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Registros recuperados: 58
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A Hedonic Analysis of Cattle Prices in the Central Corridor of West Africa: Implications for Production and Marketing Decisions AgEcon
Williams, Timothy O.; Okike, Iheanacho; Spycher, Ben.
Detailed weekly sales transactions data for the period January 2000-June 2001 from three frontier markets in the central corridor of West Africa were analyzed to identify the factors influencing short-run, intra-year cattle prices. The empirical results indicate that in addition to market location and seasonality of supply and sales, market participants show systemic preferences for specific cattle attributes (sex, weight, condition and finish) and are willing to pay premium prices consistent with their preferences. Communicating this information to producers can assist them to tailor their production and marketing decisions to meet market expectations and thereby improve their competitiveness, profitability and intra-regional livestock trade. Innovative...
Tipo: Conference Paper or Presentation Palavras-chave: Livestock markets; Hedonic price model; Market information; West Africa; Livestock Production/Industries; C21; D4; Q13; Q17.
Ano: 2006 URL: http://purl.umn.edu/25423
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A HEDONIC MODEL OF RICE TRAITS: ECONOMIC VALUES FROM FARMERS IN WEST AFRICA AgEcon
Dalton, Timothy J..
New crop varieties often have been promoted in developing countries based upon superior yield vis-a-vis locally available varieties. This research presents a hedonic model for upland rice by drawing upon the input characteristics and consumer good characteristics model literature. Model specification tests determine that a combination of production and consumption characteristics best explains the willingness to pay for new upland rice varieties. This non-separable household model specification determined that four traits explain the willingness to pay for new rice varieties: plant cycle length, plant height, grain elongation/swelling and tenderness. Yield was not significant explanatory variable for the willingness to pay for seed. The implications...
Tipo: Conference Paper or Presentation Palavras-chave: Hedonic; Upland rice; West Africa; Household modelling; Crop Production/Industries.
Ano: 2003 URL: http://purl.umn.edu/25804
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A new species of the operculate land snail genus Maizaniella from Liberia (Gastropoda, Caenogastropoda) Naturalis
Winter, A.J. de.
Maizaniella sapoensis spec. nov. from Liberia is described. The species is provisionally att ributed to the subgenus Spirulozania. It is by far the smallest known member of the genus, with an adult shell diameter of just over 2 mm.
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Maizaniidae; Maizaniella; Spirulozania; West Africa; Liberia; Sapo National Park; 42.73.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/311945
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A plot of one's own: gender relations and irrigated land allocation policies in Burkina Faso AgEcon
Zwarteveen, Margreet Z..
Discusses the potential opportunities and pitfalls of introducing market forces into the process of water allocation. Proposes several preconditions for beneficial privatization of water allocation and argues for a more sophisticated form of analysis than that generally allowed by proponents of basic needs or of free market approaches.
Tipo: Report Palavras-chave: Women in development; Gender; Land use; Land management; Policy; Female labor; Households; Irrigated farming; Social impact; West Africa; Burkina Faso; Dakiri; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Land Economics/Use; Political Economy; Productivity Analysis; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 1996 URL: http://purl.umn.edu/61114
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Agricultural Value Chain Development in West Africa – Methodological framework and case study of mango in Benin AgEcon
van Melle, Cathelijne; Coulibaly, Ousmane; Hell, Kerstin.
Globalization and competitiveness of agricultural commodities could have significant potential benefits for food security and poverty reduction in West Africa. Participation in global trade and economy is potentially important but not enough to ensure benefits at all levels of the chains and equitable distribution of income for each participant. Efficiency is key in the commodity value chain, but effective support functions and services, infrastructure, legal and policy environment are important. This paper presents the framework of value chain concept and analysis, as a guide to enhance competitiveness of commodities at national, regional or global level. The paper applies the value chain framework to a case study on mango in Benin, West Africa. The...
Tipo: Conference Paper or Presentation Palavras-chave: Benin; Mango; Value chain; West Africa; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; International Development; International Relations/Trade; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008 URL: http://purl.umn.edu/51994
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Approche méthodologique. Analyse de la compétitivité et l'évolution des avantages comparatifs dans la sous-région. AgEcon
Diallo, Boubacar Cisse; Crawford, Eric W.; Dembele, Niama Nango.
Tipo: Working or Discussion Paper Palavras-chave: Mali; Food security; Rice; Maize; West Africa; Competivity; Agricultural and Food Policy; Community/Rural/Urban Development; Demand and Price Analysis; Food Security and Poverty; International Development; International Relations/Trade; Q12; Q18; Q17; Q13.
