|
|
|
| Registros recuperados: 242 | |
|
| |
|
|
| Sombroek,Wim. |
| Thirteen main landform units are distinguished for the whole of the forested Amazon region, each with its specific soil pattern and vegetation structure. These landform-soil-vegetation units are delineated on a small-scale map and illustrated by a schematic cross-section. Floristic diversity of the gamma type is to be highest on the steepland-and-valley complexes of the Andean fringe, on the crystalline shield uplands, on the inselberg complexes, and on the eutric variant of the western sedimentary plains. Endemism is expected to be highest on the sandy plains, and parts of the table lands and inselberg complexes. Speciation, linked to the concept of forest refuge areas, is likely to be highest on the sandstone table lands, on the stretches of Amazon... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Major landforms; Tropical soils; Floristic biodiversity. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000100081 |
| |
|
|
| Thatcher,Vernon E.. |
| Two new genera and species of Paramphistomidae (Tremadota, Digenea) are described from freshwater fish of the Brazilian Amazon. Anavilhanatrema robustagen. et sp. nov. is characterized as having a cylindrical body with an anterior expansion, small suckers, a small cirrus sac, large lobate testes, a lobate ovary, long ceca and extensive vitellaria. Pacudistoma turgidagen. et sp. nov., on the other hand, is distinguished by having a stout, cylindrical body, a large oral sucker with internal diverticula, a large genital sucker, smaller lobate testes, a spherical ovary, long ceca and relatively extensive vitellaria. Both species appear to be host specific with A. robustafound in Pristobrycon striolatus(STEINDACHNER) while P. turgidaoccurus in Hyleus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphistome; Trematode; Amazon; Fish parasite.. |
| Ano: 1992 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671992000400609 |
| |
|
|
| THATCHER,Vernon E.. |
| Anphira branchialisgen. et sp. nov. (Crustacea, Isopoda, Cymothoidae) is described from the dorsal areas of the gill chambers of three species of piranhas (Serrasalmusspp.). The fishes were caught in rivers near Manaus, Amazonas State and on Maracá island, Federal Territory of Roraima, Brasil. The new genus and species is characterized by having large, flat coxal plates on ail 7 pereonites. These plates usually extend beyond the margins of the following segments and the 7th ones extend nearly to the pleotelson and cover the lateral margins of the pleonites. The mandible of this species is rounded, "foot shaped" and without incisor. The mandibular palp is short and stout. The maxillules have 3 terminal and 2 subterminal spines. The pleopods are simple... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isopod; Cymothoid; Parasite; Piranha; Amazon. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000300297 |
| |
|
|
| PEREIRA,Adriany Duarte; PINTO,Pedro Luiz Silva; CAMARGO,Juliana de Souza Almeida Aranha; SOUZA,Juliana Bianca Rocha de; AMANTE,Carlos Antônio; SOUZA,Viviane Krominski Graça de; SIMONE,Luiz Ricardo Lopes de; CAMARGO,Luís Marcelo Aranha. |
| ABSTRACT Schistossomiasis is a parasitic disease, caused by helminths of the genus Schistosoma and transmitted in Brazil by snails of the genus Biomphalaria. The municipality of Ouro Preto do Oeste, Rondônia, in the Brazilian Amazon Region, has unusually registered more than 900 cases of schistosomiasis in the last 10 years. The aim of this study was to investigate de potential of transmission of schsitosomiasis in Ouro Preto do Oeste. A total of 1,196 people in a risk area for the disease transmission were requested to answer a clinical-epidemiological survey and to collect feces samples for examination. All the samples that underwent examination resulted negative for S. mansoni. Two hundred and sixty-eight snails were collected in the locality of Ouro... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Schistosomiasis; Amazon; Transmission. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400377 |
| |
|
|
| FERNANDES,Kamila Rangel Primo; BITTERCOURT,Paulo Senna; SOUZA,Afonso Duarte Leão de; SOUZA,Antonia Queiroz Lima de; SILVA,Felipe Moura Araújo da; LIMA,Emerson Silva; ACHO,Leonard Domingo Rosales; NUNOMURA,Rita de Cássia Saraiva; TEIXEIRA,Ana Frazão; KOOLEN,Hector Henrique Ferreira. |
| ABSTRACT Virola venosa, popularly known in Brazil as ucuuba-da-mata, occurs naturally in the Amazon region and has potential to provide useful natural compounds, as already known for other Virola species. Therefore, the objective of this study was to determine the chemical composition of bark and leaf extracts of V. venosa, and to test the antioxidant capacity and α-glucosidase inhibition potential of their compounds. Polar extracts showed to be more active in both assays, therefore a bioactivity-guided fractionation was performed to identify the compounds that were responsible for the recorded activities. Using a combination of LC-MS/MS analysis and isolation with NMR identification, eight phenolic compounds were identified. Assays with pure compounds of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Α-glucosidase inhibition; Antioxidant compounds; Ferulic acid; Amazon. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000100048 |
| |
|
|
| Feitosa,Marlisson Augusto Costa; Julião,Genimar Rebouças; Costa,Manoel Djalma Pereira; Belém,Braulio; Pessoa,Felipe Arley Costa. |
| This paper aimed to evaluate the richness, abundance and frequency of sand fly occurrence in rural and urban areas American visceral Leishmaniasis -AVL is endemic in the study area of Santarém municipality, Pará state. Sand flies were collected during 1995-2000, using CDC light traps placed in neighborhoods and rural areas of the municipality. A total of 53.454 individuals and 26 species of sand flies were collected. The most abundant species in both urban and rural environments was Lutzomyia longipalpis, vector of AVL in the area. The highest species richness by capture was in rural area. In all years sampled, the largest number of species of sand fly collected was always in rural areas. The species of sand flies in urban and rural area were similar in 11... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leishmaniasis; Anthropic impact; Amazon. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000400008 |
| |
|
| |
|
| |
|
|
| LEITE,Rosseval Galdino; ARAUJO-LIMA,Carlos A.R.M.. |
| Information on larval fish feeding is essential for understanding their trophic relations, including the management in conditions totally or partially controlled by humans. An experiment was designed to evaluate the larval diets of three commercially important species. Four varzea-lakes and the adjacent river were sampled with bongo and hand nets from January 1993 to November 1995. Larval diets were evaluated by length-classes and capture sites, and were tested by two factor ANOVA. The larvae were feeding in all habitats, except in the flooded forests. The three species had different diets, which varied with their length and lake. The rotifers were the main initial food item of the three species, replaced by fish larvae in Brycon cephalus, cladocerans in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Brazil; Feeding; Fish larvae; Food size. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000300499 |
| |
|
|
| ADIS,Joachim; PAARMANN,Wilfried; AMORIM,Maristela A.; ARNDT,Erik; FONSECA,Claudio R. V. da. |
| Over a seven year period from 1991 to 1997, 22 species of tiger beetles, representing nine genera, were recorded near Manaus, Brazil. In the Whitewaterfloodplains along the Rio Solimões-Amazonas (Ilha de Marchantaria), three diurnal species inhabit inundation forests and six species (two diurnal, four nocturnal) live in open areas. Data on their natural history and adaptation to living conditions in floodplains are presented. Fifteen species were located on non-flooded uplands (Reserva Florestal A. Ducke). Five diurnal species inhabit the forest floor, two species are canopy dwellers, and eight species (seven diurnal, one nocturnal) live in open areas on whitesand or laterite. Only one species, Pentacomia lacordairei, was found in both floodplain and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tiger beetles; Floodplains; Várzea; Terra firme; Amazon; Neotropics. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300247 |
| |
|
|
| ZIMMERMAN,Robert H; PAULINO,Francisco Xavier; ARRUDA,Mercia de. |
| From January 19 to February 25, 1997 an entomological survey of the seringais and larger towns along the Acre and Purus rivers was made as part of the project “Revisitando a Amazônia de Carlos Chagas; da Borracha a Biodiversidad”. Eleven anopheline species and 1285 specimens were collected landing on human baits. The four most abundant species were Anopheles albitarsis s.l. (n=778), A. darlingi (n=359), A. rangeli (n=69) and A. oswaldoi (n=60). A total of 252 larvae were collected of which 10 anopheline species were identified. The most abundant species collected were A. albitarsis s.l. (n=88), A. deaneorum (n=45) and A. triannulatus (n=40). The low numbers of Anopheles collected and the absence of the principal malaria vector A. darlingi at the seringais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anopheles; Malaria; Amazon. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671999000100165 |
| |
|
|
| Calzada,Javier; Delibes,Miguel; Keller,Claudia; Palomares,Francisco; Magnusson,William. |
| A new record of a very rarely observed mammal, the bushy-tailed opossum, Glironia venusta (Didelphimorphia), was obtained for the Adolpho Ducke Forest Reserve, Manaus, Amazonas state, Brazil. Only 17 other records existed of this species, most from the 1980s. There were only three previous records of the species from Brazil (in the states of Pará, Amazonas and Rondônia). This new record supports the notion that G. venusta is a locally rare species throughout its range, but widely distributed in Brazilian Amazonia. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Bushy-tailed opossum; Didelphidae; Didelphimorphia; Glironia venusta. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000400027 |
| |
|
|
| FROIDEVAUX,Jérémy S.P.; ROEMER,Charlotte; LEMARCHAND,Clément; MARTÍ-CARRERAS,Joan; MAES,Piet; RUFRAY,Vincent; URIOT,Quentin; URIOT,Sylvain; LÓPEZ-BAUCELLS,Adrià. |
| ABSTRACT The Amazonian basin harbours some of the most bat-diverse ecosystems worldwide. Yet, information on elusive, high-flying bat species such as Molossidae is scarce or virtually missing in the literature, which hampers conservation efforts both locally and globally. The recent advent of new technologies specifically designed to survey bats, such as passive ultrasound detectors and acoustic lures, has significantly increased understanding of bat ecology and distribution, and has allowed researchers to gather new and valuable information which was impossible to collect in the past. We undertook a rapid bat diversity assessment in French Guiana using acoustic lures to aid in capturing high-flying insectivorous bat species. Here we report the second and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Bats; Bioacoustics; Molossidae; Mitochondrial sequences. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400327 |
| |
|
|
| SOUMIS,Nicolas; ROULET,Marc; LUCOTTE,Marc. |
| Many potentially harmful pesticides for both human health and the environment are used in Brazilian Amazon. However, no scientific datum on pesticide usage is presently available for this region. Consequently, it is difficult to assess which substances arc used and in which quantities. As an important premise for future work on pesticide contamination in the county of Santarém (State of Pará, Brazil), a survey was conducted in order to qualify and quantify the use of some pesticides in this region. This investigation was made between January and March 1997 and August and October 1998 and revealed use of several organophosphates, synthetic pyrethroids and carbamates insecticides. Furthermore, many herbicides and fungicides were listed. These pesticides are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Pesticides; Consumption; Utilization. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000400615 |
| |
|
|
| Lu,Dengsheng; Batistella,Mateus. |
| Many texture measures have been developed and used for improving land-cover classification accuracy, but rarely has research examined the role of textures in improving the performance of aboveground biomass estimations. The relationship between texture and biomass is poorly understood. This paper used Landsat Thematic Mapper (TM) data to explore relationships between TM image textures and aboveground biomass in Rondônia, Brazilian Amazon. Eight grey level co-occurrence matrix (GLCM) based texture measures (i.e., mean, variance, homogeneity, contrast, dissimilarity, entropy, second moment, and correlation), associated with seven different window sizes (5x5, 7x7, 9x9, 11x11, 15x15, 19x19, and 25x25), and five TM bands (TM 2, 3, 4, 5, and 7) were analyzed.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Texture; Aboveground biomass; TM image; Correlation; Amazon. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672005000200015 |
| |
|
|
| Schineider,Larissa; Ferrara,Camila; Vogt,Richard C. |
| The biology and ecology of South American turtles is still poorly known, particularly, for the Brazilian species. Laboratory studies are essential to understand the life cycles of aquatic turtles species and to help in formulating management plans for their conservation. As a contribution to the knowledge of Podocnemis erythrocephala species, we give a description of its species-typical behaviors, categorized as: maintenance, locomotion, feeding, agonistic and reproduction, based on captives observations of four pairs of turtles in an aquarium in Manaus, Brazil. Similarities and differences with the repertoires of other turtle species are discussed, concluding that turtles have much more complex adaptative strategies and social life than was believed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ethogram; Captivity; Behavior; Turtle; Amazon. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672010000400018 |
| |
|
|
| CHALITA,Patrícia Bombonati; FARIAS,Eliane do Nascimento Cunha; COSTA,Ismaele Breckenfeld da; SOUSA,Brenda Ferreira; SANTOS,Marco Antônio Oliveira dos; ALBUQUERQUE,Teresinha Costa Silveira de; VITAL,Marcos José Salgado; SILVA,Krisle da. |
| ABSTRACT Brazil nut is a very important nontimber forest product in the Amazon region. Propagation of this tree still represents a challenge due to slow and uneven seed germination. In this context, plant growth-promoting bacteria can facilitate the process of propagation. The aims of this study were to isolate and characterize endophytic bacteria from the roots of Brazil nut trees in native terra firme forest and cultivation areas in northern Brazil, and to identify mechanisms by which bacteria act in plant growth promotion. Overall, 90 bacterial isolates were obtained from the roots of Brazil nut trees in monoculture, agroforestry and native forest areas by using different semisolid media. The isolates were characterized by sequencing the 16S rRNA gene.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 16S rRNA; Phosphate solubilization; Indole compounds; Biological nitrogen fixation; Plant growth-promotion bacteria; Amazon. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400257 |
| |
|
|
| COSTA,Igor David da; SOARES,Maiza Oliveira. |
| Trophic relationships in fish communities are affected by the availability of resources, which in turn is affected by spatial and temporal variations throughout the year. The aims of this study were to characterize the diet of A. tetramerus in a streamlet in the north of Brazil and compare its composition in different hydrological seasons (wet and dry seasons). Collections were performed every two months from October 2011 to September 2012 with the aid of seine nets, hand net and fishing traps in the streamlet located in the Machado River drainage basin in the Rondônia state. Most of the specimens collected were quite small (< 40 mm) and had empty stomachs. Our results showed that A. tetramerus feeds on a wide variety of items of plant origin, such as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Perciformes; Amazon; Feeding habits; Ornamental fish. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400365 |
| |
|
|
| PAARMANN,Wilfried; ADIS,Joachim; LÜDECKE,Kirsten; TOBASCHUS,Nicole; FONSECA,Claudio R. V. da. |
| The spatial and temporal distribution of a guild of eight diurnal tiger beetle species was studied on a 105 m long transect near the field station of the Reserva Florestal A. Ducke near Manaus (AM), Brazil. The transect followed a path that included both shaded and an open areas. Five of the species, restricted to primary forest, occurrred only in shaded areas of the transect, and three species occurred in open areas. Of all eight species only two of the open habitat species showed no clear seasonality in adult activity. In six species the activity of adults was limited to the rainy season. The most pronounced annual rhythm was found in Pentacomia ventralis, an open habitat species. Activity of adults was limited to October/November. First in-star larvae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tiger beetles; Guild structure; Terra firme; Amazon. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300331 |
| |
| Registros recuperados: 242 | |
|
|
|
