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| Registros recuperados: 33 | |
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| Streck,Nereu Augusto. |
| The amount of carbon dioxide (CO2) of the Earth´s atmosphere is increasing, which has the potential of increasing greenhouse effect and air temperature in the future. Plants respond to environment CO2 and temperature. Therefore, climate change may affect agriculture. The purpose of this paper was to review the literature about the impact of a possible increase in atmospheric CO2 concentration and temperature on crop growth, development, and yield. Increasing CO2 concentration increases crop yield once the substrate for photosynthesis and the gradient of CO2 concentration between atmosphere and leaf increase. C3 plants will benefit more than C4 plants at elevated CO2. However, if global warming will take place, an increase in temperature may offset the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Global warming; Photosynthesis; Agriculture; Food supply. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000300041 |
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| Шульман, Г. Е.; Никольский, В. Н.; Юнева, Т. В.; Щепкина, А. М.; Бат, Л.; Кидейш, А. Е.. |
| Рассмотрена многолетняя динамика содержания жира у шпрота и анчоуса Чёрного моря как индикаторов обеспеченности пищей в связи с температурой воды, концентрацией фитопланктона, величинами запасов и уловов этих рыб. Глобальным климатическим фактором, оказывающим прямое и косвенное влияние на обеспеченность мелких пелагических рыб Чёрного моря пищей, является температура. Региональные факторы, воздействующие на состояние шпрота и анчоуса, – пищевая конкуренция, речной сток и загрязнение водной среды. |
| Tipo: Journal Contribution |
Palavras-chave: Шпрот; Анчоус; Содержание жира; Обеспеченность пищей; Температура; Конкуренция; Фитопланктон; Запасы и уловы; Чёрное море; Sprat; Anchovy; Fat content; Food supply; Temperature; Competition; Phytoplankton; Stocks and yields; Black Sea; Камса; Вміст жиру; Забезпеченість їжею; Конкуренція; Фітопланктон; Вилови; Чорне море. |
| Ano: 2007 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/854 |
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| Seguineau, Catherine; Soudant, P; Moal, Jeanne; Delaporte, Maryse; Miner, Philippe; Quere, Claudie; Samain, Jean-francois. |
| The present study tested two techniques for dietary supplementation of Crassostrea gigas spat with PUFA, such as arachidonic acid (AA). The first technique consisted of a preliminary enrichment and growth of an algal concentrate (T-ISO, Isochrysis sp.) with AA dissolved in an ethanol solution, the whole culture then being fed to the spat. This enrichment increased the AA weight percentage in T-ISO neutral and polar lipids from 0.6 to 22.4% and from 0.4 to 6.8%, respectively. The second delivery technique was direct addition separately of free AA dissolved in ethanol solution and algal concentrate (T-ISO + AA) to the spat-rearing tank. To test the efficiency of these delivery techniques, oyster spat were supplemented with AA-enriched T-ISO, T-ISO + AA, and... |
| Tipo: Text |
Palavras-chave: Food supply; Arachidonic acid; Spat; Crassostrea gigas; Dietary. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1094.pdf |
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| Blanchet, Aline; Dubois, Stanislas; Hily, Christian; Rochette, Sebastien; Le Goaster, Edouard; Guillou, Monique. |
| Mixed beds of Ophiocomina nigra and Ophiothrix fragilis (Echinodermata, Ophiuroidea) are usually predominated by O. fragilis and are reported to be stable over time. The Bay of Brest (Brittany, France) is a highly productive ecosystem where both species co-occur in the main central part. Using a geostatistical approach, we tested for changes in O. nigra and O. fragilis density and total biomass patterns between 1987 and 2011. Our results highlighted an increase in O. nigra population size and the induction of a spatial shift of the co-occurring O. fragilis. O. nigra increased similar to 5 times in density and covered almost all the study area, while its density-dependent biomass increased similar to 3 times (22 t km(-2), ash-free dry mass) between 1987 and... |
| Tipo: Text |
Palavras-chave: Echinoderm; Ophiocomina nigra; Ophiothrix fragilis; Food supply; Kriging method; Suspension-feeder. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00090/20136/17782.pdf |
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| Koester, Ulrich. |
| Success in ensuring a continuous, adequate supply of food is one of the most important bases on which governments of low-income countries are judged by their people. This is because downward fluctuations in food supplies wreak great privation on low-income people and redistribute real income away from them. In view of this, the International Food Trade and Food Security Program at the International Food Policy Research Institute (IFPRI) has undertaken a series of studies of food supply management in developing countries. Among the policies considered have been schemes to compensate for fluctuations in food production and supply and in foreign exchange availability at the national, regional, and international levels. IFPRI's studies of food management... |
| Tipo: Report |
Palavras-chave: Food supply; Southern Africa; Tanzania; Economic integration; Food Security and Poverty. |
| Ano: 1986 |
URL: http://purl.umn.edu/42175 |
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| Simatupang, Pantjar; Fleming, Euan M.. |
| This proceedings is a record of a regional workshop on "Food Security in the Southwest Pacific Island Countries", convened to discuss the findings and strategies achieved in a two-year research project "Food Security Strategies for Selected South Pacific Island Countries". The national experts of the participating countries: Fiji, Papua New Guinea, Tonga and Vanuatu, presented reports of their country studies and the commentators from each country provided additional information. |
| Tipo: Report |
Palavras-chave: Food supply; Food security; Food Security and Poverty. |
| Ano: 2001 |
URL: http://purl.umn.edu/32711 |
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| Nkonya, Ephraim M.; Pender, John L.; Jagger, Pamela; Sserunkuuma, Dick; Kaizzi, Crammer; Ssali, Henry. |
