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| Registros recuperados: 152 | |
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| McMahan,Caleb D.; Matamoros,Wilfredo A.; Elías,Diego J.; Piller,Kyle R.. |
| ABSTRACT Pacific and Atlantic-slope rivers of the Isthmus of Tehuantepec in Mexico contain two cichlid species of the genus Vieja relevant to the current study, V. zonata and V. coatlicue, respectively. The Atlantic-slope species was initially considered a population of uncertain taxonomic status and recently described as a distinct species based on three putatively diagnostic morphological characters. The objective of this study was to combine new and existing genetic data, along with reanalysis of morphological characters, to test the distinctiveness of V. coatlicue. Little genetic variability and no geographic structuring were recovered. Additionally, putatively diagnostic morphological character states were present across both species, failing to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cichlid; Freshwater; Mexico; River; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200204 |
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| Hinojosa-Garro,Demián; Arceo-Gómez,Joselito; Zambrano,Luis; Escalera-Vázquez,Luis H.. |
| We compared fish diet composition between permanent (P) and semi-permanent (SP) pools in Petenes Biosphere Reserve (PBR), Campeche. A total of 445 gut contents were examined to determine stomach relative fullness (RF), fish diet as index of niche breadth (INB) and diet overlap. In SP pools, species showed a RF of 1.66 (57.20 % empty stomachs) whereas in P pools, the RF was 2.91 (31.16%). We classified fish diet into six trophic groups: detritivorous, herbivorous-detritivorous, insectivorous, piscivorous, omnivorous and malacophagous. Species in P pools were found to be specialist. Conversely, species present in both habitats shifted to generalist patterns. There was a 54.0% dissimilarity in fish diet composition between pools. From all items identified,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campeche; Feeding ecology; Freshwater fish; Mexico; Petenes Biosphere Reserve. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400881 |
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| Milford, Anna Birgitte. |
| Coffee producers in many parts of the world have the option of either becoming a member of and selling their coffee to a Fairtrade and organic co-operative, or selling it to a ‘‘coyote’’, the Central American nickname for intermediary purchaser. This study investigates why different producers make different choices, looking at both material and immaterial costs and benefits of the two choices. A qualitative study from Chiapas (Mexico) finds that a main reason for not choosing the co-operatives is the production requirements that follow organic certification. A survey on production costs confirms that members of an organic co-operative have more work hours than nonmembers in the same area. A probit analysis indicates that both coffee plot size and number of... |
| Tipo: Journal paper |
Palavras-chave: Farm economics; Social aspects; Markets and trade; Mexico. |
| Ano: 2014 |
URL: http://orgprints.org/31567/1/Milford%20Agri%20Hum%20Values%202014.pdf |
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| Este es básicamente un proyecto de tesis que me gustaría ir enriqueciendo con las lecturas que se vayan haciendo. |
| Tipo: Project description |
Palavras-chave: Mexico. |
| Ano: 2023 |
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| Paull, John. |
| Organic production (including agriculture, wild culture, forestry and aquaculture) is a worldwide phenomenon that is practiced in at least 172 countries. The Organics Olympiad presents 14 indices of global organics leadership, each at three levels (Gold, Silver and Bronze). The Organics Olympiad of 2016 yields 29 countries as global organics leaders, and confirms that organics leadership is diversely distributed across countries, large and small, rich and poor, developed and less so, and cuts across linguistic, ethnic and cultural boundaries. Australia continues to lead the world in organic agriculture hectares. Australia also leads in the increase of organic hectares over the past four years (since the Organics Olympiad 2012) and in the number of WWOOF... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems; Food systems; Africa; Asia; Australia; China; Denmark; European Union; Finland; France; India; Italy; Latin America; Lithuania; Switzerland; Tunisia; United States; World; Knowledge management; Europe; Germany; Mexico. |
| Ano: 2016 |
URL: http://orgprints.org/30369/1/Paull2016.OlympiadJSDS.pdf |
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| Malaga, Jaime E.; Williams, Gary W.. |
| This article analyzes the export performance of the Mexican agricultural and food sector in recent years with emphasis on the changing competitiveness of those exports in the U.S. and world markets. The paper includes an examination of the general trends in Mexican agricultural and food exports, an analysis of the international competitiveness of the major subgroups of Mexican agriculture based on the Revealed Comparative Advantage methodology, an assessment of the competitiveness of Mexican exports of specific agricultural and food products to the United States, and a consideration of the effectiveness of Mexico's agricultural and food export market diversification efforts. |
| Tipo: Journal Article |
Palavras-chave: Mexico; Export; Competitiveness; Agricultural.; Agribusiness. |
| Ano: 2010 |
URL: http://purl.umn.edu/93507 |
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| Debt problems of developing countries seriously constrain their economic and social development as well as the prospects and pace of economic recovery in the developed countries. Debt and trade problems of Mexico are particularly important for the U.S. agricultural economy because of the size and importance of U.S.-Mexican agricultural trade. The importance of Mexico as a U.S. trading partner lends importance to research on Mexican supply, demand, and trade of agricultural commodities and on macroeconomic and monetary policies affecting Mexico's demand and capacity to import. The ninth meeting of the Consortium on Trade Research focused on the debt, trade, and payments problems of developing countries and on U.S.-Mexican economic relationships. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Debt; Trade; Mexico; United States; Agricultural policy; Research.; International Relations/Trade. |
| Ano: 1983 |
URL: http://purl.umn.edu/51270 |
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| Winters, Paul C.; Stecklov, Guy; Davis, Benjamin. |
| In this paper, we explore the role of social networks in the migration decision focusing on the distinct influence networks have on domestic and international migration. The analysis focuses particular attention on the composition of migrant networks in order to improve our understanding of how network composition influences the migration decision. Using data from rural Mexico, we consider migration in a multiple choice context allowing for the possibility that individuals can migrate within Mexico for agricultural and non-agricultural employment as well as to the United States. Our principle result is that the parts are greater than the whole; using disaggregated measures of social networks highlights the complexity of network effects on migration... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Migration; Networks; Mexico; Network composition; Labor and Human Capital. |
| Ano: 2001 |
URL: http://purl.umn.edu/12952 |
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| Registros recuperados: 152 | |
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