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| Registros recuperados: 53 | |
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| Mai,Patricia; Rossado,Andrés; Bonifacino,José Mauricio; Waechter,Jorge Luiz. |
| ABSTRACT We provide an updated list of the vascular epiphytic flora occurring in native environments of Uruguay based on literature review, herbarium specimens, and fieldwork throughout the country. The catalogue provides standardized information for each species, including accepted name, synonyms used within Uruguay, epiphytic category, distribution within the country, habitat, conservation status, observations, and a voucher citation. The effort documented 73 species for the epiphytic flora of Uruguay (3 % of the flora), distributed among 29 genera and 12 families. Bromeliaceae was the richest family (17), followed by Polypodiaceae (16) and Orchidaceae (12). Tillandsia stood out as the most speciose genus with 15 species. Characteristic holoepiphytes was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation status; Epiphytic category; Geographic distribution; Hemiepiphytes; Holoepiphytes; Subtropical forests; Uruguay; Vascular epiphytes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400683 |
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| Perea,Daniel. |
| Se describe una especie de gliptodonte, Pseudoplohophorus absolutus n. sp. procedente del Mioceno Superior de Uruguay. El holotipo está representado por cráneo, mandíbula, gran parte de la coraza dorsal cefálica, tubo caudal, húmero, huesos de la mano, algunas vértebras, fragmentos de pelvis y placas de anillos caudales. Estos materiales fueron comparados con ejemplares muy completos de Sclerocalyptinae neógenos de Argentina y Uruguay. A base de estas comparaciones se propone la sinonimia parcial de Pseudoplohophorus Castellanos con Stromaphoropsis Kraglievich y la inclusión del género Hoplophractus Cabrera dentro de Eosclerocalyptyus C. Ameghino. Se redefine una biozona caracterizada por el género Pseudoplohophorus incluida en depósitos de la Formación... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glyptodontidae; Mioceno Superior; Uruguay; Sistemática; Bioestratigrafía. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000100012 |
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| Gutiérrez,Pedro R.; Beri,Ángeles; Balarino,María Lucía; Cernuschi,Federico. |
| Se presenta el análisis paleopalinológico de cuatro testigos laterales del pozo Cerro Largo Sur- 24 (14,9, 14,8, 7,8 y 3,5 mbpp), referibles a la Formación San Gregorio (Melo, departamento de Cerro Largo, Uruguay). Las asociaciones estudiadas incluyen esporas, prasinofitas y acritarcas (publicados en la Parte I), y granos de polen. En esta contribución se presentan los granos de polen monosacados, bisacados, estriados y plicados. Las asociaciones palinológicas son referidas al Pérmico Temprano, basado en el registro previo de sus componentes, y en parte correlacionadas con las Biozonas de Cristatisporites (cuenca Chacoparanense), Pakhapites fusus-Vittatina subsaccata (cuencas Paganzo, Calingasta-Uspallata, Río Blanco y San Rafael) y Vittatina costabilis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palinología; Granos de polen; Pérmico Inferior; Formación San Gregorio; Pozo CLS-24; Uruguay. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000300008 |
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| Beri,Ángeles; Gutiérrez,Pedro R.; Cernuschi,Federico; Balarino,María Lucía. |
| El presente trabajo consiste en el análisis palinológico de cuatro muestras provenientes de la perforación DCLS24, realizada por DINAMIGE cuya litología corresponde a pelitas negras laminadas formadas en un ambiente glaciomarino, asignables a la Formación San Gregorio, de edad pérmica temprana. Las asociaciones encontradas están compuestas por esporas, granos de polen, algas, acritarcas y algunos elementos de afinidad incierta. En esta contribución se realiza la descripción sistemática de 38 especies de esporas, seis de algas, un acritarca y dos de afinidad incierta. Se describen por primera vez para el Pérmico de Uruguay Leiotriletes corius Kar y Bose, Brevitriletes leptoacaina Jones y Truswell, B . parmatus (Balme y Hennelly) Backhouse, Grossusporites... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palinología; Sistemática; Pérmico Inferior; Formación San Gregorio; Uruguay. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000100018 |
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| Martínez,Sergio; Rojas,Alejandra; Ubilla,Martín; Verde,Mariano; Perea,Daniel; Piñeiro,Graciela. |
