Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 11
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Additions to the revision of the genus Hemistephanus Enderlein (Hymenoptera: Stephanidae), with inclusion of four taxa and description of two new species Pap. Avulsos de Zool. (São Paulo)
Aguiar,Alexandre Pires.
Four additional species are included in the genus Hemistephanus: H. villosus (Kieffer) comb. n. and H. colombiensis (Ceballos) comb. n., transferred from Megischus and redescribed, and H. costaricensis sp. n. and H. stenogulatus sp. n., described as new; H. artiosulcatus Aguiar is proposed as a junior synonym of H. villosus Kieffer. The males of H. arctatus, H. colombiensis, H. submaculatus, and H. villosus are described for the first time. Much new or additional morphometric data is incorporated and discussed for these species and for H. carinatus, H. erugatus, H. erythrocephalus, H. limpidipennis, H. orfilanus, H. ruficeps, and H. velutinus. New geographical records are presented for all mentioned species and for H. cylindricus. Errata for publications...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biometry; Key; Megischus; Neotropical; Central America.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492004000200001
Imagem não selecionada

Imprime registro no formato completo
Can the Private Sector be Competitive and Contribute to Development through Sustainable Agricultural Business? A Case Study of Coffee in Latin America AgEcon
Kilian, Bernard; Pratt, Lawrence; Jones, Connie; Villalobos, Andres.
Latin America's coffee market continues in economic crisis. Sustainable coffee production and certification is one option for economic recuperation and social and environmental sustainability for the region's coffee producers. This paper explores four viable certification processes (Organic, Fair Trade, Rainforest Alliance, and Utz Kapeh) by first defining their requirements. Then, an assessment of microeconomic impacts is given, where the production processes of sustainable and conventional coffee are evaluated and compared. Finally, the paper presents their future relevance and entrepreneurial potential by considering long-term market perspectives. Information about sustainable production in Latin America was gathered through primary sources in...
Tipo: Journal Article Palavras-chave: Sustainable coffee; Certification; Economics; Central America; Agribusiness.
Ano: 2004 URL: http://purl.umn.edu/8149
Imagem não selecionada

Imprime registro no formato completo
Circumscription and nomenclature of Hiraea barclayana, H. reclinata, and H. ternifolia (Malpighiaceae), and of seven species misassigned to them Naturalis
Anderson, C..
A review of collections from Mexico to northern South America that had been primarily determined as H. barclayana, H. reclinata, and H. ternifolia, or synonyms, showed them to include ten species. Misinterpretations were caused by superficial morphological similarities and traditional nomenclatural errors. The species now recognized include six previously described: H. barclayana, H. hookeriana (formerly included in H. reclinata), H. reclinata, H. sanctae-marthae, H. ternifolia, and H. transiens. Four new species are proposed: H. mcvaughii, H. silvicola, and H. venezuelana; H. trianae was previously recognized at varietal level and is elevated to species. A neotype is chosen for H. reclinata. Lectotypes are designated for H. velutina (= H. barclayana) and...
Tipo: Article / Letter to the editor Palavras-chave: Central America; Colombia; Hiraea; Malpighiaceae; Mexico; Venezuela.
Ano: 2016 URL: http://www.repository.naturalis.nl/record/613731
Imagem não selecionada

Imprime registro no formato completo
Do Farmers Benefit from Participating in Specialty Markets and Cooperatives? The Case of Coffee Marketing in Costa Rica AgEcon
Wollni, Meike; Zeller, Manfred.
Historically low prices in the conventional coffee market have caused financial and social hardship among coffee farmers. In the face of this crisis, specialty markets have attracted the attention of the international donor community. These market segments have shown consistent growth over the last decade and exhibit price premiums in international markets. Therefore, if higher prices are passed on to farmers, access to specialty markets could help to alleviate the crisis brought on by low prices in the conventional sector. The present study attempts to identify the factors that determine farmers' participation in specialized markets and whether participation in these markets leads to higher prices for farmers. A two-stage model is used to analyze farmers'...
Tipo: Conference Paper or Presentation Palavras-chave: Central America; Costa Rica; Coffee; Specialty markets; Cooperatives; Agribusiness; Marketing; Q13; L1.
Ano: 2006 URL: http://purl.umn.edu/25670
Imagem não selecionada