Ano: 2009 URL: http://purl.umn.edu/58550
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ARE WEALTH TRANSFERS BIASED AGAINST GIRLS? GENDER DIFFERENCES IN LAND INHERITANCE AND SCHOOLING INVESTMENT IN GHANA'S WESTERN REGION AgEcon
Quisumbing, Agnes R.; Payongayong, Ellen M.; Otsuka, Keijiro.
This study attempts to analyze changing patterns of land transfers and schooling investments by gender over three generations in customary land areas of Ghana's Western Region. Although traditional matrilineal inheritance rules deny landownership rights to women, women have increasingly acquired land through gifts and other means, thereby reducing the gender gap in landownership. The gender gap in schooling has also declined significantly, though it persists. We attribute such changes to the increase in women's bargaining power due to an agricultural technology that increased the demand for women's labor, contributing to the reduction of "social" discrimination as well as weak "parental" discrimination.
Tipo: Working or Discussion Paper Palavras-chave: Property rights; Land inheritance; Agricultural growth; West Africa; Africa south of Sahara; Wealth transfers; Gender; Ghana; Education; Labor and Human Capital.
Ano: 2004 URL: http://purl.umn.edu/60311
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Assessing potential impact of avian influenza on poultry in West Africa: a spatial equilibrium model analysis AgEcon
You, Liangzhi; Diao, Xinshen.
In this paper, the authors analyze the potential economic impacts of avian influenza (AI) in West Africa, taking Nigeria as an example. They find that, depending on the size of the affected areas, the direct impact of the spread of AI along the two major migratory bird flyways would be the loss of about 4 percent of national chicken production. However, the indirect effect-consumers’ reluctance to consume poultry if AI is detected, causing a decline in chicken prices-is generally larger than the direct effect. The study estimates that Nigerian chicken production would fall by 21 percent and chicken farmers would lose US$250 million of revenue if the worst-case scenario occurred. The negative impact of AI would be unevenly distributed in the country, and...
Tipo: Report Palavras-chave: Avian influenza; Spatial equilibrium model simulation; West Africa; Nigeria; Livestock Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/55399
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Betting on cotton: Potential payoffs and economic risks of adopting transgenic cotton in West Africa AgEcon
Falck-Zepeda, Jose Benjamin; Horna, J. Daniela; Smale, Melinda.
Cotton is the largest source of export receipts in several West African nations where yields are declining and pesticide use is rising. Although there may be payoffs to introducing genetically modified Bt (Bacillus thurigiensis) cotton, limited information is available to predict its potential economic impact and there is uncertainty about its performance. Recognizing these constraints, we use an economic surplus model augmented with stochastic simulation to estimate ex ante the impact and distribution of benefits from Bt cotton. We consider the effects of adoption on both yields and abating crop damage, and offer scenarios depicting the policy options faced by West African stakeholders. The findings indicate that although the total net benefits of...
Tipo: Journal Article Palavras-chave: Crop biotechnology; Bt cotton; Economic surplus model; West Africa; Agricultural development; Risk; Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/56962
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Cashew cultivation in Guinea-Bissau – risks and challenges of the success of a cash crop Scientia Agricola
Catarino,Luís; Menezes,Yusufo; Sardinha,Raul.
In recent decades a boom in cashew (Anacardium occidentale)cultivation has taken place in Guinea-Bissau, leading to the replacement of traditional slash-and-burn agriculture by a cash crop. As a result, the country is currently one of the world’s largest producers of raw cashew nuts and the cashew sector has acquired enormous importance in Guinea-Bissau’s economy. Changes induced by the cashew boom at social and environmental levels are yet to be analyzed and understood. The present study provides an account of the process of cashew expansion in Guinea-Bissau, reviews the current situation and discusses its future prospects. The cashew tree was introduced into the country by the Portuguese in the XIXth century, but only effectively expanded in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: West Africa; Agroforestry systems; Cashew nut; Tree crops.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000500459
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Climate and pelagic fisheries in the Canary and Guinea currents 1964-1993: The role of trade winds and the southern oscillation ArchiMer
Binet, D.
Upwellings off the coasts of western Africa provide abundant but fluctuating marine resources. Sea surface temperature and wind stress, monitored by the ship-of-opportunity observation network, are compared to fishery statistics from 1964 onwards. In the Canary Current, off Sahara and Mauritania, upwellings are mostly wind driven. In the Guinea Current, off Cote d'Ivoire and Ghana, the link with local wind is very weak. In the southern Canary Current, two wind-intensification periods occurred in the early 1970s and from 1986 onwards. On each occasion, Sardina pilchardus landings were multiplied approximately threefold. During the first event, catches of species living at the periphery of the upwelling, Sardinella, Trachurus, Decapterus and Scomber,...