| Dates of marine Holocene molluscs from Uruguay (Villa Soriano Formation) range from 6849 to 1858 cal. years BP. There are no significative gaps among the different ages obtained, with the exception of the interval 2276-2830 calculated years BP. Two kinds of concentrations are distinguished: autochthonous, for which a low energy depositional environment is inferred, and parautochthonous, deposited in foreshore and nearshore high-energy environments. Results of different types of multivariate analyses on presence-absence and abundance data show that only three localities are clearly differentiated from the others. The discrimination of two of them (Arazatí, Las Cañas) is explained by the presence of only one or two species, but the third (Punta Rasa) is the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Uruguay; Holocene; Paleoecology; Shell-beds; Mollusca; Bivalvia; Gastropoda. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000200009 |
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| Brugnoli,Ernesto; Clemente,Juan; Boccardi,Lucía; Borthagaray,Ana; Scarabino,Fabrizio. |
| Limnoperna fortunei, an Asiatic rivers bivalve has become a worldwide problematic invasive species causing several water quality and macrofouling problems. In the Neotropical region it was first recorded in 1991 in the Río de la Plata coast, Buenos Aires province. Since this, it showed a quick upstream invasion into the principals aquatic systems of the Plata Basin. Nevertheless, there is not a study about its invasion and distribution process in aquatic systems of Uruguay. We describe the new records of Limnoperna fortunei in Uruguayan coast of Río de la Plata, Santa Lucía, Negro and Uruguay Rivers. With these results we aim to estimate its distributional limits for Uruguay main hydrographical basins. We also deal with the role of salinity as the main... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Invasive mollusk; Biogeography; Salinity; Uruguay. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000200004 |
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| PÉREZ,M. C.; BONILLA,S.; MARTÍNEZ,G.. |
| This paper deals with the analysis of phytoplankton composition and abundance from four sampling stations at the polymictic system, Rincón del Bonete water reservoir in Uruguay. Sampling data were obtained in 4 seasonal periods between February and November 1993. A hundred and twenty-four taxa were identified, where Aulacoseira granulata (Ehrenb.) Simon., A. granulata var. angustissima (Muller) Simon., A. granulata var. angustissima f. spiralis, (Muller) Simon., A. cf. ambigua, (Grun.) Simon., A. cf.. distans (Ehrenb.) Simon., Cryptomonas spp. and Synedra ulna (Nitzsch) Ehrenberg, were always present. Phytoplankton abundance fluctuated between 29 (autumn) and 2129 (summer) ind/ml. The general dominance of Aulacoseira spp. could be related to the polymictic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microalgae; Freshwater; Artificial lakes; Aulacoseira; Uruguay. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400002 |
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| Carrasco-Letelier,Leonidas; Mendoza,Yamandu; Ramallo,Gustavo. |
| This work studies the acute contact toxicity of oxalic acid (OA) on a honeybee polyhybrid subspecies (Apis mellifera), which is the dominant biotype in southwestern zone of Uruguay (SWZU) and the country's most important honey-producing region. We determined the mean lethal dose (LD50), as well as the no observed effect level (NOEL) and the lowest observed effect level (LOEL) values. We also estimated the total number of honeybees per hive in the test area. The aim was to assess the relationship between the maximum OA dose used in Uruguay (3.1 g OA per hive) and the toxicological parameters of honeybees from SWZU. The current dose of 3.1 g OA per hive corresponds to 132.8 OA per honeybee since determined NOEL is 400 OA per honeybee; our results indicate... |
| Tipo: Journal article |
Palavras-chave: LD50; Uruguay. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000200019 |
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| Bravo-Ureta,Boris E; Moreira,Víctor H; Arzubi,Amilcar A; Schilder,Ernesto D; Álvarez,Jorge; Molina,Carlos. |
| The progressive liberalization of agricultural markets, along with the threat that imported products can pose to local producers, reveals the importance of productivity growth as a mechanism to improve competitiveness. Technical efficiency measurement is the most studied component of productivity because it can help to generate valuable information for policy formulation and farm level decisions focused on the improvement of farm performance. This study uses unbalanced panel data sets for dairy farms from Argentina, Chile and Uruguay, to estimate stochastic production frontier models. These frontiers are then used to estimate economies of size, technological change and technical efficiency. All estimations are based on the Battese and Coelli (1992) model,... |
| Tipo: Journal article |
Palavras-chave: Stochastic frontiers; Dairy farms; Argentina; Chile; Uruguay. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000400006 |
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| Registros recuperados: 53 | |
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