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Registros recuperados: 24
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A new Argocoffeopsis (Coffeeae, Rubiaceae) from southern Cameroon: Argocoffeopsis spathulata Naturalis
Davis, A.P.; Sonké, B..
A new species of Argocoffeopsis, A. spathulata, is described as new to science. A description, line drawing, distribution map and conservation assessment are provided.
Tipo: Article / Letter to the editor Palavras-chave: Coffeeae; Argocoffeopsis; Cameroon; Plant conservation; IUCN.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/524467
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A new species of Afrothismia (Burmanniaceae; tribe: Thismieae) from the western foothills of Mount Cameroon Naturalis
Franke, Th.; Sainge, M.N.; Agerer, R..
Afrothismia foertheriana, a new species of Burmanniaceae (tribe: Thismieae) from the peripheral zone of the Onge Forest Reserve in Cameroon’s Southwest Province is described and illustrated. The papillose, multicellular floral trichomes, the tepal’s erose margins, the small, zygomorphic perianth mouth and the dull purplish brown coloration give A. foertheriana a distinctive appearance within the genus. The species is here assessed as being critically endangered.
Tipo: Article / Letter to the editor Palavras-chave: Burmanniaceae; Thismieae; Afrothismia foertheriana; Cameroon; Conservation; Taxonomy.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/524860
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A synopsis of Mendoncia (Acanthaceae) in continental Africa including the description of two new species from western Central Africa and a new subspecies from West Africa Naturalis
Breteler, F.J.; Wieringa, J.J..
The amphi-atlantic genus Mendoncia of the Acanthaceae counts c. 80 species. In tropical Africa it is represented by 14 species, eight in continental Africa and six in Madagascar. The remaining species occur in tropical America. The new species Mendoncia camerounensis and M. rabiensis are described and illustrated. Mendoncia floribunda is resurrected, fully described, and illustrated as well. Mendoncia iodioides, reduced to a variety of M. phytocrenoides in the Flore du Gabon, is restored as a distinct species. The isolated western population of Mendoncia gilgiana is recognised as a new subspecies. The conservation status of all species is assessed. Only a few of them are classified as Least Concern, the others as ranging from Critically Endangered to...
Tipo: Article / Letter to the editor Palavras-chave: Cameroon; Gabon; Key; Mendoncia; New species; New subspecies; Taxonomy.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/655988
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Agent Behavior under Risky and Uncertain Conditions. An Empirical Verification of Irving Fisher’s Notion of Time Preference AgEcon
Balgah, Roland Azibo; Buchenrieder, Gertrud.
Irving Fisher's theory on time preference in the 1930s arguably influenced the analysis of agents' current behavior with respect to future outcomes. By suggesting linear discount rates implying rational and self-interested motives of agents, Fisher substantiated neoclassical economic thinking. However, Fisher's notion of time preference, the choice between present and future enjoyment that actually integrates a psychological discounting component has not received similar attention in the scholarly literature. This paper aims at closing this gap. It empirically examines agent behavior under uncertain conditions culminating from natural shocks, and differentiates the psychic from the physical component. To empirically test Fisher's notion of time preference,...
Tipo: Conference Paper or Presentation Palavras-chave: Risks; Uncertainty; Agent behavior; Fisher; Time preference; Cameroon; Risk and Uncertainty.
Ano: 2011 URL: http://purl.umn.edu/114214
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Avaliacao agronomica de capim-elefante (Pennisetum purpureum cvs. Cameroon e Anao) sob tres frequencias de corte. Infoteca-e
COSTA, N. de L..
O ensaio foi conduzido no campo experimental da UEPAE Porto Velho, da EMBRAPA, durante o periodo de marco/1987 a novembro/1988. O delineamento experimental utilizado foi em blocos casualizados com tres repeticoes. Os tratamentos consistiram de duas cultivares de capim-elefante (Cameroon e Ana) e tres frequencias de corte (28, 42 e 56 dias). As parcelas mediam 4,0 x 4,0 m tendo uma area util de 4,0 m2. Resultados permitiram concluir que o aumento do intervalo entre corte, em ambas as cvs. de capim-elefante implicou em maiores rendimentos de MS e PB, contudo, provocou decrescimos significativos nos teores de PB. As duas cultivares de capim-elefante apresentaram desempenho agronomico semelhante, exceto para cortes a cada 28 dias, onde a cv. Ana foi superior a...
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Pastagem; Graminea forrageira; Capim elefante; Pennisetum purpureum; Cameroon; Ana; Brasil; Rondonia; Presidente Medice; Pasture; Forage grasses; Brazil.
Ano: 1990 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/698052
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Can commercialization of NTFPs alleviate poverty? A case study of Ricinodendron heudelotii (Baill.) Pierre ex Pax. kernel marketing in Cameroon JARTS
Cosyns, Hannes; Degrande, Ann; De Wulf, Robert; Van Damme, Patrick; Tchoundjeu, Zac.
Ricinodendron heudelotii (Baill.) Pierre ex Pax. kernel (njansang) commercialization has been promoted by the World Agroforestry Centre (ICRAF) in project villages in Cameroon with the aim to alleviate poverty for small-scale farmers. We evaluated to what extent development interventions improved the financial situation of households by comparing project and control households. The financial importance of njansang to household livelihoods between 2005 and 2010 was investigated through semi-structured questionnaires with retrospective questions, focus group discussions, interviews and wealth-ranking exercises. The importance of njansang increased strongly in the entire study region and the increase was significantly larger in project households. Moreover,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural economics; Forestry economics NTFP; Ricinodendron heudelotii; Commercialization; Commercialization; Rural development; Income; Cameroon.
Ano: 2012 URL: http://www.jarts.info/index.php/jarts/article/view/2011101139365
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Costigulella primennilus spec. nov., a new minute western African terrestrial snail, with remarks on the genus Costigulella (Gastropoda Pulmonata: Streptaxidae) Naturalis
Winter, A.J. de.
Costigulella primennilus spec. nov. is the first representative of Costigulella reported from Cameroon. It is probably the smallest species of the family Streptaxidae known world-wide. Arguments are provided to consider Costigulella an independent radiation and genus, rather than a subgenus of Gulella. The mode of development of apertural barriers in juvenile shells in Costigulella and in other Streptaxidae is discussed.
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Gulella; Costigulella; New status; New species; Distribution; Africa; Cameroon; Shell development; Apertural barriers; 42.73.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/261785
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Effects of Natural Shocks on Risk Behavior. Experimental Evidence from Cameroon AgEcon
Balgah, Roland Azibo; Buchenrieder, Gertrud.
Increasing occurrence of devastating natural shocks has stimulated research interest in the economics of natural disasters. Much of this scholarly work concentrates on effects of shocks on poverty, risk and vulnerability, and very little on understanding the effects of natural shocks on risk behavior. Referring to a 25 year-old disaster, we use unique survey data and experiment results from two disaster affected communities in rural Cameroon to test two hypotheses: (1) Natural shocks affect long term risk behavior; and (2) self-relocation into risk-prone areas is an explicit demonstration of risk taking. The results reveal differentiated risk behavior in self-relocated and state-resettled households, with the former taking higher risks compared to...
Tipo: Conference Paper or Presentation Palavras-chave: Shocks; Risk behavior; Experiment; Cameroon; Risk and Uncertainty.
Ano: 2011 URL: http://purl.umn.edu/114215
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Evolution of urban chicken consumption in Southern countries: a comparison between Haiti and Cameroon AgEcon
Laroche Dupraz, Catherine; Awono, Cyprien.
Since the beginning of 2000s, in order to let poor people accede to meat consumption, several developing countries have opened their domestic chicken market to foreign imports, by reducing import tariffs. Thus local chicken meat competes with frozen pieces of chicken imported from the European Union or America, causing the loss of many jobs in the local chicken food chain. In order to highlight the determinants of urban consumer’s choice relative to chicken types, and assess the opportunity for local chicken to restore its market share, investigations have been done in 2005 and 2006, in Yaoundé (Cameroon) and at Port-au-Prince (Haiti) applied to 180 urban households in each country. While imported frozen pieces of chicken have almost entirely substituted...
Tipo: Conference Paper or Presentation Palavras-chave: Chicken; Urban consumption; Developing countries; Globalisation; Cameroon; Haiti.; Food Consumption/Nutrition/Food Safety.
Ano: 2008 URL: http://purl.umn.edu/43938
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Hypolytrum unispicatum (Cyperaceae), a new species from Cameroon Naturalis
Sosef, M.S.M.; Simpson, D.A..
A new species of Hypolytrum (Cyperaceae), H. unispicatum Sosef & D.A. Simpson, from southern Cameroon is described and illustrated. Some remarks on its ecology and related species are given.
Tipo: Article / Letter to the editor Palavras-chave: Cyperaceae; Hypolytrum; Africa; Cameroon; Taxonomy.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/525420
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Impacts of Type of Fallow and Invasion by Chromolaena odorata on Weed Communities in Crop Fields in Cameroon Ecology and Society
Ngobo, Martine; IITA; m.ngobo@cgiar.org; McDonald, Morag; University of Wales, Bangor; mamcd@bangor.ac.uk; Weise, Stephan; ; s.weise@cgiar.org.