Imprime registro no formato completo
Edge-drilling behavior in the predatory gastropod Notocochlis unifasciata (Lamarck, 1822) (Caenogastropoda, Naticidae) from the Pacific coast of Panama: taxonomic and biogeographical implications Naturalis
Rojas, Alexis; Hendy, Austin; Dietl, Gergory P..
We conducted a laboratory study to determine drillhole siteselectivity patterns in the predatory behavior of Notocochlis unifasciata (Lamarck, 1822), which is a common naticid gastropod on the eastern Pacific coast of Central America, preying on two infaunal venerid bivalves – the thin-shelled and weakly ornamented Leukoma grata (Say, 1831) and the thick-shelled and strongly ornamented Iliochione subrugosa (Wood, 1828). Spatial patterns of drillhole distribution indicate strong preferences for drilling the umbonal region and the ventral edge of the shell, with the proportion of edge- to wall-drilling attacks increasing in thicker, strongly ornamented prey that were larger than their predator’s own size. Drilling patterns from museum and beach...
Tipo: Article / Letter to the editor Palavras-chave: Biological interactions; Drilling predation; Central America.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/588034
Imagem não selecionada

Imprime registro no formato completo
Farmer Organization, Collective Action and Market Access in Meso-America AgEcon
Hellin, Jonathan; Lundy, Mark; Meijer, Madelon.
The global agricultural economy is changing. Commodity prices are declining, and producers increasingly supply complex value chains. There is growing interest in how farmers can benefit from emerging market opportunities. Farmers are encouraged to produce high value crops and engage in value-adding activities such as agro-processing. Farmer organization and collective action are often seen as key factors in enhancing farmers’ access to markets. Often too little attention is directed at a) the most appropriate types of organization, b) whether the public and/or private sector is best placed to support their formation, and c) the conditions necessary for ensuring their economic viability. This paper reports on research in Mexico and Central America that...
Tipo: Journal Article Palavras-chave: Smallholder farmers; Maize; High value agricultural products; Mexico; Central America; Business development services; Value chains; Pro-poor growth; Agribusiness.
Ano: 2007 URL: http://purl.umn.edu/47907
Imagem não selecionada

Imprime registro no formato completo
FIRST RECORD OF THE GENUS Ocyochterus FROM COLOMBIA AND NEW RECORDS OF OCHTERIDAE FROM COSTA RICA (HEMIPTERA:HETEROPTERA) Acta biol.Colomb.
HERRERA MADRIGAL,Federico.
The first Colombian record of Ocyochterus, expanding the previously known distributional range of the genus. Additionally, records of two species of Ochterus from Costa Rica are provided. The material examined is deposited at the Zoological Museum of the University of Costa Rica (MZUCR), San José, Costa Rica.
Tipo: Journal article Palavras-chave: Nepomorpha; Heteroptera; Central America; Colombia; Velvety shore bugs.
Ano: 2015 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000200024
Imagem não selecionada

