Consulta: subjectFacets:"Amazon"
Registros recuperados: 239
Data/hora: 09/06/2024 10:26:24

QUALITY OF Genipa Spruceana STEYERM SEEDLINGS SUBMITTED TO FERTIGATION
Provedor de dados: 196
Autores: de Souza, Luciano Maria; Saragosa Rossi, Fernando; Caione, Gustavo; Gomes Oliveira, Pedro Paulo; Bertolino, Nayara.
Jenipapo (Genipa spruceana) é uma espécie nativa da Amazônia que possui grande potencial na produção de mudas para reflorestamento. O objetivo desse estudo foi avaliar o efeito de doses de nutrientes aplicadas por meio de fertirrigação na qualidade de mudas de Genipa spruceana. O delineamento experimental foi inteiramente casualizado com cinco repetições, totalizando sete tratamentos. Os tratamentos foram: testemunha (sem fertilização); 900 mg N   L-1 e 750 mg K L-1 com e sem micronutrientes; 1800 mg N L-1 e 1500 mg K L-1 com e sem micronutrientes, 3600 mg N L-1 e 3000 mg K L-1 com e sem micronutrientes. O experimento foi conduzido em casa de vegetação por 35 dias. Em seguida, foram avaliadas as seguintes variáveis: diâmetro do caule, altura da parte...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Dickson Quality Index; Forest essences; Amazonas; Essência da floresta; Produção de mudas.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6815

Priority Areas for Establishing National Forests in the Brazilian Amazon
Provedor de dados: 7
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

The role of strong-tie social networks in mediating food security of fish resources by a traditional riverine community in the Brazilian Amazon
Provedor de dados: 7
Autores: Fillion, Myriam; Centro de Desenvolvimento Sustent&amp;#225;vel, Universidade de Bras&amp;#237;lia; Centre de recherche interdisciplinaire sur le bien-&amp;#234;tre, la sant&amp;#233;, la soci&amp;#233;t&amp;#233; et l&amp;#8217;environnement (CINBIOSE), Universit&amp;#233; du Qu&amp;#233;bec &amp;#224; Montr&amp;#233;al; Department of Biology, University of Ottawa; fillion.myriam@uqam.ca; Saint-Charles, Johanne; Centre de recherche interdisciplinaire sur le bien-&amp;#234;tre, la sant&amp;#233;, la soci&amp;#233;t&amp;#233; et l&amp;#8217;environnement (CINBIOSE), Universit&amp;#233; du Qu&amp;#233;bec &amp;#224; Montr&amp;#233;al; Facult&amp;#233; de communication, Universit&amp;#233; du Qu&amp;#233;bec &amp;#224; Montr&amp;#233;al; saint-charles.johanne@uqam.ca; Mongeau, Pierre; Facult&amp;#233; de communication, Universit&amp;#233; du Qu&amp;#233;bec &amp;#224; Montr&amp;#233;al; mongeau.pierre@uqam.ca; Mergler, Donna; Centre de recherche interdisciplinaire sur le bien-&amp;#234;tre, la sant&amp;#233;, la soci&amp;#233;t&amp;#233; et l&amp;#8217;environnement (CINBIOSE), Universit&amp;#233; du Qu&amp;#233;bec &amp;#224; Montr&amp;#233;al; mergler.donna@uqam.ca.
Social networks are a significant way through which rural communities that manage resources under common property regimes obtain food resources. Previous research on food security and social network analysis has mostly focused on egocentric network data or proxy variables for social networks to explain how social relations contribute to the different dimensions of food security. Whole-network approaches have the potential to contribute to former studies by revealing how individual social ties aggregate into complex structures that create opportunities or constraints to the sharing and distribution of food resources. We used a whole-network approach to investigate the role of network structure in contributing to the four dimensions of food security: food...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Common property regimes; Community-based management; Fish consumption; Food security; Mercury; Natural resource management; Social networks; Strong ties.
Ano: 2015

Temporal Stability in Fishing Spots: Conservation and Co-Management in Brazilian Artisanal Coastal Fisheries
Provedor de dados: 7
Autores: Begossi, Alpina; Unicamp; alpina@unicamp.br.
The management of small-scale artisanal fisheries in Brazil should be a priority because of their importance as a source of food for internal markets and their location in sites with high biodiversity, such as the Atlantic Forest coast. Fishing spots, territories, and sea tenure have been widely studied within artisanal fisheries, and, in this study, a fishing spot of this type may be a defended area or an area that imposes rules for users, making the exclusion of outsiders feasible, or even a place in which fishing occurs with some exclusivity. This analysis takes into account the importance of fishing areas for the conservation of artisanal fishing in Brazil and the relative temporal stability of these areas. In particular, examples of the use of the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Artisanal fisheries; Amazon; Atlantic Forest coast  Brazil; Co-management; Territoriality; Fishing accords.
Ano: 2006

Science for the Poor: How One Woman Challenged Researchers, Ranchers, and Loggers in Amazonia
Provedor de dados: 7
Autores: Shanley, Patricia; Center for International Forestry Research (CIFOR); p.shanley@cgiar.org.
Tipo: Peer-Reviewed article
Palavras-chave: Amazon; Communication; Forestry; Impact; Nontimber forest products (NTFPs); Poverty; Social change; Women.
Ano: 2006

Beyond protein intake: bushmeat as source of micronutrients in the Amazon
Provedor de dados: 7
Autores: van Vliet, Nathalie; Center for International Forestry Research (CIFOR); vanvlietnathalie@yahoo.com; Schor, Tatiana; Geography Department, Universidade Federal do Amazonas; tschor@ufam.edu.br; Tellez, Leady; Independent consultant; leadyjot@hotmail.com.
Wild meat is critical for the food security and income of millions of people, especially for poor rural households. Its role as a primary source of macronutrients worldwide has been recognized, but there have been few attempts to evaluate the contribution of bushmeat consumption to micronutrient intake. This is so particularly in the context of nutritional transitions induced by modernization and globalization. Here, we calculated the role of bushmeat as a source of micronutrients in the diets of urban and peri-urban inhabitants within the Tres Fronteras (Peru, Brazil, Colombia) region in the Amazon. We gathered food intake data from 35 households using 3-day 24-h food recalls combined with food weighing. Additionally, we interviewed 105 households on food...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Bushmeat; Conservation; Food intake; Micronutrients; Nutrition.
Ano: 2015

Building local institutions for national conservation programs: lessons for developing Reducing Emissions from Deforestation and Forest Degradation (REDD+) programs
Provedor de dados: 7
Autores: Collen, Wain; International Institute for Industrial Environmental Economics (IIIEE), Lund University; PlanJunto; wain.collen@planjunto.ec; Krause, Torsten; Lund University Centre for Sustainability Studies; torsten.krause@lucsus.lu.se; Mundaca, Luis; International Institute for Industrial Environmental Economics (IIIEE), Lund University; luis.mundaca@iiiee.lu.se; Nicholas, Kimberly A.; Lund University Centre for Sustainability Studies; kimberly.nicholas.academic@gmail.com.
For programs that aim to promote forest conservation and poverty alleviation, such as Reducing Emissions from Deforestation and Forest Degradation (REDD+), the participation of indigenous communities is essential to meet program goals. Using Ostrom's theory of collective action for common pool resource management, we evaluated the institutions governing indigenous participation in the Programa Socio Bosque incentive-based conservation program in Ecuador. We conducted structured interviews with 94 members in 4 communities to assess community institutions for 6 of Ostrom's principles, using 12 measures we developed for the principles. We found substantial variation between communities in terms of their institutional performance. The best-performing community...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Common pool resource (CPR); Forest governance; Forest policy; Socio Bosque.
Ano: 2016

Bushmeat networks link the forest to urban areas in the trifrontier region between Brazil, Colombia, and Peru
Provedor de dados: 7
Autores: van Vliet, Nathalie; Center for International Forestry Research; vanvlietnathalie@yahoo.com; Jonhson Neves de Aquino, Lindon; Universidade Federal do Amazonas; lj.aquino@bol.com.br; Schor, Tatiana; Geography Department, Federal University of Amazonas; NEPECAB; tatiana.schor@gmail.com; Hernandez, Sara; Independent Expert in Environmental Economics; sarah-hernandez-p@hotmail.com; Nasi, Robert; Center for International Forestry Research; r.nasi@cgiar.org.
Recent studies have intended to quantify urban consumption and trade in Amazonian towns. However, little is still known about the different ways in which bushmeat is made available in urban areas, including commercial and noncommercial flows, and how those flows contribute to link forests to urban livelihoods. In this study we qualitatively describe the structure and functioning of bushmeat flows in terms of species, catchment area, stakeholders involved, and the motivations for their activity in the main towns of the Amazon trifrontier region between Brazil, Colombia, and Peru.  We show that bushmeat trade to urban areas exists under an organized but invisible commodity chain providing a source of income to about 195 persons. Bushmeat is made available...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Bushmeat; Exchange networks; Indigenous people; Trade; Urban areas.
Ano: 2015

The Relation Between Income and Hunting in Tropical Forests: an Economic Experiment in the Field
Provedor de dados: 7
Autores: Cardenas, Juan Camilo; Universidad de los Andes; jccarden@uniandes.edu.co.
Hunting in tropical forests is both a major cause of biodiversity loss and an important food source for millions of people. A question with important policy implications is how changes in income level affect how much people hunt. This study, which was carried out in an indigenous community in the Amazon, explored the relation between income and consumption of wild meat using an economic experiment in the form of a lottery, and involved the local people, not only as experimental subjects, but also in the interpretation of results. The results suggested that an increase in steady employment, rather than in income alone, may lead to the substitution of non-hunted foods for wild meat. The kind of social learning that participation in this type of economic...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Economic development; Experimental economics; Hunting; Income; Lottery; Participatory research; Tropical forest; Wild meat.
Ano: 2006

Reducing Emissions from Deforestation and Forest Degradation (REDD+): Transaction Costs of Six Peruvian Projects
Provedor de dados: 7
Autores: Paavola , Jouni; Centre for Climate Change Economics and Policy (CCCEP); Sustainability Research Institute, School of Earth and Environment, University of Leeds; j.paavola@leeds.ac.uk; Healey, John R.; School of Environment, Natural Resources and Geography, Bangor University ; j.healey@bangor.ac.uk; Jones, Julia P.G.; School of Environment, Natural Resources and Geography, Bangor University ; julia.jones@bangor.ac.uk; Baker, Timothy R.; School of Geography, University of Leeds; t.r.baker@leeds.ac.uk.
Reduced Emissions from Deforestation and Forest Degradation (REDD+) has received strong support as a major component of future global climate change policy. The financial mechanism of REDD+ is payment for the ecosystem service of carbon sequestration in tropical forests that is expected to create incentives for conservation of forest cover and condition. However, the costs of achieving emissions reduction by these means remain largely unknown. We assess the set-up, implementation, and monitoring costs, i.e., collectively the transaction costs, of six of the first seven REDD+ project designs from the Peruvian Amazon and compare them with established projects in Brazil and Bolivia. The estimated costs vary greatly among the assessed projects from US$0.16 to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Additionality; Amazon; Peru; REDD+; Set-up  implementation  and monitoring costs; Transaction costs.
Ano: 2013

REDD+ for the poor or the poor for REDD+? About the limitations of environmental policies in the Amazon and the potential of achieving environmental goals through pro-poor policies
Provedor de dados: 7
Autores: Pokorny, Benno; University of Freiburg; benno.pokorny@waldbau.uni-freiburg.de.
Once again, the international community focuses on the preservation of Amazonian forests, in particular through a bundle of initiatives grouped under the term of REDD+. Initially focusing on reducing carbon emissions, the REDD+ process became increasingly linked with developmental goals that represent the primary interest of all Amazon countries. In consequence, REDD+ can be seen as another attempt to achieve the twin goals of environmental protection and rural development, and consequently, relies on the strategies and tools of past efforts. Against this background, we explore past experiences with key strategies for environmental protection and poverty alleviation in the Amazon to critically reflect about the potential of REDD+ to contribute to...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Amazon; Development Policies; Forest Management; Poverty Alleviation; REDD+; Rural Development; Sustainability.
Ano: 2013

Effects of selective logging on large mammal populations in a remote indigenous territory in the northern Peruvian Amazon
Provedor de dados: 7
Autores: Bowler, Mark; San Diego Zoo Global Institute for Conservation Research; marktbowler@icloud.com; Puertas, Pablo E; FundAmazonia; Center for International Forestry Research; puertas118@hotmail.com; Kirkland, Maire; FundAmazonia; maire.kirkland@hotmail.co.uk; Bodmer, Richard; FundAmazonia; Durrell Institute of Conservation and Ecology (DICE), School of Anthropology and Conservation, University of Kent; R.Bodmer@kent.ac.uk.
We examined the effects of selective timber logging carried out by local indigenous people in remote areas within indigenous territories on the mammal populations of the Yavari-Mirin River basin on the Peru-Brazil border. Recent findings show that habitat change in the study area is minimal, and any effect of logging activities on large mammal populations is highly likely to be the result of hunting associated with logging operations. We used hunting registers to estimate the monthly and yearly biomass extracted during timber operations and to calculate the catch per unit effort (CPUE) in subsistence hunting in the community of Esperanza 2 to 5 years before logging activities started and 4 to 7 years after logging began. We also used line transects and the...
Tipo: Peer-Reviewed article
Palavras-chave: Amazon; Catch per unit effort; Hunting; Mammal density; Timber logging.
Ano: 2015

Evaluating the use of local ecological knowledge to monitor hunted tropical-forest wildlife over large spatial scales
Provedor de dados: 7
Autores: Peres, Carlos A.; School of Environmental Sciences, University of East Anglia, Norwich, UK; C.Peres@uea.ac.uk.
Monitoring the distribution and abundance of hunted wildlife is critical to achieving sustainable resource use, yet adequate data are sparse for most tropical regions. Conventional methods for monitoring hunted forest-vertebrate species require intensive in situ survey effort, which severely constrains spatial and temporal replication. Integrating local ecological knowledge (LEK) into monitoring and management is appealing because it can be cost-effective, enhance community participation, and provide novel insights into sustainable resource use. We develop a technique to monitor population depletion of hunted forest wildlife in the Brazilian Amazon, based on the local ecological knowledge of rural hunters. We performed rapid interview surveys to estimate...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Brazil; Game; Harvesting; Hunting; Interviews; Large mammals.
Ano: 2015

Deforestation and the Social Impacts of Soy for Biodiesel: Perspectives of Farmers in the South Brazilian Amazon
Provedor de dados: 7
Autores: Skutsch, Margaret; Centro de Investigaciones en Geografia Ambiental, Universidad Nacional Autonoma de Mexico; mskutsch@ciga.unam.mx.
Tipo: Peer-Reviewed article
Palavras-chave: Amazon; Biodiesel; Deforestation; Family farmers; Social impacts; Soy.
Ano: 2011

Resource Theft in Tropical Forest Communities: Implications for Non-timber Management, Livelihoods, and Conservation
Provedor de dados: 7
Autores: Duchelle, Amy E.; University of Florida; Center for International Forestry Research (CIFOR); a.duchelle@cgiar.org; Cronkleton, Peter; Center for International Forestry Research (CIFOR); p.cronkleton@cgiar.org; Kainer, Karen A.; University of Florida; kkainer@ufl.edu; Gezan, Salvador; University of Florida; sgezan@ufl.edu.
Increased devolution of forest ownership and management rights to local control has the potential to promote both conservation and livelihood development in remote tropical regions. Such shifts in property rights, however, can generate conflicts, particularly when combined with rapidly increasing values of forest resources. We explored the phenomenon of Brazil nut (Bertholletia excelsa) theft in communities in Western Amazonia. Through interviews with 189 Brazil nut collectors in 12 communities in Bolivia and Brazil and participation in the 2006 and 2007 harvests, we quantified relative income derived from Brazil nuts, reported nut thefts, and nut collection and management practices. We found a much greater incidence of reported Brazil nut thefts in Pando,...
Tipo: Peer-Reviewed Reports
Palavras-chave: Amazon; Bertholletia excelsa; Brazil nut; Community forest management; Land tenure; Non-timber forest products; NTFPs.
Ano: 2011

SPATIAL VARIABILITY IN LEAF ANALYSIS AND PRODUCTIVITY OF FERTIRRIGATED AÇAÍ
Provedor de dados: 70
Autores: Ribeiro,Felipe O.; Fernandes,Antonio R.; Matos,Gilson S. B. de; Lindolfo,Marcelo M.; Guedes,Rafael S.; Rodrigues,Graziele R.
ABSTRACT This study aimed to define management zones (MZs) for fertirrigated açaí cultivation, based on spatial variability of the foliar nutrients and productivity data. The work was carried out in an area of 5.75 ha of a 7-year crop, with 80 georeferenced sample points. Fresh fruit productivity and nutrient (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, and Zn) contents were determined. The average contents of macronutrients were considered adequate for adult açaí plants, and their spatial dependence associated with fruit productivity allowed the representation of their distributions through maps of variability. Through multivariate analysis, three main components were highlighted. These components explained 51.5 % of the total variability of the data, where PC1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Management zones; Multivariate analysis; Nutrient contents; Precision agriculture.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600800

Microbial diversity of soils on the banks of the Solimões and Negro rivers, state of Amazonas, Brazil
Provedor de dados: 74
Autores: Santos,Ellen Karla Nobre dos; Honda,Rubens Tomio; Nozawa,Sérgio Ricardo; Ferreira-Nozawa,Monica Stropa.
Analysis of bacterial diversity in soils along the banks of the Solimões and Negro rivers, state of Amazonas, Brazil, was by partial sequencing of the genes codifying the rDNA16S region. Diversity of operational taxonomic units (OTU) and of the divergent sequences obtained were applied in comparative analysis of microbiological diversity in the two environments, based on richness estimators and OTU diversity indices. The higher OTU diversity in the Solimões was based on the higher number of parameters that evoke this. The interaction between the nucleotide sequences of bacteria inhabiting the two riverine environments indicated that the two microrganism communities are similar in composition.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbiological diversity; Tropical soil biodiversity; 16S rDNA gene; Amazon; Molecular biology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000100019

Cytogenetic studies in fishes of the genera Hassar, Platydoras and Opsodoras (Doradidae, Siluriformes) from Jarí and Xingú Rivers, Brazil
Provedor de dados: 74
Autores: Milhomem,Susana Suely Rodrigues; Souza,Augusto Cesar Paes de; Nascimento,Aline Lira do; Carvalho Jr.,Jaime Ribeiro; Feldberg,Eliana; Pieczarka,Julio Cesar; Nagamachi,Cleusa Yoshiko.
We studied the karyotypes of Hassar cf. orestis and an undescribed Hassar species from the Jarí River and Opsodoras ternetzi, H. orestis and Platydoras cf. costatus from the Xingú River, all with 2n = 58. Constitutive heterochromatin is located in the centromere in most metacentric pairs; in some chromosomes this banding is not present, or it is located on the whole chromosome arm or in the distal regions. The NOR is located on a single biarmed pair at a distal region of the short arm in H. cf. orestis, H. orestis and P. cf. costatus at a distal region of the long arm in O. ternetzi and at a proximal region of the long arm in the Hassar species. In all species (except for Hassar sp.) the CMA3 analysis revealed a rich G-C region coincident with the NOR....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosomes; Amazon; Biodiversity; Siluriformes; Banding; Fluorochromes.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200017

Cytogenetic study of the giant otter Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae)
Provedor de dados: 74
Autores: Franco-de-Sá,Jorge Felipe Oliveira; Rosas,Fernando César Weber; Feldberg,Eliana.
The giant otter, Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae), was widely distributed in South America but stable populations are now only found in the Pantanal and Amazon regions and the species is classified as endangered. There is only one recognized species of giant otter, although two subspecies of doubtful value have also been cited in the literature. We present the first karyotype of four captive P. brasiliensis specimens, all of which posses 2n = 38 chromosomes as 14M+8SM+6ST+8A and one pair of sexual chromosomes. An heteromorphic secondary constriction, associated with the nucleolar organizer region (NOR), was seen on the long arms of chromosome pair 17. The C-banding technique revealed heterochromatin in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Aquatic mammals; Ariranha; Karyotype.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600011

Anoxia- and hypoxia-induced expression of LDH-A* in the Amazon Oscar, Astronotus crassipinis
Provedor de dados: 74
Autores: Almeida-Val,Vera Maria Fonseca; Oliveira,Alice Reis; Silva,Maria de Nazaré Paula da; Ferreira-Nozawa,Monica Stropa; Araújo,Roziete Mendes; Val,Adalberto Luis; Nozawa,Sérgio Ricardo.
Adaptation or acclimation to hypoxia occurs via the modulation of physiologically relevant genes, such as erythropoietin, transferrin, vascular endothelial growth factor, phosphofructokinase and lactate dehydrogenase A. In the present study, we have cloned, sequenced and examined the modulation of the LDH-A gene after an Amazonian fish species, Astronotus crassipinis (the Oscar), was exposed to hypoxia and anoxia. In earlier studies, we have discovered that adults of this species are extremely tolerant to hypoxia and anoxia, while the juveniles are less tolerant. Exposure of juveniles to acute hypoxia and anoxia resulted in increased LDH-A gene expression in skeletal and cardiac muscles. When exposed to graded hypoxia juveniles show decreased LDH-A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Fishes; Gene expression; RT-PCR; LDH-A; Hypoxia; Anoxia.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200025

Metabolic adjustments in Satanoperca aff. jurupari (Perciformes: Cichlidae)
Provedor de dados: 74
Autores: Chippari-Gomes,Adriana R.; Leitão,Marco Aurélio B.; Paula-Silva,Maria de Nazaré; Mesquita-Saad,Lenise S. B. de; Almeida-Val,Vera Maria F.
In this paper, we describe the enzyme levels and isozyme distribution in skeletal and heart muscle of Satanoperca aff. jurupari, (Cichlidae, subgroup Geophaginae). LDH and CS were measured in skeletal and heart muscle. Starch gel electrophoresis was used to determine the isozyme/allozyme patterns in different tissues; LDH, MDHs, PGM, PGI, ADH, G-6-PDH and SOD were screened for the numbers of loci, presence of alleles, and tissue specificity. The LDH/CS ratio in heart and skeletal muscle were 173.36 and 6.1, respectively, indicating anaerobic metabolism in the former and aerobic metabolism in the latter muscle. No inhibition by pyruvate (based on the ratios of LDH activity with 1 mM and 10 mM pyruvate) was detected in heart and skeletal muscle, indicating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cichlid; Plasticity; Metabolism; Enzymes; Amazon.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000100005

Cytotaxonomy and karyoevolution of the genus Crenicichla (Perciformes, Cichlidae)
Provedor de dados: 74
Autores: Benzaquem,Denise Corrêa; Feldberg,Eliana; Porto,Jorge Ivan Rebelo; Gross,Maria Claudia; Zuanon,Jansen Alfredo Sampaio.
Karyotypes of six cichlid species of the genus Crenicichla were investigated. The species C. cincta, C. inpa, C. reticulata, C. lugubris, and C. cf. johanna were collected from Amazon basin, and C. britskii was collected from the Paraná-Paraguai basin. All of the analysed species showed 2n = 48 chromosomes; however, C. cincta, C. lugubris, C. cf. johanna, and C. britskii had a karyotype formula of 8M-SM+40ST-A, FN = 56, while C. inpa and C. reticulata exhibited the formula 6M-SM+42ST-A, FN = 54. Analysis of active Ag-NORs revealed two NOR-bearing chromosomes in all species; however, theses cistrons were located on different chromosome pairs and/or in different chromosome locations in each species. This condition bears evolutionary significance, since it is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Karyotype; Pike cichlid; Chromosome marker; Amazon.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200016

Tomato progenies selection in Rondônia, Brazil
Provedor de dados: 75
Autores: Marques,Maria José; Vizú,Juliana de Fátima; da Silva Filho,Danilo F; Ticona-Benavente,César Augusto.
ABSTRACT This study aimed to select endogamic progenies of tomato cv. Yoshimatsu and to conduct a progeny test in the state of Rondônia. The experiment was carried out in a randomized block design with four replicates and eight plants per plot, spacing 1x0.5 m, with one stem. A significant variation was observed among the fifteen progenies for productivity (2.0-5.5 kg plant-1), seed mass with placenta (18-31.5 g fruit-1), number of fruits per plant (18.8-38.7) and soluble solids (3.4-4.2°Brix). No significant variation was noticed for fruit size, pericarp thickness, number of locules, pH, number of flowers and fruit set, though. P6 progeny showed to be the most productive one (110 t ha-1): average fruit mass was 142.5 g, salad type tomato, 7.5 locules,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Progeny test; Plant breeding; Amazon; Agronomical performance.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000100106

Seasonality, age structure and reproduction of Leptodactylus (Lithodytes) lineatus (Anura, Leptodactylidae) in Rondônia state, southwestern Amazon, Brazil
Provedor de dados: 76
Autores: Bernarde,Paulo Sérgio; Kokubum,Marcelo N. de C.
Leptodactylus(Lithodytes) lineatus (Schneider, 1799) is an Amazonian leaf litter frog considered rare or uncommon in several studies on anuran communities. Despite being a widely distributed frog in Amazonian forests, knowledge of the biology and ecology of this species is relatively scarce. This species has been reported to live in association with leaf-cutter ant nests (Atta spp.) during the breeding period. In this paper we present data on the seasonality of this species and some reproductive information gathered at a locality of Rondônia state, northwestern Brazil. Field work was carried out between April 2001 and March 2002, with the use of pitfall traps with drift fences as a survey method. Leptodactylus (L.) lineatus had a higher capture frequency...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leptodactylus (Lithodytes) lineatus; Amazon; Breeding period; Sexual dimorphism.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000400005

Primary forest management in Eastern Amazonia.
Provedor de dados: 14
Autores: EMBRAPA AMAZÔNIA ORIENTAL.
An evaluation for future research activities; Future actions: Dendrogene and jafa; Dendrogene; Nafa.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Dendrogene; Nafa; Genetic; Amazon; Embrapa Amazônia Oriental; Brasil.; Amazonia.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/995929

Agri S&amp;T: technological information for development.
Provedor de dados: 14
Autores: EMBRAPA.
bitstream/item/134591/1/Agri-ST-21.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Amazon; Conservation; Colored sunflower; Amaranth.; Agricultura; Curaua; Quinoa.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1029203

Conhecendo espécies de plantas da Amazônia: Tatapiririca (Tapirira guianensis Aubl. - Anacardiaceae).
Provedor de dados: 14
Autores: COSTA, C. C. da; GURGEL, E. S. C.; GOMES, J. I.; LUZ, C. L. da S.; CARVALHO, L. T. de; MARGALHO, L. F.; MARTINS-DA-SILVA, R. C. V.; MACIEIRA, A. P.; SOUZA, A. S. de.
bitstream/item/113924/1/COM-253.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Amazon; Plant; Tatapiririca.; Planta.; Amazonia.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1002821

Enriquecimento da capoeira: alternativa para exploração da pequena propriedade na Amazônia.
Provedor de dados: 14
Autores: OLIVEIRA, J. M. F. de.
Tipo: Folhetos
Palavras-chave: Brushwood; Amazon; Agricultura; Capoeira; Pequeno Produtor; Amazonia; Agriculture.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/688070

Stable oxygen and hydrogen isotopic tracers in Amazon shelf waters during Amasseds
Provedor de dados: 5
Autores: Karr, Jd; Showers, Wj.
A detailed hydrographic survey of the water column of the Amazon shelf was performed using stable oxygen and hydrogen isotopes to determine the source and fate of waters on the shelf. delta(18)O-H2O and deltaD measurements were made on water column samples from approximately 60 stations (three depths per station) which were each collected during four Amasseds (A Multidisciplinary Amazon Shelf SEDiment Study) cruises: I8909-August 1989, falling river discharge; I9002-March 1990, rising river discharge; I9004-May 1990, peak discharge: I9113-November 1991, minimum discharge. Isotopes were compared with salinity and temperature measurements in order to identify water masses and mixing. The characteristics (salinity, temperature, delta(18)O, deltaD and d) are...
Tipo: Text
Palavras-chave: Amazone; Isotopes; 18O; Deutérium; Hydrologie; Amazon; Isotope; O-18; Deuterium; Hydrography.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43321/42933.pdf

A Pan-Amazonian species delimitation: high species diversity within the genus Amazophrynella (Anura: Bufonidae)
Provedor de dados: 5
Autores: Rojas, Rommel R.; Fouquet, Antoine; Ron, Santiago R.; Hernandez-ruz, Emil Jose; Melo-sampaio, Paulo R.; Chaparro, Juan C.; Vogt, Richard C.; De Carvalho, Vinicius Tadeu; Pinheiro, Leandra Cardoso; Avila, Robson W.; Farias, Izeni Pires; Gordo, Marcelo; Hrbek, Tomas.
Amphibians are probably the most vulnerable group to climate change and climate-change associate diseases. This ongoing biodiversity crisis makes it thus imperative to improve the taxonomy of anurans in biodiverse but understudied areas such as Amazonia. In this study, we applied robust integrative taxonomic methods combining genetic (mitochondrial 16S, 12S and COI genes), morphological and environmental data to delimit species of the genus Amazophrynella (Anura: Bufonidae) sampled from throughout their pan-Amazonian distribution. Our study confirms the hypothesis that the species diversity of the genus is grossly underestimated. Our analyses suggest the existence of eighteen linages of which seven are nominal species, three Deep Conspecific Lineages, one...
Tipo: Text
Palavras-chave: Integrative taxonomy; Cryptic diversity; Species delimitation; Amphibians; Amazon.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00660/77219/78676.pdf

Brachyuran crab community structure and associated sediment reworking activities in pioneer and young mangroves of French Guiana, South America
Provedor de dados: 5
Autores: Aschenbroich, Adelaide; Michaud, Emma; Stieglitz, Thomas; Fromard, Francois; Gardel, Antoine; Tavares, Marcos; Thouzeau, Gerard.
This study in French Guiana evaluates the changes of crab assemblages and their bioturbation activities between mangrove early stages (pioneer and young mangrove) and within stages by taking their spatial heterogeneity (tidal channels, flat areas, pools) into account. The results show differences in crab assemblage structure between and within the early stages of mangrove in relation to microhabitat and sediment characteristics. The sediment reworking rates are a function of the biomass or density of particular species (Ucides cordatus, Uca cumulanta) and burrower functional groups. Crab species or functional interaction mediate changes in sediment reworking rates suggesting the need to consider entire benthic communities rather than single species. This...
Tipo: Text
Palavras-chave: Mangroves; Crabs; Community composition; Bioturbation; French Guiana; Amazon.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00350/46154/45852.pdf

Croton maasii (Euphorbiaceae), a new species from the western Amazon region
Provedor de dados: 16
Autores: Riina, R.; Berry, P.E.
Croton maasii, a new species from South America, is described and illustrated. The species is only known from terra firme forests of the extreme western Amazonian region, in W Brazil and adjacent E Peru. Croton maasii resembles C. pachypodus, a more abundant and widely distributed species in the Neotropics, but differs from it in its much smaller fruits, foliage colour, less dense leaf indumentum, and a more even position of the petiolar glands.
Tipo: Article / Letter to the editor
Palavras-chave: Amazon; Brazil; Croton; Euphorbiaceae; Peru; Taxonomy; Tropical South America.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/525654

First record of Anastrepha pseudanomala Norrbom (Diptera: Tephritidae) and its host in Brazil
Provedor de dados: 82
Autores: Jesus,Cristiane R de; Silva,Ricardo A da; Souza Filho,Miguel F de; Deus,Ezequiel G de; Zucchi,Roberto A.
Anastrepha pseudanomala Norrbom was reared in fruits of Couma utilis (Apocynaceae), and also collected in McPhail traps in Ferreira Gomes county, State of Amapá, Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fruit fly; Amazon; Couma utilis; Apocynaceae.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600036

Primeira ocorrência de Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) predando lagartas desfolhadoras do dendezeiro no estado do Pará
Provedor de dados: 82
Autores: 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

Frugivory by a stingless bee (Hymenoptera: Apidae)
Provedor de dados: 82
Autores: Peruquetti,Rui C; Costa,Luena da S M da; Silva,Valdirene S da; Drumond,Patrícia M.
Frugivory is not frequent among bees. Although stingless bees visit aged fruits for pulp, the use of fresh fruits is recorded only for Trigona hypogea Silvestri, a species that does not visit flowers. Here we report the occurrence of frugivory in Trigona amazonensis (Ducke), a flower-visiting stingless bee.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eusocial bee; Amazon; Neotropical bee; Trophic interaction.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600033

Diversity and distribution of orchid bees (Hymenoptera: Apidae) with a revised checklist of species
Provedor de dados: 82
Autores: Nemésio,André; Silveira,Fernando A.
The aim of this study was to investigate the diversity and distribution patterns of orchid bees (Euglossina). Cluster and correlation analyses were applied to data extracted from 28 orchid-bee surveys throughout the Neotropical Region. The 28 sampling sites were grouped in three main biogeographic areas that roughly correspond to the Amazonian Basin, the Atlantic Forest and Central America. These three regions, as well as subregions within each of them, correspond approximately to biogeographic components identified through phylogeny-based analyses for other bees and organisms. The Amazonian Forest as a whole has the richest fauna and the highest levels of endemism. The Atlantic Forest, on the other hand, showed the poorest fauna and the lowest levels of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Atlantic forest; Conservation; Neotropics; Taxonomy.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000600008

Age and growth of the Amazonian migratory catfish Brachyplatystoma rousseauxii in the Madeira River basin before the construction of dams
Provedor de dados: 83
Autores: Hauser,Marília; Doria,Carolina R. C.; Melo,Larissa R. C.; Santos,Ariel R.; Ayala,Daiana M.; Nogueira,Lorena D.; Amadio,Sidinéia; Fabré,Nídia; Torrente-Vilara,Gislene; García-Vásquez,Áurea; Renno,Jean-François; Carvajal-Vallejos,Fernando M.; Alonso,Juan C.; Nuñez,Jésus; Duponchelle,Fabrice.
ABSTRACT The goliath catfish Brachyplatystoma rousseauxii has crucial economical and ecological functions in the Amazon basin. Although its life history characteristics have been studied in the Amazon, there is little information in the Madeira River basin, which holds genetically distinct populations and where dams were recently built. Using fish collected in Bolivia, Brazil and Peru, this study provides a validation of growth rings deposition and details the growth patterns of B. rousseauxii in the Madeira before the dams’ construction. Age structure and growth parameters were determined from 497 otolith readings. The species exhibits two growth rings per year and sampled fish were between 0 and 16 years old. In the Brazilian portion of the basin, mainly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biannual rings; Goliath catfish; Life cycle; Otolith.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100217

Moenkhausia rubra, a new species from rio Juruena, upper rio Tapajós basin, Brazil (Characiformes: Characidae)
Provedor de dados: 83
Autores: Pastana,Murilo N. L.; Dagosta,Fernando C. P.
Moenkhausia rubra, new species, is described from the upper rio Juruena, rio Tapajós basin, Mato Grosso, Brazil. The new species is distinguished from its congeners, except M. hemigrammoidesand M. nigromarginata, by the dark pigmentation on the anteriormost rays of both dorsal and anal fins. Moenkhausia rubrais distinguished from the aforementioned species by the number of branched anal-fin rays 17-20 (vs. 20-25), presence of a dark blotch on the caudal peduncle extending to middle caudal-fin rays, absence of longitudinal black zigzag stripes between longitudinal rows of scales on body, and other details of coloration.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Moenkhausia nigromarginata; Neotropical fishes; Ostariophysi; Tetra.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000200389

Diet and trophic structure of the fish assemblage in the mid-course of the Teles Pires River, Tapajós River basin, Brazil
Provedor de dados: 83
Autores: Dary,Eurizângela P.; Ferreira,Efrem; Zuanon,Jansen; Röpke,Cristhiana P.
ABSTRACT This study was carried out in a section of the middle course of the Teles Pires River, a clear water river that drains ancient and highly eroded geological formations, and where five hydropower plants are planned or in construction. In this study we tested the hypothesis that local fish fauna is mainly sustained by autochthonous food resources, with modest changes in the trophic structure of fish assemblages along the hydrometric cycle. Sampling was performed every three months between July 2008 and May 2009 at seven sites distributed along a 50-km section of the river. Piscivores was the most representative group in terms of biomass, abundance and species richness, followed by herbivores, insectivores and omnivores. The trophic structure did not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Environmental impact; Food resources; Temporal dynamics; Trophic ecology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400201

Resource use by two electric fishes (Gymnotiformes) of the National Forest Saracá-Taquera, Oriximiná, Pará
Provedor de dados: 83
Autores: Soares,Bruno E.; Rosa,Daniela C. O.; Silva,Nathália C. S.; Albrecht,Miriam P.; Caramaschi,Érica P.
ABSTRACT Fishes of the order Gymnotiformes have high diversity of oral and head morphology, which suggests trophic specializations within each clade. The aim of this study was to describe resource use patterns by two fish species (Gymnorhamphichthys rondoni and Gymnotus coropinae) in the National Forest Saracá-Taquera, Oriximiná - Pará, analyzing microhabitat use, diet composition, feeding strategies, niche breadth and niche overlap. Stomach contents of 101 individuals (41 G. rondoni and 60 G. coropinae), sampled in 23 headwater streams were analyzed and volume of food items was quantified to characterize their feeding ecology. Gymnorhamphichthys rondoni was captured mainly on sandy bottoms, whereas G. coropinae in crevices. Both species had a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Diet overlap; Feeding; Microhabitat; Streams.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200204

Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil
Provedor de dados: 83
Autores: Tencatt,Luiz Fernando Caserta; Ohara,Willian Massaharu.
Abstract Two new species of Corydoras are described from the rio Madeira basin, Brazil. The intermediate long-snouted new species can be distinguished from its congeners by presenting the following combination of features: posterior margin of dorsal-fin spine with laminar serrations directed towards the origin of the spine; presence of two longitudinal black stripes on flanks; anterior portion of dorsal fin with sparse black chromatophores, not forming any conspicuous pattern; absence of a conspicuous black marbled coloration pattern on head; black spots on caudal fin, some spots arranged, forming transversal bars; and brownish dorsal-fin spine. The short-snouted new speciescan be distinguished from its congeners by the following combination of features:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Corydoradinae; Mato Grosso; Rio Aripuanã; Taxonomy.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100208

The influence of flood pulse on fish communities of floodplain canals in the Middle Solimões River, Brazil
Provedor de dados: 83
Autores: Sousa,Raniere G. C.; Freitas,Carlos E. de C.
The functioning of large river systems with adjacent floodplains is strongly influenced by the flood pulse. This phenomenon is the main structuring force for the biota, including fish communities that use floodplain environments for spawning, feeding, nursery and refuge. In floodplains and in the entire basin, the volume of water controls internal flows. During rising water, the high discharge of the river acts as a natural barrier to the canals that connect floodplain lakes and the Solimões River, because the water flows from river to lake. During the dry period, there is a reduction of discharge and the water flow is reversed or stationary. These canals are environments with distinct ecological characteristics such as differentiated limnology and water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Seasonality; Freshwater fish.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200013

Miniature catfishes of the genus Gelanoglanis (Siluriformes: Auchenipteridae): monophyly and the description of a new species from the upper rio Tapajós basin, Brazil
Provedor de dados: 83
Autores: Calegari,Bárbara B.; Reis,Roberto E.; Vari,Richard P.
Previously proposed synapomorphies for the genus Gelanoglanis of the catfish family Auchenipteridae are evaluated and four additional features involving the relationship between the mesethmoid and premaxilla, the very fleshy anterior portion of the snout, the lack of ossification of the second through fourth infraorbitals, and the incomplete poring of the lateral line are hypothesized as synapomorphic for the members of the genus. A new species of Gelanoglanis is described based on a series of specimens collected in the rio Teles Pires, a tributary of the rio Tapajós in the southern reaches of the Amazon basin. The new species demonstrates a number of features unusual within Gelanoglanis including a fontanel bordered by the frontals, a particularly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Endemism; Neotropics; Systematics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000400699

Phylogenetic relationships of the species of Acestridium Haseman, 1911 (Siluriformes: Loricariidae)
Provedor de dados: 83
Autores: Rodriguez,Mónica S.; Delapieve,Maria Laura S.; Reis,Roberto E.
A phylogeny of the species of the loricariid genus Acestridium and relevant outgroups is presented based on a parsimony analysis of 52 unweighted and unordered morphological characters. Acestridium is diagnosed as monophyletic based on the possession of the 17 exclusive synapomorphies. Two primary trees were found, and the strict consensus among those alternative trees resulted in the following relationships: ((A. dichromum + A. triplax)(A. gymnogaster + A. scutatum + (A. discus (A. colombiensis + A. martini)))). Acestridium was found to be sister to Niobichthys with this clade subsequently the sister-group to Oxyropsis + Hypoptopoma.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Evolution; Neotropical; Phylogeny.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200325

Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography
Provedor de dados: 83
Autores: Carvalho,Tiago P.; Albert,James S.
We redescribe Iracema caiana, a monotypic genus of the gymnotiform electric fish family Rhamphichthyidae. Iracema is known only from the type series (holotype and three paratypes) collected from the rio Jauaperi, affluent to the rio Negro in the Amazon basin, and was never collected again. Previous morphological studies were limited to features of external morphology. To study the osteology of Iracema we examined two specimens of different sizes using high-resolution x-ray computed tomography, a non-invasive and non-destructive technique to visualize internal anatomical structures. We describe and illustrate the osteology of Iracema caiana, and present data on morphometrics and external morphology. Contrary to previous hypotheses we propose that Iracema is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Guiana Shield; Osteology; Rare fish; Rhamphichthys.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300001

A new species of Poptella (Characiformes: Characidae: Stethaprioninae) from the Rio Juma, Rio Madeira basin, Brazil
Provedor de dados: 83
Autores: Garcia-Ayala,James R.; Benine,Ricardo C.
ABSTRACT A new species of Poptella is described from the Rio Juma, a tributary of the lower Rio Aripuanã, Rio Madeira basin, Amazonas, Brazil. The new species is distinguished from all congeners, except P. brevispina, by having a lower number of scale rows between the lateral line and dorsal-fin origin (7 vs. 8-10). The new species can be readily distinguished from P. brevispina by the lower number of branched dorsal-fin rays (9 vs. 10). This is the first description of a new species of Poptella since the revisionary study of the Stethaprioninae, published 30 years ago.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Freshwater fish; Stethaprionini; Taxonomy.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200202

Feeding ecology of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) in a riparian flooded forest of Eastern Amazonia, Brazil
Provedor de dados: 83
Autores: Freitas,Tiago Magalhães da Silva; Almeida,Vitor Hudson da Consolação; Valente,Roberta de Melo; Montag,Luciano Fogaça de Assis.
Feeding habits of the midnight catfish Auchenipterichthys longimanus collected in rivers of the Caxiuanã National Forest (Eastern Amazonia, Brazil) were investigated through the different hydrological periods (dry, filing, flood and drawdown). A total of 589 specimens were collected throughout seven samplings between July 2008 and July 2009, of which 74 were young males, 177 adult males, 89 young females and 249 adult females. The diet composition (Alimentary index - Ai%) was analyzed by a non-metric multidimensional scaling (nMDS) and by the analysis of similarity (ANOSIM), which included 37 items grouped into nine categories (Aquatic insects, Other aquatic invertebrates, Arthropods fragment, Fish, Plant fragment, Seeds, Terrestrial insects, Other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Catfish; Hydrological seasons; Trophic ecology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300016

A new species of Gymnotus (Gymnotiformes: Gymnotidae) from the Fitzcarrald Arch of southeastern Peru
Provedor de dados: 83
Autores: Maxime,Emmanuel L.; Albert,James S.
Herein Gymnotus chaviro is described from the Alto Yuruá (upper rio Juruá) of southeastern Peru, where it is locally abundant in terra firme streams and floodplain oxbow lakes, and occurs sympatrically and syntopically with the type species of the genus G. carapo. The new species is diagnosed by a unique combination of morphometric, meristic, and osteological traits, and a characteristic color pattern in which the dark band-pairs are unbranched and incompletely separated, and the pale inter-bands rarely reach to the dorsal mid-line on the anterior half of the body, being crescent-shaped in abdominal area. Gymnotus chaviro is a member of the G. carapo species group, with which it shares the presence of two pores in the dorsolateral portion of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Electric fish; Neotropical fish.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400004

A new species of Panaqolus (Siluriformes: Loricariidae) from the rio Madeira basin with remarkable intraspecific color variation
Provedor de dados: 83
Autores: Cramer,Christian Andreas; Py-Daniel,Lúcia Helena Rapp.
The rio Madeira is the largest white-water tributary of the Amazon, and is currently the river drainage with the highest fish species diversity in the world. A new species of Panaqolus was recognized from the middle Madeira and Mamoré rivers (Brazil) and from the Madre de Dios drainage (Peru) and it is described herein. This new species is readily distinguished from its congeners by the large number of white dots distributed all over the body and by its remarkable amplitude of color pattern variation, ranging from a pale, light brown, to dark brown and almost black background coloration. The new species closely resembles P. albomaculatus but has more and smaller dots on the body, a smaller orbital diameter (12.5-16.8% head length vs. 16.0-20.0%) and longer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Catfish; Key of identification; Panaque; Peckoltia.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300461

Corydoras tukano, a new species of corydoradine catfish from the rio Tiquié, upper rio Negro basin, Brazil (Ostariophysi: Siluriformes: Callichthyidae)
Provedor de dados: 83
Autores: Britto,Marcelo R.; Lima,Flávio C.T.
A new Corydoras species from the rio Tiquié, upper rio Negro system, Amazonas, Brazil, is described. This taxon was previously referred to as "Corydoras species 'Asher'", "Corydoras cf. reynoldsi", and "Corydoras aff. reynoldsi" in the aquarist literature. The new taxon can be distinguished from all its congeners, except Corydoras reynoldsi and C. weitzmani, by its color pattern, consisting of three large, dark blotches, the first one ("mask") on the head, across the eye; the second one on the trunk at the level of dorsal fin; and the third one on the trunk at the level of the adipose fin. It can be distinguished from Corydoras reynoldsi mainly by the development of trunk blotches; and from C. weitzmani by the presence of a dusky saddle between the dorsal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corydoras reynoldsi; Corydoras weitzmani; Neotropical; Amazon.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252003000200002

Ecology of Mylesinus paucisquamatus Jégu &amp;amp; Santos, 1988, an endangered fish species from the rio Tocantins basin
Provedor de dados: 83
Autores: Vitorino Júnior,Oscar B.; Agostinho,Carlos S.; Pelicice,Fernando M.
ABSTRACT Mylesinus paucisquamatus is a threatened fish endemic to the rio Tocantins basin, with little information about its natural history. Using monitoring data obtained between 1998 and 2009, we investigated the spatial distribution, feeding and reproduction of this species in a long stretch of the middle-upper rio Tocantins. Eighty-one individuals were captured over a decade of intensive sampling. In addition, we recorded the species in only 13 out of 35 sites, particularly in the Tocantins and Paranã rivers. Most individuals were captured alone, while the remaining formed small groups. These results indicate that this fish is rheophilic and rare. We recorded seasonal variation in fish abundance, with higher values during the dry season, indicating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Conservation; Rare species; Rheophilic; River regulation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200204

Diet of Bryconops alburnoides and B. caudomaculatus (Osteichthyes: Characiformes) in the region affected by Balbina Hydroelectric Dam (Amazon drainage, Brazil)
Provedor de dados: 83
Autores: Silva,Cylene C. da; Ferreira,Efrem J. G.; Deus,Cláudia P. de.
The study of fish diet and its interaction with the environment provides important data on ecology and behavior, as fish face varying environmental and food availability conditions. The aim of the present study was to determine the diet of Bryconops caudomaculatus and Bryconops alburnoides, as well as to assess its seasonal variation, within the area influenced by Balbina Hydroelectric Dam (BHD), in the Uatumã River (Amazon Basin, Brazil). Collections were carried out every two months from April 2005 to February 2007, using gill nets with mesh sizes ranging from 12 to 60 mm between opposite knots. Two methods were used for determining diet: frequency of occurrence and relative volume, which were used to calculate the alimentary index (IAi). Diet similarity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feeding ecology; Reservoir; Amazon; Environmental impact.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200011

Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
Provedor de dados: 83
Autores: Santos,Nayara Barbosa; Rocha,Rossineide Martins da; Fredóu,Flávia Lucena.
Plagioscion magdalenae (pacora) is a commercially important benthopelagic sciaenid and widely distributed in the Amazon River basin. The present study describes the reproductive biology of this species in the bay of Marajo, Amazon Estuary, Brazil. The gonadal development stage, age and size at first sexual maturity (L50), sex ratio, and reproductive strategy were determined. The data were collected bi-monthly from December 2005 to October 2006. A total of 251 specimens were examined, with the total length (TL) ranging between 220 and 590 mm. The weight-length relationship for females, males and grouped sexes was highly significant, showing a positive allometry. The L50 was of 279 mm for grouped sexes, with 305 mm and 269 mm TL for females and males...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproduction; Amazon; Length maturity; Sexual proportion.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000200012

Spawning areas, dispersion and microhabitats of fish larvae in the Anavilhanas Ecological Station, rio Negro, Amazonas State, Brazil
Provedor de dados: 83
Autores: Oliveira,Edinbergh C. de; Ferreira,Efrem J. G.
The abundance and distribution of ichthyoplankton and their relationships to current velocity, temperature, dissolved oxygen, pH and electrical conductivity of the water in the Anavilhanas Ecological Station, Negro River, Amazonas State, Brazil, were analyzed. Preferred microhabitats for spawning, dispersion and nursery were also verified. Sampling was undertaken during the falling water period of 2001 and the rising water period of 2002, in a section of 100 km subdivided into 5 subsections, with a total of 20 stations (5 beaches, 5 ravines, 5 channels, and 5 lake channels) at night and during the day at the surface and at the bottom. 647 eggs and 4,187 larvae were captured, belonging to 10 families and four orders: Characiformes (6), Siluriformes (2),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyoplankton; Black water; Reproduction; Protected Areas; Amazon.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400003

Taxonomic revision of the deep channel electric fish genus Sternarchella (Teleostei: Gymnotiformes: Apteronotidae), with descriptions of two new species
Provedor de dados: 83
Autores: Evans,Kory M.; Crampton,William G. R.; Albert,James S.
ABSTRACT This paper provides a taxonomic revision of the Neotropical electric fish genus Sternarchella, with redescriptions of seven valid species and descriptions of two new species. A maximum parsimony analysis of 76 morphological characters from seven ingroup and seven outgroup taxa recovered a non-monophyletic Sternarchella, in which a clade comprising two species with a ventral mouth (S. orinoco + S. sima) is the sister group to a clade comprising seven species that possess a terminal or superior mouth. Nested within this higher-diversity clade is the genus Magosternarchus (recognized herein as a junior synonym of Sternarchella) comprising M. duccis and M. raptor. The Magosternarchus clade forms a polytomy with S. orthos and S. schotti. Sternarchella...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Evolution; Geometric morphometrics; Identification key; Magosternarchus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200210

A history of the biogeography of Amazonian fishes
Provedor de dados: 83
Autores: Dagosta,Fernando C. P.; Pinna,Mário C. C. de.
ABSTRACT The history of knowledge about Amazonian biogeography is as rich as its fish community, and a fascinating theme of study in itself. Several current paradigms and controversies about Amazonian fish biogeography are rooted in principles dating from the second half of the 18th to the first half of the 19th centuries. The present work establishes a relationship between current biogeographical ideas and their old predecessors, on the basis of a chronologically-oriented historical continuity analysis. The advent of evolutionary theory has not contributed significantly to a transformation of the knowledge on the biogeography of Amazonian fishes. On the other hand, the two main schools of biogeographical thought (dispersalist and vicariant) had major...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Ichthyology; Neotropical; South America.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000300303

New characid fish, Hyphessobrycon scutulatus, from the rio Teles Pires drainage, upper rio Tapajós system (Ostariophysi: Characiformes: Characidae)
Provedor de dados: 83
Autores: Lucena,Carlos Alberto Santos de.
A new species of characid fish, Hyphessobrycon scutulatus, is described from the rio Teles Pires drainage, upper rio Tapajós system. The new species is distinct from all Hyphessobrycon species by the following characters: inner row premaxillary teeth 7 or 8, all tricuspid; maxilla with 5 to 9 tricuspid teeth; horizontal lateral body stripe or humeral mark absent; and a spot centered on the basal portion of the median caudal-fin rays sometimes extends to the distal portions of those rays.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical; Amazon; Taxonomy; Fishes.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252003000200003

Two new species of Hyphessobrycon (Teleostei: Characidae) from upper rio Tapajós basin on Chapada dos Parecis, central Brazil
Provedor de dados: 83
Autores: Carvalho,Tiago Pinto; Bertaco,Vinicius Araújo.
Two new species of Hyphessobrycon are described from the upper rio Tapajós basin, Mato Grosso, Brazil. Hyphessobrycon melanostichos is distinguished from its congeners by the combination of a conspicuous longitudinal broad black band beginning on the posterior margin of orbit and reaching the tip of middle caudal fin rays, a distinct vertically elongate humeral spot, and 16 to 18 branched anal-fin rays. Hyphessobrycon notidanos is distinguished from its congeners by the combination of an elongate dorsal fin in mature males, a vertically elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and 16 to 21 branched anal-fin rays.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical; Characiformes; Amazon; Taxonomy; Endemism; Fish.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000300001

Centromochlus meridionalis, a new catfish species from the southern Amazonian limits, Mato Grosso State, Brazil (Siluriformes: Auchenipteridae)
Provedor de dados: 83
Autores: Sarmento-Soares,Luisa Maria; Cabeceira,Fernando G.; Carvalho,Lucélia Nobre; Zuanon,Jansen; Akama,Alberto.
Centromochlus actually comprises eleven species, being the most problematic genus among the Centromochlinae, including morphologically heterogeneous taxa. The Centromochlus species have a wide distributional area on northern South America. Centromochlus meridionalis, new species, is described from headwaters of rio Teles Pires, contributor of rio Tapajós, Mato Grosso State, Brazil, and represents one of the southernmost records of a centromochlin catfish for Meridional Amazon rivers. Centromochlus meridionalis is promptly distinguished from its congeners by the small orbital diameter (relative to head length), and also by the combination of absence of first nuchal plate, anterior margin of dorsal-fin spine smooth, six branched rays in anal fin, seven pairs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Centromochlinae; Forest streams; Taxonomy; Teles Pires.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400797

Parotocinclus halbothi, a new species of small armored catfish (Loricariidae: Hypoptopomatinae), from the Trombetas and Marowijne River basins, in Brazil and Suriname
Provedor de dados: 83
Autores: 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

A new species of Farlowella (Siluriformes: Loricariidae) of the F. nattereri species-group from the rio Xingu basin, Mato Grosso, Brazil, with comments on Farlowella jauruensis , a poorly-known species from the upper rio Paraguai basin
Provedor de dados: 83
Autores: Ballen,Gustavo A.; Pastana,Murilo N. L.; Peixoto,Luiz A. W.
ABSTRACT A new species of Farlowella is described from eighteen specimens collected in the upper rio Xingu basin, Mato Grosso State, Brazil. The new species is a member of the Farlowella nattereri species-group and can be distinguished from other members of the group, with exception of Farlowella jauruensis , by exhibiting a proportionally shorter snout. The new species is distinguished from F. jauruensis by differences on the cleithrum and plate morphology, by counts of pelvic and caudal-fin rays, and by the color pattern of the snout. The discovery of new lots of F. jauruensis , a species so far known only from the holotype, is also herein reported. This discovery represents a considerable expansion of the geographic distribution and of the number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Brazilian shield; Loricariinae; Neotropical fishes; Ostariophysi.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300215

Flight height of bostrichids (Coleoptera: Bostrichidae) collected in Tropical Semideciduous Forest, Mato Grosso, Brazil
Provedor de dados: 190
Autores: Peres Filho, Otávio; Barbosa, Janaína Iris; Souza, Marcelo Dias de; Dorval, Alberto.
The objective of this study was to determine the flight height of species of Bostrichidae family, as well as determine the faunistic index of species collected in Tropical Semideciduous Forest, in the period to April of 2000 at March of 2001, in Maracaí farm, located in the municipality of Sinop, Mato Grosso, Brazil. Seven heights with 21 ethanolic traps were tested, with three traps by height. The bait used was the commercial alcohol and the collects were proceeded every fifteen days, and latter on monthly. The material collected was identified by comparison with specimens of the Forest Protection laboratory collection, from the Federal University of Mato Grosso. Were collected 141 individuals from five species: Bostrychopsis uncinata, Micrapate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Woodborer; Powder beetles; Amazon; Flight height Coleobrocas; Besouros pulverizadores; Amazônia legal; Altura de voo.
Ano: 2012
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/296

Sucessão ecológica de um trecho de Floresta Ombrófila Densa de Terras Baixas, Carauari, Amazonas
Provedor de dados: 190
Autores: Lima, Rosival Barros de Andrade; Silva, José Antônio Aleixo da; Marangon, Luiz Carlos; Ferreira, Rinaldo Luiz Caraciolo; Silva, Roseane Karla Soares da.
O presente trabalho foi realizado em um trecho de Floresta Ombrofila Densa de Terras Baixas no Municipio de Carauari, Amazonas, tendo como objetivo estimar a composicao floristica do estrato arboreo e classificar as especies nos respectivos grupos ecologicos, a fim de se obter informacoes sobre a atual situacao do fragmento florestal, para embasar estrategias de conservacao e preservacao, bem como embasar a formulacao de pesquisas que visem a disseminacao do conhecimento e sua aplicacao na producao sustentavel. O inventario florestal foi realizado em uma area de 275 ha, cortada por tres transectos (822 m, 1.265 m e 2.349 m), totalizando 4.436 m. Foram instaladas parcelas de 20 m x 25 m, equidistantes a cada 50 m e intercaladas a direita e a esquerda da...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Floristic; Ecological groups Amazônia; Florística Grupos; Ecológicos.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/261

A new species of Leptometopa Becker, 1903 (Diptera, Milichiidae) and an identification key for the neotropical species of the genus
Provedor de dados: 84
Autores: Mello,Ramon Luciano de; Rodrigues,Paula Fernanda Motta; Lamas,Carlos José Einicker.
The Milichiidae family includes species of small acalyptratae flies distributed into 19 genera, over all biogeographic regions. The genus Leptometopa Becker, 1903, positioned among the Madizinae, is distributed worldwide. The genus is composed of 19 species, of which three are recorded for the Neotropical region: L. halteralis (Coquillett, 1900), L. latipes (Meigen, 1830) and L. niveipennis (Strobl, 1898). Studying material collected in a cave of Amazonas State, Brazil, the authors found a new species of Leptometopa which is described and illustrated herein. The new species L. veracildae n. sp. represents the first record of the genus in South America. An identification key for all Neotropical species is also presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Madizinae; Microtomentum; Cave; Amazon; South America.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492007002700001

On Brazilian Helobata Bergroth, 1888 (Coleoptera: Hydrophilidae) II: new distribution data
Provedor de dados: 84
Autores: Clarkson,Bruno; Almeida,Lúcia M.
Abstract As an add-on to the work of Clarkson et al. (2016), new distributional data on species of Helobata Bergroth, 1888 (Hydrophilidae: Acidocerinae) from Brazil is provided. Helobata amazonensis Clarkson, Santos &amp; Ferreira-Jr., 2016, is recorded for the first time for Roraima State and its female is recorded for the first time. Helobata quatipuru Fernández &amp; Bachmann, 1987 and H. larvalis (Horn, 1873) are recorded for the first time for Minas Gerais, Cerrado Biome area. The genus is recorded for the first time for Goiás State. Additions and modifications in the previously published key to Brazilian species are provided.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acidocerinae; Amazon; Cerrado; Hydrophiloidea; Neotropical Region.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100233