In the humid forest regions of southern Cameroon in central Africa, sectoral and macroeconomic policy reforms introduced in the late 1980s have led to intensified land use, which in turn has resulted in, among other environmental consequences, shortened fallow systems dominated by the Asteraceae shrub, Chromolaena odorata (L.) King and Robinson, rather than by secondary forest species. A trial was established to determine the effect of shortened fallow duration and invasion by C. odorata on the weed flora in subsequent mixed food cropping systems. Plots were established in cleared 5- to 7-year-old fallow fields in which the vegetation was either dominated by C. odorata or not, and in which the dominant fallow vegetation in the previous...
Tipo: Peer-Reviewed Reports Palavras-chave: CVA; Cameroon; Chromolaena odorata; Fallow; Weeds.
Ano: 2004
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Landscape-scale Approaches for Integrated Natural Resource Management in Tropical Forest Landscapes Ecology and Society
Frost, Peter; Center for International Forestry Research; p.frost@cgiar.org; Campbell, Bruce; Center for International Forestry Research; bruce.campbell@cdu.edu.au; Medina, Gabriel; Center for International Forestry Research; gabriel.medina@waldbau.uni freiburg.de; Usongo, Leonard; World Wide Fund for Nature; lusongo@wwfcarpo.org.
Integrated natural resource management (INRM) helps resource users, managers, and others to manage resources sustainably by considering, reconciling, and synergizing their various interests and activities. Although many social and environmental problems have to be tackled at a range of scales to be resolved successfully, INRM has particular relevance at the landscape level at which the interests of local people first intersect those of the outside world. We propose eight guidelines for building successful INRM programs: focus on multiscale analysis and intervention; develop partnerships and engage in action research; facilitate change rather than dictating it; promote visioning and the development of scenarios; recognize the importance of local knowledge;...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Action research; Brazil; Cameroon; Collaboration; Extractive reserves; Integrated natural resource management; Kalimantan; Multiscale analysis; Multiple stakeholders; Tropical forest landscapes.
Ano: 2006
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Management Conflicts in Cameroonian Community Forests Ecology and Society
Cameroonian community forests were designed and implemented to meet the general objectives of forest management decentralization for democratic and community management. The spread of management conflicts all over the country has shown that these broad expectations have not been met. We describe conflicts occurring in 20 community forests by types of actors and processes involved. We argue that a number of external (community vs. external actors) and internal (intra-community) conflicts are part of the causes blocking the expected outcome of Cameroonian community forests, fostering bad governance and loss of confidence. Rent appropriation and control of forest resources appear as systemic or generalized conflicts. While community forest support projects...
Tipo: Peer-Reviewed Reports Palavras-chave: Cameroon; Common pool resources management; Community forests; Network analysis; Social conflicts.
Ano: 2011
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Notes on Micractaeon, a monotypic genus of African land snails (Gastropoda Pulmonata: Ferussaciidae?) Naturalis
Bruggen, A.C. van; Winter, A.J. de.
Micractaeon kakamegaensis Verdcourt, 1993 (type loc. Kenya, Kakamega Forest), is a synonym of Pseudopeas koptawelilense Germain, 1934 (type loc. Kenya, Mt. Elgon); the proper name is therefore Micractaeon koptawelilensis (Germain, 1934). New anatomical data are supplied, more or less confirming classification in the family Ferussaciidae. The shell is subject to some considerable variation in size, shape and sculpture. The species appears to be widely distributed in various types of forest in tropical Africa (Ghana, Cameroon, eastern and south-eastern Zaïre, Kenya, Malawi, and eastern Zambia); hypsometrical distribution is generally from c. 950 m to c. 2300 m, although in Ghana it has been collected at altitudes of between < 250 and c. 700 m.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Ferussaciidae; Micractaeon; Africa; Ghana; Cameroon; Zaïre; Kenya; Zambia; Mala?i; Taxonomy; Distribution; 42.73.
Ano: 1995 URL: http://www.repository.naturalis.nl/record/319133
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Produção de forragem de capim-elefante sob clima frio: curva de crescimento e valor nutritivo R. Bras. Zootec.
Dall'Agnol,Miguel; Scheffer-Basso,Simone Meredith; Nascimento,João Antonio L. do; Silveira,Carlos A. M.; Fischer,Ricardo G..
Objetivou-se quantificar a produção e o valor nutritivo do capim-elefante (cv. Cameroon), em Lages, Santa Catarina, identificando possíveis limitações à sua utilização e demonstrando sua viabilidade na região. O ensaio foi conduzido entre 1982 e 1985, no qual o capim-elefante foi estabelecido em parcelas, dispostas em delineamento de blocos ao acaso. Os tratamentos constaram da soma dos dias de crescimento até o momento dos cortes, a fim de se estabelecer a curva de crescimento. A produção de massa seca (MS) acumulada foi avaliada a partir do 42º dia após o corte de uniformização, sendo que as parcelas foram cortadas em seqüência, a cada 21 dias, até completarem 210 dias de crescimento, respeitando-se um resíduo de 50 cm. A capacidade de rebrotação dentro...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cameroon; DIVMS; Proteína.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982004000500002
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Redefinition of Thapsia Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora) Naturalis
Winter, A.J. de.
