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| Registros recuperados: 259 | |
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| Geise,Lena; Astúa,Diego. |
| Gracilinanus microtarsus, from the Atlantic Forest and G. agilis, widespread in central Brazil in the Cerrado and in the northeastern Caatinga are two small Neotropical arboreal opossum species not frequently recorded in simpatry. Here we report eight G. agilis specimens from three localities and 17 G. microtarsus, from 10 localities, all in Minas Gerais, Rio de Janeiro and Bahia states. Species proper identification followed diagnostic characters as appearance of dorsum pelage, ocular-mark, ears and tail lengths and size proportion of the posteromedial vacuities in cranium. Chromosomes in metaphases of five specimens were obtained for both species. Our records extend the previous known geographical distribution of G. microtarsus to Chapada Diamantina, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: South America; Neotropical marsupials; Karyotypes; Habitat use. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400030 |
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| Ferreira,Angélica Cândida; Araújo,Josiane Silva; Almeida Jr,Eduardo Bezerra de; Zickel,Carmen Silvia. |
| Abstract: In the present work, we synonymize Micropholis compta under M. gardneriana due to the overlap of morphoanatomical characters and the absence of distinctive attributes, verified during taxonomic and anatomical study of the genus Micropholis for Brazil. This study provides an updated description of M. gardneriana, including macro- and micro-morphological data, a distribution map, and comments on conservation status, ecological and taxonomy. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Chrysophylloideae; Leaf anatomy; Neotropics; South America; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100501 |
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| Ohara,Willian Massaharu; Loeb,Marina Vianna. |
| Abstract The fishes herein included were collected in four small streams of the upper rio Tapajós basin. Through fieldwork carried out in 2011, 2013 and 2014 during the low water season 1.728 specimens belonging to 22 species distributed in 11 families, and five orders were captured. Characidae was the most representative family both in number of species and specimens captured. The most abundant species were Hyphessobrycon melanostichos, H. hexastichos, and H. notidanos. Five species are recognized as new, and four as endemic to the upper rio Tapajós basin. This study represents the first fish inventory for the region and will provide valuable information for the conservation of the poorly known diversity of fishes of the Chapada dos Parecis, in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: South America; Neotropical fish; Amazon; Endemism. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400302 |
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| Cano,María J; Alonso,Marta. |
| Two mosses are newly reported for Argentina based on recent collections from Salta province: Aligrimmia peruviana R.S. Williams and Conostomum cleistocarpum Herzog. Hitherto, they were considered endemic to Bolivia and Peru, respectively. In addition, Crossidium squamiferum (Viv.) Jur., a species distributed in Europe, North America, Mexico, Asia, North Africa, and Macaronesia, is here reported for the first time in South America. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aligrimmia; Conostomum; Crossidium; Distribution; Flora; Salta; South America. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722017000200006 |
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| Vanni,Ricardo O. |
| The papilionoid genus Stylosanthes Sw. includes about 50 spp. distributed world wide in the tropics, approximately half of them grow in South America.The present study focuses on South American Stylosanthes. Based on examinations of herbarium specimens, as well as field observations, a total of 25 taxa (23 spp. and 2 varieties) are here described and identified with a key. Most of the species have been found to be more widely distributed than expected from the previous taxonomic literature, and the genus appears to be mainly concentrated in Brazil and Paraguay. Stylosanthes leiocarpa Vogel is new to the flora of Argentina and the presence of S. nervosa J. F. Macbr. is confirmed in Argentina. The nomenclature of S. guianensis (Aubl.) Sw. is analyzed.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leguminosae; South America; Stylosanthes; Taxonomy; Distribution; Nomenclature. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722017000300012 |
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| Chiarini,Franco E.; Moyetta,Natalia R.; Barboza,Gloria E.. |
