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| Registros recuperados: 34 | |
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| Ibe, A.C.; Antia, E.E.. |
| Previous studies by various agencies have shown that widespread erosion is occurring on the Nigerian shoreline and in some places, the rate of shoreline retreat is so rapid as to be alarming. Shoreline stabilisation methods adopted for combating erosion along our coasts have been counter-productive and, in many cases, aggravated the problem largely because such solutions had been, and are being, carried out without consideration or understanding of fundamental principles of shoreline dynamics and processes. Following a review of case histories, the Nigerian Institute for Oceanography and Marine Research initiated in September, 1981 a data acquisition programme aimed at making a scientific input into long term and large scale coastal management planing in... |
| Tipo: Report |
Palavras-chave: Environmental protection; Shoreline erosion; Environmental protection; Http://aims.fao.org/aos/agrovoc/c_15898. |
| Ano: 1983 |
URL: http://hdl.handle.net/1834/1206 |
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| Mailu, A.M.. |
| The paper presents preliminary data collected in an assessment of the social, economic and environmental impacts of water hyacinth in the Lake Victoria Basin. A summary of the status of control and strategies for the future is given. The report draws on field observations made, studies through interviews of affected communities and organisations, personal communications and published reports by scientists in the region. Lake Victoria, the world’s second largest freshwater body, supports an estimated 25 million people living in the Basin, with an estimated gross economic product of US$3–4 billion annually, mainly from subsistence agriculture and fishing in Kenya, Uganda, Tanzania, and parts of Rwanda and Burundi. The multiple activities in the Lake Victoria... |
| Tipo: Proceedings Paper |
Palavras-chave: Environmental conditions; Environmental factors; Environmental impact; Environmental protection; Freshwater pollution; Resource management; Environmental factors; Environmental impact; Environmental conditions; Environmental protection; Resource management; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_15898; Http://aims.fao.org/aos/agrovoc/c_6524. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/1292 |
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| Linacre, Nicholas A.; Thompson, Colin J.. |
| The successful management of transgenic technology is likely to depend on the economic behavioral response of farmers to the regulated use of transgenic crops. A well-studied example is the widespread use of Bt-corn, in the United States, and elsewhere, to control the European Corn Borer, a major corn pest. The extensive use of Bt-corn has led to concerns about the emergence of insect resistance. The United States Environment Protection Agency addressed this potential problem by developing an insect resistance management strategy, based, in part, on complex mathematical models using detailed biological assumptions about the population genetics and life history of the European Corn Borer. However, seed companies and others have sometimes used simpler... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Insect resistance; Monte Carlo; Bt-corn; Logistic growth; Environmental risk; Biotechnology; Environmental protection; Crop Production/Industries. |
| Ano: 2005 |
URL: http://purl.umn.edu/59239 |
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| Lohr, Luanne; Park, Timothy A.; Higley, Leon. |
| Farmer's willingness to voluntarily reduce insecticide use is not considered when regulatory approaches to environmental protection are proposed. Regulations that require behavior that would voluntarily be undertaken are excessive and economically inefficient. Using survey data from a contingent valuation scenario, we demonstrate the willingness of crop producers in four Midwestern states in the U.S. to trade yield losses for environmental risk reduction by eliminating an insecticide application. The mean acceptable yield loss for a sample of 1,138 producers in Illinois, Iowa, Nebraska and Ohio is $8.25 per acre. Acceptable yield loss increases with the rated importance of environmental goods (fish, birds, mammals, native plants and endangered species),... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Decision models; Agriculture; Environmental protection; Risk; Contingent valuation; Crop Production/Industries; Environmental Economics and Policy; Resource /Energy Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/16671 |
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| Registros recuperados: 34 | |
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