As presently used, the helicarionoid genus Thapsia Albers, 1860 embraces a large, heterogeneous assemblage of species. As a first step in the revision of this group of taxa, the genus Thapsia (type species Helix troglodytes Morelet, 1848) is redefined anatomically and conchologically. In the absence of alcohol-preserved material of T. troglodytes, Thapsia ebimimbangana spec. nov. from Cameroon and T. wieringai spec. nov. from Gabon are described to characterize the soft parts morphology of Thapsia. Three new genera are introduced, viz. Saphtia gen. nov. (type species S. granulosa spec. nov.), Pseudosaphtia gen. nov. (type species P. brunnea spec. nov.) and Vanmolia gen. nov. (type species Thapsia sjoestedti d’Ailly, 1896). A second species of Saphtia, S....
Tipo: Article / Letter to the editor Palavras-chave: Cameroon; Côte d'Ivoire; Gabon; Africa; Gastropoda; Taxonomy; Land snails; Helicarionoidea; Thapsia; Saphtia; Pseudosaphtia; Vanmolia; Urocyclidae; 42.73.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/273964
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SOCIOECONOMIC AND INSTITUTIONAL DETERMINERS OF DURABLE TECHNOLOGICAL INNOVATIONS IN THE FOOD-PRODUCING AGRICULTURE OF CAMEROON AgEcon
Temple, Ludovic; Kwa, Moise; Bikoi, Achile.
The challenges posed by food security for populations in sub-Saharan Africa and the fact that extensive production systems are reaching their limits in food-producing agriculture imply accelerating technological innovation toward ecological intensification of agricultural production systems. A review of research on plantain banana in Cameroon since 1988 revealed how institutional innovation enabled hybridization of different forms of research (fundamental, systems, and action research) and reinforced the organizational innovation required for technical change. Evaluation of impacts underlined the complementarity between an increase in productivity and in income in rural areas, the production of human and social capital and the protection of forest resources.
Tipo: Conference Paper or Presentation Palavras-chave: Innovation; Food crops; Cameroon; Sustainable development; Plantain; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007 URL: http://purl.umn.edu/7938
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Sustainable Forest Management in Cameroon Needs More than Approved Forest Management Plans Ecology and Society
Cerutti, Paolo Omar; Center for International Forestry Research (CIFOR), Bogor, Indonesia; p.cerutti@cgiar.org; Nasi, Robert; Center for International Forestry Research (CIFOR), Bogor, Indonesia; r.nasi@cgiar.org; Tacconi, Luca; Crawford School of Economics and Government, The Australian National University; luca.tacconi@anu.edu.au.
One of the main objectives of the 1994 Cameroonian forestry law is to improve the management of production forests by including minimum safeguards for sustainability into compulsory forest management plans. As of 2007, about 3.5 million hectares (60%) of the productive forests are harvested following the prescriptions of 49 approved management plans. The development and implementation of these forest management plans has been interpreted by several international organizations as long awaited evidence that sustainable management is applied to production forests in Cameroon. Recent reviews of some plans have concluded, however, that their quality was inadequate. This paper aims at taking these few analyses further by assessing the actual impacts that...
Tipo: Peer-Reviewed Insight Palavras-chave: Cameroon; Certification; Law enforcement; Sustainable forest management.
Ano: 2008
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Sweet, Sticky, and Sustainable Social Business Ecology and Society
Ingram, Verina; Centre for International Forestry Research; University of Amsterdam, The Netherlands; v.ingram@cgiar.org.
Tipo: Peer-Reviewed article Palavras-chave: Apiculture; Cameroon; Nontimber forest products (NTFPs); Poverty; Value chain.
Ano: 2011
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Targeting of and outreach to the poor by rural development nonprofit organizations in Cameroon AgEcon
Balgah, Roland Azibo; Buchenrieder, Gertrud.
The importance of nonprofit organizations such as rural development organizations, farmers associations and common initiative groups as drivers of change in rural areas has been generally recognized in the economics of nonprofit organizations. While the economic theories attempt to explain the formation and functioning of nonprofit organizations, the targeting and outreach performance of these organizations has received little attention and at best is empirically divergent. Using the example of a nonprofit rural development organization in North West Cameroon, this paper analyzes the relative poverty of beneficiaries and non beneficiaries of its small scale fish farming program as a proxy for targeting efficiency. Poverty is measured through multiple...
Tipo: Working or Discussion Paper Palavras-chave: Nonprofit organizations; Targeting; Poverty; Cameroon; Community/Rural/Urban Development; Food Security and Poverty; L31; I30; O18.
Ano: 2010 URL: http://purl.umn.edu/93079
Registros recuperados: 24
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