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| Musango, J.K.; Peter, C.. |
| Evaluating the range of proposed adaptation measures to combat the sensitivity of agriculture to climate change effects involves evaluating complex interactions between human and natural systems. Integrated strategy-making and implementation in the agricultural sector to reduce the risks posed by climate change requires the consideration of multiple, interdisciplinary factors and the sensitivities of their inter-relationships. Lack of information on the sensitivity of agricultural activities to climate change in Africa hampers climate change adaptation research on the region. In water scarce South Africa, the growth of the agricultural sector is threatened by projected decreases in water availability due to climate change. This paper shows how Bayesian... |
| Tipo: Journal Article |
Palavras-chave: Climate change adaptation; Water utilization; Bayesian approach; Environmental Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/10121 |
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| Kasteridis, Panagiotis P.; Munkin, Murat K.; Yen, Steven T.. |
| This study analyzes the demand for cigarettes fitting observed zero outcomes with a trivariate model consisting of an equation for the starting smoking decision, an equation for the quitting decision, and an equation that models the level of cigarettes consumed. Five competing specifications are considered to explain level, with the ordered probit, which accommodates pile-ups of counts in the dependent variable, providing the best fit. Marginal effects of explanatory variables are calculated providing strong evidence of race and gender differences in consumption patterns. The estimated marginal effects are robust to alternative categorizations of the level of cigarettes. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Demand and Price Analysis. |
| Ano: 2007 |
URL: http://purl.umn.edu/9862 |
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| Davanso, Rosemary Cristina Souza; Unesp Botucatu; Henry, Raoul; Unesp Botucatu. |
| O presente trabalho teve como objetivo principal verificar a biodiversidade bentônica em áreas do fundo da lagoa do Coqueiral, zona de desembocadura do rio Paranapanema, na represa de Jurumirim, Estado de São Paulo. Foram selecionados dezoito pontos de amostragem, englobando áreas rasas e áreas profundas. As coletas foram feitas em intervalos trimestrais ao longo de um ano; também foram analisadas as variáveis físicas e químicas da água (nível, transparência, temperatura, oxigênio dissolvido, pH e condutividade elétrica). Amostras do sedimento, para análise da fauna e de fatores abióticos (granulometria e conteúdo orgânico), foram recolhidas em tréplicas, utilizando como coletor a draga de Petersen. O material foi triado e analisado sob microscópio... |
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Palavras-chave: 2.05.00.00-9 Ecologia biodiversidade; Bentônica; Lagoa do Coqueiral; Rio Paranapanema; São Paulo. |
| Ano: 2007 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/166 |
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| Crowe, Bronwyn; White, Benedict. |
| Conservation and restoration of native vegetation is often a gradual process which may require many years to transform an ecosystem from one vegetative state to a target ecosystem. This process is stochastic, with some changes potentially irreversible. In contrast, contracts with landholders to undertake conservation measures on their property are typically for less than ten years and often make no contingencies for re-contracting at the end of the contract period. The risk to land holders and conservation agencies of contracts not being renewed and the consequent potential loss of previous investment means including covenants in conservation contracts may be attractive to both parties. A model is developed to empirically examine the optimal dynamic... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: POMDP; Biodiversity; Contracts; Monitoring; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/9457 |
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| Le Bris, Nadine. |
| Although occupied submersibles have played an essential role in the discovery and study of hydrothermal ecosystems at depths ranging from 15003500 m, operational constraints at great depths have meant that the wide chemical and thermal diversity of the hydrothermal environments have long remained poorly defi ned. In the last decade, use of remotely operated vehicles (ROVs) to substantially extend dive time and development of a new set of dedicated instruments have greatly expanded our capacity to characterize seafl oor hydrothermal habitats at the interface between hydrothermal fl uid and seawater. In particular, major breakthroughs in the fi eld of in situ chemical sensing and highpressure experimentation have led to a much better understanding of the... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-6388.pdf |
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| CHIARI, L.; RESENDE, R. M. S.; JANK, L.; VALLE, C. B. do; JUNGMANN, L.. |
| Neste trabalho procurou-se apresentar e discutir, de forma ampla, o uso da biotecnologia e seu potencial para os programas de melhoramento de forrageiras tropicais realizados na Embrapa Gado de Corte. O uso da biotecnologia nesses programas é uma atividade recente, mas importantes resultados vêm sendo gerados a fim de auxiliar o processo de obtenção de novas cultivares forrageiras. A maioria dos trabalhos apresentados utiliza marcadores Random Amplification of Polymorphic DNA (RAPD) para aplicações em curto prazo: estudos de diversidade em acessos de bancos de germoplasma, identificação de híbridos e estimação da taxa de cruzamento. Aplicações em médio e longo prazos do uso de marcadores, como mapeamento genético e seleção auxiliada por marcadores... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Forrageira tropcial; RAPD.; Biotecnologia; Gramínea; Hibrido; Leguminosa; Marcador Molecular; Melhoramento Genético Vegetal; Pastagem.. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/326872 |
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| Gitahy,Patrícia de Medeiros; Souza,Marlene Teixeira de; Monnerat,Rose Gomes; Arrigoni,Enrico de Beni; Baldani,José Ivo. |