Imprime registro no formato completo
Revision of Hydroides Gunnerus, 1768 (Polychaeta: Serpulidae) from the Eastern Pacific region and Hawaii Naturalis
Bastida-Zavala, J. Rolando; Hove, Harry A. ten.
A taxonomic revision of the Hydroides species (Polychaeta: Serpulidae) from the Eastern Pacific Ocean is presented. Twentyone taxa are described, of which two are widespread (H. diramphus Mörch, 1863 and H. elegans (Haswell, 1883)) and four are Amphiamerican (H. alatalateralis (Jones, 1962), H. gairacensis Augener, 1934, H. salazarvallejoi Bastida-Zavala & Ten Hove, 2003, and H. sanctaecrucis Kroyer [in] Mörch, 1863). Three species are new to science: Hydroides deleoni n. sp., H. panamensis n. sp. and H. trompi n. sp. Morphometric comparisons between H. brachyacanthus Rioja, 1941, H. deleoni n. sp., and H. similis (Treadwell, 1929), between H. chilensis Hartmann-Schröder, 1962, H. cruciger Mörch, 1863 and H. panamensis n. sp., and between H....
Tipo: Article / Letter to the editor Palavras-chave: Central America; Gulf of California; Key; New species; Serpulinae; Standard diagnosis.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/505009
Imagem não selecionada

Imprime registro no formato completo
Soil conservation and technical efficiency among hillside farmers in Central America: a switching regression model AgEcon
Solis, Daniel; Bravo-Ureta, Boris E.; Quiroga, Ricardo E..
The main objective of this paper is to evaluate and analyse technical efficiency (TE) levels for hillside farmers under different levels of adoption of soil conservation in El Salvador and Honduras. A switching regression model is implemented to examine potential selectivity bias for high and low level adopters, and separate stochastic production frontiers, corrected for selectivity bias, are estimated for each group. The main results indicate that households with above-average adoption show statistically higher average TE than those with lower adoption. Households with higher adoption have smaller farms and display the highest partial output elasticity for land. Constraints in the land and credit markets are likely explanations for these differences. In...
Tipo: Article Palavras-chave: Central America; Soil conservation; Stochastic frontiers; Switching regression; Technical efficiency; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/118529
Imagem não selecionada

Imprime registro no formato completo
Technical Efficiency and Adoption of Soil Conservation in El Salvador and Honduras AgEcon
Solis, Daniel; Bravo-Ureta, Boris E.; Quiroga, Ricardo E..
A household-level switching regression model is implemented to examine potential selectivity bias for rural households under high and low levels of investments in soil conservation in El Salvador and Honduras. In the presence of selectivity bias, separate stochastic production frontiers are estimated for low and high adopters. The main results indicate that households with higher levels of investments in soil conservation show higher average TE than those with a lower level of investments. Constrains in the rural land and credit markets are likely explanations for these differences. The results also indicate that for farms with lower levels of investments in soil conservation access to credit is a significant factor explaining the sources of inefficiency....
Tipo: Conference Paper or Presentation Palavras-chave: Stochastic Frontiers; Technical Efficiency; Switching Regression; Central America; Soil Conservation; Land Economics/Use; D24; Q12; O13; C21.
Ano: 2006 URL: http://purl.umn.edu/25784
Imagem não selecionada

Imprime registro no formato completo
The Impact of the Central America Free Trade Agreement on the Central American Textile Maquila Industry AgEcon
Jansen, Hans G.P.; Morley, Samuel A.; Kessler, Gloria; Pineiro, Valeria; Sanchez, Marco V.; Torero, Maximo.
While the Central America Free Trade Agreement (CAFTA) remains a hotly debated issue in all five Central American countries that are part of the treaty, most discussions are based on preconceived opinions rather than grounded in research-based results. The point of departure of the paper is that the provisions in the agreement concerning the textile maquila industry are likely to have a significant impact on household welfare, despite the already existing preferential access of textile maquila exports to the U.S. market under the rules of origin set by the Caribbean Basin Initiative (CBI) and the U.S.–Caribbean Basin Trade Partnership Act (CBTPA). What CAFTA does for maquila production in Central America is to make permanent and expand the liberalized...
Tipo: Working or Discussion Paper Palavras-chave: Apparel industry; CAFTA; Central America; CGE model; Maquila; International Relations/Trade.
Ano: 2007 URL: http://purl.umn.edu/42393
Registros recuperados: 11
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional