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| Registros recuperados: 239 | |
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| Pereira, Josefa Claudineide Sousa; Passador, Rafael Junior; Mendes-Júnior, Raimundo Nonato Gomes; Tavares-Dias, Marcos. |
| This study compared the parasites fauna of Hyphessobrycon takasei and H. amapaensis from hydrographic basins in Amapá state, Brazil. Of the 42 H. takasei examined, 95.2% were parasitized by one or more species such as Dactylogyridae gen. sp., encysted metacercariae of digenean, adults and larvae of Procamallanus (Spirocamallanus) inopinatus and larvae of Camallanus sp. A total of 224 parasites were collected from H. takasei, and there was a dominance of nematode species and dispersion pattern aggregated of parasites. The species richness of parasites varied of 0 to 3 species, Brillouin index of 0-0.97 and evenness of 0-0.70. Of the 32 specimens of H. amapaensis examined, 28.1% were parasitized by Camallanus sp. larvae, which presented random dispersion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Parasites; Ornamental fish Monogenea Nematoda.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/42839 |
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| Pablo Lehmann,A.; Lazzarotto,Henrique; Reis,Roberto E.. |
| Parotocinclus halbothiis described as a new species from the Trombetas and Marowijne river basins, in Brazil and Suriname. The new species is distinguished from its congeners in the Guianas, Orinoco, and Amazon basins by details of color pattern, form and arrangement of bony plates, body shape, and morphometric features. It is distinguished from all other species of Parotocinclusby the elongation of the canal cheek plate on the ventral surface of head posteriorly to contact the cleithrum. The new species is differentiated from Parotocinclus collinsae, the most similar species in terms of color pattern, by the small, circular, median abdominal plates, the poorly developed preanal shield with two or three plates, and by having the adipose fin rudimentary.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Biodiversity; Freshwater; Miniature fish; Systematics. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100027 |
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| Oliveira, Samuel Jose de Magalhaes; Valentim, Judson Ferreira; Barioni, Luis Gustavo; Abreu, Urbano G.P.; Rostand, Andre Ramalho. |
| O estado de Rondônia, que se localiza na Amazônia brasileira, testemunha o debate entre a preservação ambiental e a expansão da fronteira agrícola brasileira. Este trabalho visa contribuir com este debate identificando a relação entre desmatamento e variáveis indicativas do uso de solo, tais como a área plantada com as principais culturas, o rebanho bovino e as taxas de variação destas entre 2001 e 2006 em cada município do estado. A dinâmica do uso do solo no estado é ilustrada com mapas e através da apresentação de matriz de correlação entre as diferentes variáveis acima citadas e o desmatamento. É alta a correlação entre área total desmatada e efetivo do rebanho bovino, mas não se observa correlação entre desmatamento acumulado e evolução do efetivo em... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Desmatamento; Pecuária; Amazônia; Agricultura; Meio-ambiente; Deforestation; Cattle ranching; Amazon; Agriculture; Environment; Livestock Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/110030 |
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| ALVES,LUIZ C.P.S.; ZAPPES,CAMILAH A.; OLIVEIRA,RAFAEL G.; ANDRIOLO,ARTUR; AZEVEDO,ALEXANDRE DE F.. |
| Botos (Inia geoffrensis) are currently provisioned for use in tourist attractions in five sites in the Brazilian Amazon. Despite the known negative effects associated with human-wild dolphin interactions, this activity has been regulated and licensed in the Anavilhanas National Park in Novo Airão, Amazonas State, Brazil. We present an updated evaluation of the perception of the local community concerning the possible socioeconomic impacts of this tourism in Novo Airão. In April 2011, 45 interviews were conducted with inhabitants. A small segment of Novo Airão perceives currently itself as being economically dependent on the botos feeding tourism. Despite that, the economic benefits of this controversial activity apparently are not shared among most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Anavilhanas National Park; Artificial feeding; Boto; Inia geoffrensis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401577 |
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| 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 |
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| Pimentel,Alyne Daniele Alves; Absy,Maria Lucia; Rech,André Rodrigo; Abreu,Vanessa Holanda Righetti de. |
| ABSTRACT Insect pollination has influenced the evolution and diversification of angiosperms. Consequently, knowing plants used as food sources by bees, the most important pollinator group, is the first step toward understanding how their ecological relationships works. Pollen source information is also highly relevant for bee management and associated fruit and seed production. Accordingly, to improve understanding of the trophic ecology of these bees and their relationships with native Amazonian plants the current study identified, quantified and compared pollen stored in nests of Frieseomelitta stingless bees along the Rio Negro, Amazonas, Brazil. A total of 31 pollen pots were sampled and found to contain 65 pollen types distributed across 52 genera and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Feeding behavor; Meliponicultura; Stingless bees; Trophic resources. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200371 |
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| CAMPOS,DANIELA CAVALCANTE DOS SANTOS; NEVES,LEANDRO TIMONI BUCHIDID CARMAGO; FLACH,ADRIANA; COSTA,LUIZ ANTONIO MENDONÇA ALVES; SOUSA,BEATRIZ OLIVEIRA DE. |
| ABSTRACT This study evaluated the post-acidification, stability of anthocyanins and antioxidant activity in açai yogurts and fermented milks for 28 days of cold storage. For the determination of post-acidification and stability of the functional properties of açai yogurt (IA) and fermented milks (LFA), products stored at 4°C were evaluated on day 0 and every 7 days for pH, titratable acidity in lactic acid, instrumental color, anthocyanins and antioxidant activity by the DPPH free radical method. Acidification of both food matrixes was more evident between days 0 and 7 of evaluation. IA presented reduction in parameter L *, while chromaticity a * and b * of IA and LFA increased as the Açai pulp content increased; however, considering the evaluation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy products; Functional foods; Native fruits; Amazon. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500101 |
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| 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 |
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| FIGUEIREDO,Symone Maria de Melo; VENTICINQUE,Eduardo Martins; FIGUEIREDO,Evandro Orfanó; FERREIRA,Evandro José Linhares. |
| Species distribution modeling has relevant implications for the studies of biodiversity, decision making about conservation and knowledge about ecological requirements of the species. The aim of this study was to evaluate if the use of forest inventories can improve the estimation of occurrence probability, identify the limits of the potential distribution and habitat preference of a group of timber tree species. The environmental predictor variables were: elevation, slope, aspect, normalized difference vegetation index (NDVI) and height above the nearest drainage (HAND). To estimate the distribution of species we used the maximum entropy method (Maxent). In comparison with a random distribution, using topographic variables and vegetation index as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modeling; Maxent; Forest inventory; Modeflora; Amazon. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200167 |
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| Ribeiro,Rafael C; Lemos,Walkymário P; Bernardino,Aline S; Buecke,Joel; Müller,Antonio A. |
| The oil palm Elaeis guineensis is usually attacked by pests, particularly, defoliating caterpillars. Between 2004 and 2006 a stinkbug predator (Asopinae) was registered preying on caterpillars of Brassolis sophorae L., Opsiphanes invirae Hübner (Lepidoptera: Nymphalidae) and Sibine spp. (Lepidoptera: Limacodidae), reducing their populations in commercial oil palm plantations in the State of Pará, Brazil. Specimens of the natural enemy were collected, mounted, and identified as Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae), corresponding to the first report of the occurrence of this stinkbug attacking defoliating caterpillars of oil palm in Brazil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Asopinae; Biological control; Defoliator; Palm tree. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000100018 |
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| Brazil will benefit if it gains control of its vast Amazonian timber resources. Without immediate planning, the fate of much of the Amazon will be decided by predatory and largely unregulated timber interests. Logging in the Amazon is a transient process of natural resource mining. Older logging frontiers are being exhausted of timber resources and will face severe wood shortages within 5 yr. The Brazilian government can avoid the continued repetition of this process in frontier areas by establishing a network of National Forests (Florestas Nacionais or Flonas) to stabilize the timber industry and simultaneously protect large tracts of forest. Flonas currently comprise less than 2% of the Brazilian Amazon (83,000 km2). If all these forests were used for... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Amazon; Brazil; GIS model; Conservation; Logging; National forest; Production forest; Sustainable management; Tropical forest. |
| Ano: 2002 |
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| Registros recuperados: 239 | |
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