SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

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.

A new species of Afrothismia (Burmanniaceae; tribe: Thismieae) from the western foothills of Mount Cameroon

Palavras-chave: Coffeeae; Argocoffeopsis; Cameroon; Plant conservation; IUCN.

Ano: 2008

URL: http://www.repository.naturalis.nl/record/524467

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.

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

Palavras-chave: Burmanniaceae; Thismieae; Afrothismia foertheriana; Cameroon; Conservation; Taxonomy.

Ano: 2004

URL: http://www.repository.naturalis.nl/record/524860

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...

Agent Behavior under Risky and Uncertain Conditions. An Empirical Verification of Irving Fisher’s Notion of Time Preference

Palavras-chave: Cameroon; Gabon; Key; Mendoncia; New species; New subspecies; Taxonomy.

Ano: 2018

URL: http://www.repository.naturalis.nl/record/655988

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,...

Costigulella primennilus spec. nov., a new minute western African terrestrial snail, with remarks on the genus Costigulella (Gastropoda Pulmonata: Streptaxidae)

Palavras-chave: Risks; Uncertainty; Agent behavior; Fisher; Time preference; Cameroon; Risk and Uncertainty.

Ano: 2011

URL: http://purl.umn.edu/114214

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.

Effects of Natural Shocks on Risk Behavior. Experimental Evidence from Cameroon

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

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...

Evolution of urban chicken consumption in Southern countries: a comparison between Haiti and Cameroon

Palavras-chave: Shocks; Risk behavior; Experiment; Cameroon; Risk and Uncertainty.

Ano: 2011

URL: http://purl.umn.edu/114215

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...

Hypolytrum unispicatum (Cyperaceae), a new species from Cameroon

Palavras-chave: Chicken; Urban consumption; Developing countries; Globalisation; Cameroon; Haiti.; Food Consumption/Nutrition/Food Safety.

Ano: 2008

URL: http://purl.umn.edu/43938

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.

Impacts of Type of Fallow and Invasion by Chromolaena odorata on Weed Communities in Crop Fields in Cameroon

Palavras-chave: Cyperaceae; Hypolytrum; Africa; Cameroon; Taxonomy.

Ano: 2005

URL: http://www.repository.naturalis.nl/record/525420

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

Landscape-scale Approaches for Integrated Natural Resource Management in Tropical Forest Landscapes

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

Management Conflicts in Cameroonian Community Forests

Notes on Micractaeon, a monotypic genus of African land snails (Gastropoda Pulmonata: Ferussaciidae?)

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

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.

Produção de forragem de capim-elefante sob clima frio: curva de crescimento e valor nutritivo

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

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

Redefinition of Thapsia Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora)

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....

SOCIOECONOMIC AND INSTITUTIONAL DETERMINERS OF DURABLE TECHNOLOGICAL INNOVATIONS IN THE FOOD-PRODUCING AGRICULTURE OF CAMEROON

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

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.

Sustainable Forest Management in Cameroon Needs More than Approved Forest Management Plans

Palavras-chave: Innovation; Food crops; Cameroon; Sustainable development; Plantain; Research and Development/Tech Change/Emerging Technologies.

Ano: 2007

URL: http://purl.umn.edu/7938

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

Sweet, Sticky, and Sustainable Social Business

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

Targeting of and outreach to the poor by rural development nonprofit organizations in Cameroon

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

Three new species of Craterispermum (Rubiaceae) from the Lower Guinea Domain

Taedoumg, H.; Hamon, P..

Three species of Craterispermum are described from Cameroon, Equatorial Guinea and Gabon. Detailed descriptions and distribution maps are provided for each species, their conservation status is assessed and their taxonomic affinities are discussed. An identification key for the Craterispermum species present in Cameroon, Equatorial Guinea and Gabon is given.

Traditional Knowledge Systems and the Conservation of Cross River Gorillas: a Case Study of Bechati, Fossimondi, Besali, Cameroon

Palavras-chave: Cameroon; Craterispermum; C. deblockianum; C. rumpianum; C. sonkeanum; Equatorial Guinea; Gabon; Rubiaceae.

Ano: 2012

URL: http://www.repository.naturalis.nl/record/525559