| The control of the major sugarcane pest, Diatraea saccharalis, is limited by the stem location of the caterpillar. As part of a long-term project towards the development of an alternative and efficient delivery system of Cry proteins to control the sugarcane borer, the current work describes the selection and characterization of a Brazilian B. thuringiensis strain with prominent activity towards D. saccharalis. Strain S76 was eleven-fold more active than the HD-1 Lepidoptera-standard strain, as estimated by the LC50 of 13.06 µg/L and 143.88 µg/L, respectively. We observed bipiramidal and cuboidal crystals similar to those found in other B. thuringiensis strains with entomopathogenic activity against Lepidoptera and Diptera. In addition, smaller and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Bacillus thuringiensis kurstaki; Cry toxins; Spherical crystal; Diatraea saccharalis. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300028 |
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| Bella, Giovanni. |
| A model of different species competing for the same environment is presented, and possible explanations of peaceful coexistence or rather internecine conflicts are consequently derived. By means of a Lotka-Volterra dynamic system we describe the evolution of two populations (bees and locusts) that differently approach the management of those natural resources they contend for, and thus make a simple parable of todays societies playing the current environmental scenario. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/10269 |
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| Lima, Marcelo Simao; Didonet, Simone. |
| Considering that the concepts of dynamic production system and traditional system are placed in opposite sides of a continuum, the critical factor for the companies is in finding the break-even point desired to maximize the results and to reduce costs. The aim of this paper is to verify the situation of the manufacturing company when using characteristics of both flexible production system and static system to keep a good level of service and to reduce operational costs. The qualitative research was based on a case study of a great nourishing branch company. The results shows that the company is located inside of continuum considered, thus getting a satisfactory balance between the corresponding level of service to the customer and operational costs. It... |
| Tipo: Journal Article |
Palavras-chave: Productive systems; MRP; Just in time.. |
| Ano: 2007 |
URL: http://purl.umn.edu/43696 |
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| Hollosy, Zsolt. |
| Megállapítható, hogy Magyarország Európa kukoricatermelésében jelentős szerepet játszik, annak ellenére is, hogy az 1980-as évek közepétől nem tart lépést a hazai termésátlagok növekedése az EU-15 tagállamának átlagával. A búza jelentősége kisebb, itt a leszakadás az 1990-es évek elején kezdődött. A termésát-lagok jelentősen ingadoznak. A termelés meghatározó régiói: Észak- és Dél-Alföld, Dél-Dunántúl. A fedezeti termésátlag évről évre növekedett. A vizsgált időszakban a búzát a fő régiókban támogatások nélkül is sikerült – jellemzően a 26 AK-nál jobb minőségű földeken – nyereségesen termelni. A búzatermelés egé-szére igaz, hogy a vizsgált területek mindegyikén eredménnyel termelhető, a mel-léktermék költségcsökkentő, valamint a támogatások jövedelemnövelő... |
| Tipo: Journal Article |
Palavras-chave: EU; Régió; Búza; Kukorica; Fedezeti termésátlag; EU; Region; Wheat; Corn; Collateral production average; Agribusiness; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/57691 |
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| ARAUJO, A. M. de. |
| Nas grandes regiões mundiais de semi-árido, a produção de alimento é uma atividade difícil e restrita ao acesso à água ao longo do ano. A pecuária de pequenos ruminantes assume um caráter de social importante para a população destas áreas, garantindo oferta de carne para consumo e renda ao longo do ano. Na região Semi-Árida do Piauí, é comum encontrar rebanhos de caprinos e ovinos nômades, que são criados secularmente sem intervenção tecnológica, mas de uma maneira extremamente sustentável na caatinga. |
| Tipo: Separatas |
Palavras-chave: Caprino; Raça. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/66398 |
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| Rodríguez,N.M.; Campos,W.E.; Lachica,M.L.; Borges,I.; Gonçalves,L.C.; Borges,A.L.C.C.; Saliba,E.O.S.. |
| An indirect calorimetry system for rapid determination of CO2 and CH4 production and O2 consumption to estimate heat production of animals was built at Escola de Veterinária da Universidade Federal de Minas Gerais, Brazil. Procedures for determination of correction and calibration factors for gas analyzers and the whole system, using standard test gases were described. In addition, a metabolic trial was performed to evaluate heat production of lambs fed ad libitum. It is concluded that the system is suitable for heat production determinations in small and medium size animals. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calibration; Open circuit; Respirometry. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000200033 |
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| Nicholas J. Gales; Phillip J. Clapham; C. Scott Baker. |
| During the austral summer of 2007/08, hunting of Southern Hemisphere (SH) humpback whales will recommence after almost half a century of protection. The stated rationale for this hunt, by the Government of Japan (GoJ), is to gather important scientific information for use in management. If the scientific need were defensible, and the proponents had accommodated reasonable conservation concerns, then criticisms of the hunt would be limited to philosophical issues. This is not the case. The program’s research objectives are unlikely to be achieved by lethal methods and do not address the principal research needs for SH humpback whales identified by the International Whaling Commission (IWC). |
| Tipo: Manuscript |
Palavras-chave: Earth & Environment. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1313/version/1 |
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| Registros recuperados: 16.191 | |
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