
Aquaculture, the farming of shrimp and other useful aquatic and marine plants and animals in artificially confined and tended ponds, pens, and cages, ranks as a phenomenal success story in global food production. In 1975, aquaculture contributed 8% to the overall yield of the world's fish harvest; now it provides more than one-third of the yield. Total aquaculture production in 2003 was 54.8 million metric tons valued at 67.3 billion in U.S. dollars. More than 90% of this output comes from Asia, where aquaculture has its origins and where this month's essay author has lived and worked all of her life. In her essay, Jurgenne H. Primavera, senior scientist of the Aquaculture Department of the Southeast Asian Fisheries Development Center based in Iloilo, Central Philippines, traces the recent history of aquaculture and the socioeconomic and environmental challenges that its rapid growth has wrought, especially for the mangrove ecosystems in which much of brackishwater pond aquaculture occurs. With an eye on all stakeholders, Primavera lays out how aquaculture is now falling short of the goal of sustainability and what steps might be taken to move the industry in that direction. 相似文献
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Gewolb J 《Science (New York, N.Y.)》2001,293(5533):1237-1238
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Atmospheric science. Pinatubo,diffuse light,and the carbon cycle 总被引:1,自引:0,他引:1
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Perry D 《Science (New York, N.Y.)》2000,287(5457):1423
Millions of patients may benefit from the applications of stem cell research, although there is disagreement about whether public funds should be used to develop the science. Patients have been key to winning political support. Acting as advocates, they have contended that public investment will speed the research and bring accountability to biomedical technology. A political dispute about the new research, which holds the potential for cures to devastating diseases and to foster healthy aging, shows the need to respect public sensibilities and to court public approval, as well as the importance of involving patients in debates where the methods of biomedical discoveries and ethical beliefs collide. 相似文献
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Hunten DM 《Science (New York, N.Y.)》2001,294(5548):1843-1844
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Holden C 《Science (New York, N.Y.)》1972,176(4039):1106-1108
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