Tipo: Text Palavras-chave: Pelagic fisheries; West Africa; Trade winds; Oceanic currents; Southern Oscillation.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00093/20390/18057.pdf
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Climate Factors Play a Limited Role for Past Adaptation Strategies in West Africa Ecology and Society
Mertz, Ole; Department of Geography and Geology, University of Copenhagen; om@geo.ku.dk; Reenberg, Anette; Department of Geography and Geology, University of Copenhagen ; Ar@geo.ku.dk; Barbier, Bruno; International Cooperation Center for Agronomic Research and Development (CIRAD); bbarbier@cirad.fr; Dabi, Daniel; Department of Geography and Planning, Faculty of Environmental Sciences, University of Jos; davoo65@yahoo.com.
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptation; Climate variability; Livestock; Rainfed crops; West Africa.
Ano: 2010
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Climatic trends in continental shelf waters off Ghana and in the Gulf of Guinea, 1963-1992 ArchiMer
Koranteng, Ka; Mcglade, Jm.
Using time series analyses, some physical parameters of the continental shelf waters of the Gulf of Guinea were examined. Analysis of coastal sea surface temperatures from Ghana and Ivory Coast, and offshore sea surface temperatures from the Gulf of Guinea clearly shows spatial and inter-annual patterns of cooling in coastal waters of West Africa. The behaviour of the decomposed trend of coastal and offshore sea surface temperatures, sub-surface: temperature measured at 100 m depth off Ghana and salinity showed that the observational period (1963-1992) could be divided into three climatic periods: the period before 1972, from 1972 to 1982, and the period after 1982. In the first period, sea surface temperature at both coastal and offshore areas and bottom...
Tipo: Text Palavras-chave: Environnement marin; Afrique de l'Ouest; Séries temporelles; Marine environment; West Africa; Time series.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43363/42852.pdf
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Comparative analysis of trophic structure and interactions of two tropical lagoons ArchiMer
Villanueva, Ching-maria; Laleye, P; Albaret, J; Lae, Raymond; Tito De Morais, Luis; Moreau, J.
A comparative study of the Ebrie lagoon (Ivory Coast) and Lake Nokoue (Benin) was made based on ecotrophic model outputs that describe each system's structure and functioning. Two models were constructed using the Ecopath software to differentiate main biomass flows in the systems. Results indicate that biomasses and productions in both ecosystems are concentrated in trophic levels (TL) 2 and 3. Higher TL biomasses and productions in Lake Nokoue compared to Ebrie lagoon may be explained by the presence of acadjas. High production per biomass (P/B) and food consumption per biomass (Q/B) values indicate the high productivity of these systems and the abundance of juveniles in most groups which utilize these systems as refuge zones and nurseries. The...
Tipo: Text Palavras-chave: Ecopath; System maturity; Transfer efficiency; West Africa; Tropical lagoons.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2009.pdf
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Competition or cooperation in transboundary fish stocks management: Insight from a dynamical model ArchiMer
Nguyen-trong, Hieu; Brochier, Timothee; Auger, Pierre; Trinh, Viet Duoc; Brehmer, Patrice.
An idealized system of a shared fish stock associated with different exclusive economic zones (EEZ) is modelled. Parameters were estimated for the case of the small pelagic fisheries shared between Southern Morocco, Mauritania and the Senegambia. Two models of fishing effort distribution were explored. The first one considers independent national fisheries in each EEZ, with a cost per unit of fishing effort that depends on local fishery policy. The second one considers the case of a fully cooperative fishery performed by an international fleet freely moving across the borders. Both models are based on a set of six ordinary differential equations describing the time evolution of the fish biomass and the fishing effort. We take advantage of the two time...
Tipo: Text Palavras-chave: Shared fish stock; Aggregation of variables; ODE; Pelagic; Fisheries management; West Africa.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00442/55310/72108.pdf
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Complexity in trophic structure and stability in a modelled West African estuary ArchiMer
Villanueva, Ching-maria; Diouf, P.s.; Albaret, J.-j.; Moreau, J..
Un modèle Ecopath de l'estuaire du Sine-Saloum (Sénégal) comportant au total 37 groupes fonctionnels a été appliqué dans la présente étude en vue de déterminer les faits essentiels de ce système aquatique. La grande biodiversité spécifique des poissons de l'écosystème peut y jouer un rôle en assurant son intégrité, spécialement en présence de facteurs de stress, bien qu'il ait été observé que ce n'est pas entièrement le cas. Les résultats montrent qu'un autre facteur de mitigation est le niveau des forces d'interaction entre les groupes fonctionnels. La stabilité est accrue par des relations plus faibles et des pyramides plus courtes et plus larges. Bien que différentes questions se posent concernant les facteurs conduisant à la stabilité d'un système, les...
Tipo: Text Palavras-chave: Stabilité des systèmes; Sénégal; Omnivorie; Estuaire; Ecosystème côtier; Ecopath; Biodiversité; Afrique de l'Ouest; West Africa; System Stability; Senegal; Omnivory; Estuary; Ecopath; Coastal Ecosystem; Biodiversity.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-2554.pdf
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Conflicts, Rural Development and Food Security in West Africa AgEcon
Flores, Margarita.
This paper examines food security in the context of conflict in West Africa. The analysis developed in the paper recognises the importance of defining conflict type and the trends in conflict so that conflict and post-conflict policies may be implemented. The relationship between food security and conflict is analysed. Whilst conflict exacerbates food security, food insecurity can itself fuel conflict. Strategies designed to assist in post-war rehabilitation need to address key dimensions of food security: availability, access and stability. It is argued in this paper, that consideration of these three dimensions are necessary joint conditions in moving towards a reduction in the numbers of hungry. The cases of Sierra Leone and Liberia are examined to...
Tipo: Working or Discussion Paper Palavras-chave: West Africa; Conflict; Food Security; Crisis; Hunger; Food Security and Poverty; N47; N57; O13; O18.
Ano: 2004 URL: http://purl.umn.edu/23811
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Contrasted optimal environmental windows for both sardinella species in Senegalese waters ArchiMer
Diankha, Ousmane; Ba, Aliou; Brehmer, Patrice; Brochier, Timothee; Sow, Bamol Ali; Thiaw, Modou; Gaye, Amadou Thierno; Ngom, Fambaye; Demarcq, Herve.
We investigate Sardinella aurita and Sardinella maderensis recruitment success relative to the variability of oceanographic conditions in Senegalese waters using generalized additive models (GAM). Results show that recruitment of both species is marked by a strong intra-annual (seasonal) variation with minimum and maximum in winter and summer, respectively. Their interannual variations are synchronous until 2006 (recruitment decreasing), while from 2007 there is no synchrony. The model developed shows that sardinella recruitment variability is closely related to the tested environmental variables in the study area. However, the key environmental variables influencing the recruitment success are different for both species: the Coastal Upwelling Index and...
Tipo: Text Palavras-chave: Recruitment success; Sardinella aurita; Sardinella maderensis; Upwelling; West Africa.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00611/72299/71189.pdf
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Determination of the silvo-melliferous regions of Benin: a nationwide categorisation of the land based on melliferous plants suitable for timber production JARTS
Amakpe, Felicien; Akouehou, Gaston S.; de Graaf, Dirk C.; Sinsin, Brice.
Perennial plants are the main pollen and nectar sources for bees in the tropical areas where most of the annual flora are burned in dry seasons. Therefore perennial plants constitute the most reliable bio materials for determining and evaluating the beekeeping regions of the Republic of Benin. A silvo-melliferous region (S-MR) is a geographical area characterised by a particular set of homogenous melliferous plants that can produce timber. Using both the prevailing climatic and the agro-ecological conditions six S-MRs could be identified, i.e. the South region, the Common Central region, the Central West region, the Central North region, the Middle North region and the Extreme North region. At the country level, the melliferous plants were dominated by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroecology apiculture; Apis mellifera; Beekeeping potentiality; Forestry; Melliferous plants; Non-timber product; Tropical; Republic of Benin; West Africa.
Ano: 2015 URL: http://www.jarts.info/index.php/jarts/article/view/2015061048473
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Do U.S. Cotton Subsidies Affect Competing Exporters? An Analysis of Import Demand in China AgEcon
Muhammad, Andrew; McPhail, Lihong Lu; Kiawu, James.
We estimate the demand for imported cotton in China and assess the competitiveness of cotton-exporting countries. Given the assertion that developing countries are negatively affected by U.S. cotton subsidies, our focus is the price competition between the United States and competing exporters (Benin, Burkina Faso, Chad, Mali, India, and Uzbekistan). We further project how U.S. programs affect China’s imports by country. Results indicate that if U.S. subsidies make other exporting countries worse off, this effect is lessened when global prices respond accordingly. If subsidies are eliminated, China’s cotton imports may not fully recover from the temporary spike in global prices.
Tipo: Article Palavras-chave: China; Cotton; Import demand; Rotterdam model; Subsidies; United States; West Africa; International Relations/Trade; F17; Q11; Q17.
Ano: 2012 URL: http://purl.umn.edu/123786
Registros recuperados: 58
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