| The mature fruits of 10 South American species of Solanum sect. Torva were studied. Cross and longitudinal microtome sections, stained with astra blue/basic fuchsin, were made for microscopic examination. All species present an epidermis formed by a unistrate layer of small, isodiametric cells, with dense content and cellulosic walls. Immediately below, a hypodermis is always found, consisting of a well-defined layer of lignified cells with a single calcium oxalate crystal occupying the whole lumen of each cell. This is followed by one layer of cellulosic, isodiametric cells with dense cytoplasm and then several collenchymatous layers, sometimes with sclerified cell walls. The mesocarp comprises two zones histologically differentiated: an external one... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Berry; Dispersal syndrome; Pericarp; Solanum subgen. Leptostemonum; South America. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722010000200004 |
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| Puentes,R; Eliopulos,N; Pérez,R; Franco,G; Sosa,K; Bianchi,P; Furtado,A; Hübner,S.O.; Esteves,P.A.. |
| Canine parvovirus type 2 (CPV-2) is a leading cause of diarrhea in puppies in several parts of the world. In this study CPV-2 was detected and recovered from puppies showing clinical disease from Montevideo, Uruguay. Samples were processed and used to infect CRFK and MDCK cells in order to isolate the virus. Out of twelve, two samples were positive for CPV-2. A genomic region of 583 bp was amplified and the molecular characterization was performed by sequencing, phylogenetic analysis and Restriction Fragment Length Polymorphism (RFLP). Two isolated viruses (UY1 and UY2) were CPV-2c-like viruses. The comparison between the cytophatic effect (CPE) of CPV-2 (vaccinal virus) and CPV-2c (isolated virus) on primary canine cells cultures and on CRFK line cells,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canine Parvovirus 2c; Isolation; Molecular characterization; South America. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300022 |
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| Schoenlein-Crusius,Iracema Helena; Grandi,Rosely Ana Piccolo. |
| Aquatic Hyphomycetes, also named Ingoldian or freshwater fungi, constitute a group of anamorphic fungi that are typically aquatic, producing tetraradiate, sigmoid or spherical conidia on submerged plant debris (leaf litter, petioles, bark, etc.). Mainly occurring in lotic systems, these fungi are considered to be one of the most active groups of organisms in the decomposition of leaf litter, and play a crucial role in the trophic chain. In South America, aquatic Hyphomycetes are mentioned for Argentina, Brazil, Chile, Ecuador, Peru and Venezuela, totalizing the report of about 90 species. Almost all studies are taxonomical, some with proper drawings and complete descriptions, but no keys have been provided yet, nor there is a specific culture collection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anamorphic fungi; Aquatic Hyphomycetes; Biodiversity; Brazil; South America. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000300001 |
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| Niggol Seo,S; Mendelsohn,Robert. |
| This study estimates the impact of climate change on South American agriculture taking into account farm adaptations. The study used a Ricardian analysis of 2300 farms to explore the effects of global warming on land values. In order to predict climate change impacts for this century, were examined climate change scenarios predicted by three Atmospheric Oceanic General Circulation Models (AOGCM): the Canadian Climate Center (CCC), the Centre for Climate System Research (CCSR), and the Parallel Climate Model (PCM) models. Several econometric specifications were tested, and five separate regressions were run: for all farms, small household farms, large commercial farms, rainfed farms, and irrigated farms. Farmland values will decrease as temperature... |
| Tipo: Journal article |
Palavras-chave: Climate change; Agriculture; Ricardian approach; South America. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100007 |
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| Rodriguez,Alejandro Martín; Schild,Carlos Omar; Cantón,Germán José; Riet-Correa,Franklin; Armendano,Joaquín Ignacio; Caffarena,Rubén Darío; Brambilla,Emilio César; García,Juan Agustín; Morrell,Eleonora Lidia; Poppenga,Robert; Giannitti,Federico. |
| ABSTRACT: White muscle disease (WMD), nutritional myodegeneration or enzootic muscular dystrophy, is a nutritional condition associated with selenium and/or vitamin E deficiency in ruminants. These elements are constituents of the major body antioxidant systems. Depletion of selenium results in oxidative damage to cardiac and skeletal muscle cells, resulting in myodegeneration and myonecrosis, typical lesions of WMD. Selenium deficiency is common in South America, but WMD is underreported. This research describes clinical, biochemical and pathological findings in two episodes of WMD associated with selenium deficiency in beef and dairy calves in Argentina and Uruguay with concurrent copper deficiency in one of them, which resulted in spontaneous calf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mortality; Cardiac failure; Mineral deficiencies; Nutritional myopathy; South America. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000500550 |
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| Registros recuperados: 259 | |
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