| Poverty reduction is one of the overarching objectives of most of Sub-Saharan Africa and other low-income countries. Accordingly, one of IFPRI’s major research themes focuses on policies and strategies for poverty reduction. This research report contributes knowledge to that theme. It also contributes to IFPRI’s ongoing investigation of policies and strategies that foster broad-based and environmentally sustainable agricultural and rural development. In Uganda, where soil erosion and depletion of soil nutrients are widespread, land degradation is a major cause of declining productivity and increasing poverty. In this study, Ephraim Nkonya and his colleagues measure the relative merits of various household income strategies and land management practices in... |
| Tipo: Report |
Palavras-chave: Land use; Government policy; Uganda; Food supply; Poor; Nutrition; Agriculture and state; Land capability for agriculture; Data processing; Food Security and Poverty; Land Economics/Use. |
| Ano: 2004 |
URL: http://purl.umn.edu/37897 |
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| Gebremedhin, Tesfa G.. |
| Although world food and agricultural production, based on current trends, will be sufficient to meet demand in the decades ahead, the world still faces a serious food crisis, at least as perilous and life-threatening for millions of poor people as those of the past. To this end, the main objective of this paper is to illuminate the world food situation and to provide a critical analysis of the core causes of world food insecurity by identifying the various misconceptions surrounding our understanding of hunger, starvation, and poverty. A clear and deeper awareness of the real causes of hunger and malnutrition in poor countries is imperative to enable and challenge policy makers and planners to lay the groundwork at the grass-roots level for appropriate... |
| Tipo: Journal Article |
Palavras-chave: Food distribution; Food security; Food supply; Hunger; Malnutrition; Poverty; Food Security and Poverty. |
| Ano: 2000 |
URL: http://purl.umn.edu/14663 |
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| Smith, Lisa C.; Alderman, Harold; Aduayom, Dede. |
| Reducing food insecurity in the developing world continues to be a major public policy challenge, and one that is complicated by lack of information on the location, severity, and causes of food insecurity. Such information is needed to properly target assistance, evaluate whether progress is achieved, and develop appropriate interventions to help those in need. This research report explores a new method of measuring food insecurity using food data collected as part of household expenditure surveys. Such surveys are routinely undertaken by numerous national governments throughout the developing world, but in the past the resulting food data remained largely unexploited for the purposes of measuring food insecurity. Using data from 12 Sub-Saharan African... |
| Tipo: Report |
Palavras-chave: Food supply; Africa; Sub-Saharan; Food Security and Poverty. |
| Ano: 2006 |
URL: http://purl.umn.edu/37885 |
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| von Braun, Joachim; Hotchkiss, David; Immink, Maarten. |
| Modernization of traditional agriculture entalls increased participation of the smallholder sector in the exchange economy. The achievement of this participation requires an open trade regime, domestic policies that ensure against market failures and public policy that effectively permits use of a new production technology for sustained growth. To open up these opportunities to small farmers, investment in rural intrastate is essential, as is investment in education that will enable these farmers to participate as entrepreneurs in the growth process must stimulate employment and increased returns to land. Nontraditional vegetables for export have a higher labor content and therefore promise to help foster rural modernization. In this study of... |
| Tipo: Report |
Palavras-chave: Vegetable trade; Guatemala; Exports; Small Farms; Food supply; Agricultural laborers; Household surveys; Crop Production/Industries. |
| Ano: 1989 |
URL: http://purl.umn.edu/42169 |
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| Sauer, Timm; Havlik, Petr; Schneider, Uwe A.; Kindermann, Georg E.; Obersteiner, Michael. |
| Fertile land and fresh water constitute two of the most fundamental resources for food production. These resources are affected by environmental, political, economic, and technical developments. Regional impacts may transmit to the world through increased trade. With a global forest and agricultural sector model, we quantify the impacts of increased demand for food due to population growth and economic development on potential land and water use. In particular, we investigate producer adaptation regarding crop and irrigation choice, agricultural market adjustments, and changes in the values of land and water. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Irrigation; Food supply; Integrated assessment; Water use intensity; Agricultural adaptation; Land scarcity; Partial equilibrium model; Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/44271 |
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| Holden, Stein T.; Shiferaw, Bekele A.; Pender, John L.. |
| Soil fertility and the lack of fertilizer use in Africa are frequently discussed topics. The problems of land degradation and low agricultural productivity, which result in food insecurity and poverty, are particularly severe in the rural highlands of Ethiopia. In many areas, a downward spiral of land degradation and poverty appears to be occurring. Finding solutions to these problems requires identifying effective entry points for farmers, governments, and civil society organizations, and understanding the potential impacts and tradeoffs that are likely to arise from alternative interventions. This report seeks to improve that understanding, using a bioeconomic model of land management and agricultural production developed for a community that is fairly... |
| Tipo: Report |
Palavras-chave: Agriculture; Economic aspects; Ethiopia; Food supply; Sustainable agriculture; Sustainable development; Government policy; Food Security and Poverty; Land Economics/Use. |
| Ano: 2005 |
URL: http://purl.umn.edu/37890 |
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| Registros recuperados: 33 | |
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