An overview of the ant fauna (Hymenoptera: Formicidae) of the state of Maranhão, Brazil
Provedor de dados: 84
Autores: Prado,Lívia Pires do; Feitosa,Rodrigo Machado; Triana,Stefania Pinzón; Gutiérrez,Jhonatan Andrés Muñoz; Rousseau,Guillaume Xavier; Silva,Raimunda Alves; Siqueira,Glécio Machado; Santos,Ciro Líbio Caldas dos; Silva,Francisco Veras; Silva,Thiago Sanches Ranzani da; Casadei-Ferreira,Alexandre; Silva,Rogério Rosa da; Andrade-Silva,Joudellys.
Abstract The state of Maranhão, located in northeastern Brazil, comprises three biomes: Amazonian, Caatinga, and the Cerrado. To date, 99 ant species have been recorded in the literature from the state. In the present work, we provide for the first time a profile of the ant fauna in the state based on data from the historical literature and Brazilian institutional collections. The updated records on ant diversity for the state of Maranhão revealed a total of 279 species, belonging to 71 genera and 10 subfamilies. In total, 180 species are recorded for the first time in the state, of which four species recorded for the first time in Brazil. In summary, apart from documenting the ant fauna of the region, these results provide a basis for further studies and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Distribution; Amazon; Caatinga; Cerrado; Checklist.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100238

Growth, biomass, and energy quality of Acacia mangium timber grown at different spacings
Provedor de dados: 86
Autores: Tonini,Helio; Schwengber,Dalton Roberto; Morales,Marina Moura; Magalhães,Ciro Augusto de Souza; Oliveira,Jane Maria Franco de.
Abstract: The objective of this work was to assess the effect of spacing on the growth, biomass allocation, and wood quality for energy purposes of Acacia magium. A randomized complete block design was carried out with three replicates and five treatments consisting of trees planted at different spacings: 2.0x2.0, 2.5x2.5, 3.0x2.0, 3.0x2.5, and 3.0x3.0 m. At 67 months after planting, the following species parameters were evaluated: performance (mortality, diameter growth, height, bark factor, and bark and biomass volume yield) and wood energy quality (basic density, higher-calorific value, ash, fixed carbon, and volatile materials) through the analysis of variance. Plant spacing did not affect volume and biomass production per hectare nor wood quality for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biomass accumulation; Energy productivity; Forest plantation; Roraima.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700791

Assessment of rubber tree panels under crowns resistant to South American leaf blight
Provedor de dados: 86
Autores: Moraes,Larissa Alexandra Cardoso; Moreira,Adônis; Fontes,José Roberto Antoniol; Cordeiro,Everton Rabelo; Moraes,Vicente Haroldo de Figueiredo.
The objective of this work was to assess the performance of panel clones under crowns resistant to South American leaf blight (Microcyclus ulei). The experiment was carried out with 18 panel clones crown-budded with Hevea pauciflora x H. guianensis, in a Xanthic Ferralsol (Oxisol) in Manaus, AM, Brazil. The following parameters were evaluated: dry rubber yield, plant nutritional status, and anatomical and physiological characteristics of the latex vessels. In the first three years of evaluation, the panel clones IAN 2878, IAN 2903, CNS AM 7905, CNS AM 7905 P1, and PB 28/59 showed the highest dry rubber yield potential, while the clones IAN 6158, IAN 6590, and IAN 6515 should not be recommended for crown budding. Higher potassium and copper foliar content...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hevea; Microcyclus ulei; Amazon; Crown budding; Nutritional status.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000500003

Artificial neural network for ecological-economic zoning as a tool for spatial planning
Provedor de dados: 86
Autores: Sadeck,Luis Waldyr Rodrigues; Lima,Aline Maria Meiguins de; Adami,Marcos.
Abstract: The objective of this work was to analyze social and environmental information through an artificial neural network-self-organizing map (ANN-SOM), in order to provide subsidy to ecological-economic zoning (EEZ) as a tool to reduce the subjectivity of the process. The study area comprises 16 municipalities in the northeast of the state of Pará, Brazil, representative of the agricultural development in the state. Data processing involved three steps: preparation of the data in a geographic information system (GIS) environment; mathematical processing (ANN-SOM) of the data; and visualization and interpretation of the processing results, allowing the spatial planning of northeastern Pará. The results comprised 13 classes, regrouped according to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Regional planning; Regionalization; Self-organizing maps.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101050

Biofilter efficiency of Eichhornia crassipes in wastewater treatment of fish farming in Amazonia: Eficiencia de Eichhornia crassipes como biofiltro en el tratamiento de aguas residuales de la piscicultura en el Amazonas
Provedor de dados: 85
Autores: Rubim,MAL; Isolino Sampaio,PR; Parolin,P.
Fish is a very important part of the human diet in Amazonia. Near the growing cities, fish populations and individual size have decreased over the past decades. Alternatives to traditional and industrial fishing arise, including fish farming. Strategies to minimize the impact of fish farms on the environment are needed to have a regular and healthy fsh supply. This is to avoid a reduction of biodiversity, a depletion of natural resources, and/or the induction of significant changes in the structure and functioning of adjacent ecosystems. Very little research has been performed on management of efluents as to maintain the quality of water resources. The present study aimed at testing the efficiency of the Amazonian aquatic macrophyte Eichhornia crassipes as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Amazon; Effluent; Fish farming; Biofilters; Aquatic macrophytes; Water hyacinth.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100031

A AMAZONIA E O MERCADO DE CARBONO
Provedor de dados: 31
Autores: Lamarca Junior,   Mariano Rua; Chalita,   Marie Anne Najm; Godoy,   Amalia Maria Goldberg; Silva,   Cesar Roberto Leite da.
A Amazônia tem um destacado papel na crise ambiental global uma vez que, no Brasil,  há mais emissões de carbono por o desmatamento e queimadas do que pela queima de combustíveis de origem fóssil. Para discutir a problemática e a importância da inserção da Amazônia no mercado de carbono, parte-se dos processos de ocupação e uso dos recursos naturais da floresta e das contradições na formulação das políticas para a região. Com base nos conceitos de direitos de propriedade, direitos econômicos e rede social demonstra-se que a política atual de gestão e concessão da floresta pode também ancorar-se no mercado de carbono para agir diretamente sobre o caráter ilegal e clandestino das atividades que depredam a floresta e diminuir os conflitos existentes. Esta...
Tipo: Conference Paper or Presentation
Palavras-chave: Amazônia; Mercado de carbono; Desenvolvimento sustentável; Amazon; Carbon market; Sustainable development; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/109111

PECUÁRIA E DESMATAMENTO: MUDANÇAS NO USO DO SOLO EM RONDÔNIA
Provedor de dados: 31
Autores: 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

The Impact of Settlement Design on Tropical Deforestation Rates and Resulting Land Cover Patterns
Provedor de dados: 31
Autores: Caviglia-Harris,   Jill L.; Harris,   Daniel.
Policymakers in the Brazilian Amazon face the challenge of meeting environmental and developmental goals as cities and towns within these tropical forests continue to face migration pressure. Alternative government planning strategies have been implemented to address forest clearing in conjunction with meeting social agendas. This paper uses panel estimation methods to investigate the impact of settlement design on land use. Results indicate that new settlement designs developed to further social interaction have had a negative impact on land cover and land use transformation. Thus, while new settlement designs appear to positively impact stated social goals, including greater contact between families and access to water and services, these social advances...
Tipo: Article
Palavras-chave: Deforestation; Land use/land cover change; Smart growth; Settlement design; Amazon; Brazil; Environmental Economics and Policy; Land Economics/Use.
Ano: 2011
URL: http://purl.umn.edu/120290

Análise do desempenho competitivo das agroindústrias de polpa de frutas do estado do Pará
Provedor de dados: 31
Autores: Santana,   Antonio Cordeiro de.
The objective of this paper was to determine and analyze the main competitive performance indicators of the pulp producing agro-industries of the local tropical fruits’ agricluster of the Metropolitan Region of Belém and Northeast of Pará. The competitive performance was evaluated by using ex-ante and ex-post indicators of the existing industrial organization. The results showed that the firms are operating with multiple objectives and most of them are obtaining significant indicators showing an increase in the productive capacity, profit’s margins, market share and employment. Finally, it is concluded that the firms of the fruits’ cluster are competitive at the local, national and international markets of pulp’s mix, composed by Amazon’s fruits and other...
Tipo: Journal Article
Palavras-chave: Agro-industry; Competitiveness; Tropical fruits; Amazon; Agribusiness.
Ano: 2004
URL: http://purl.umn.edu/56772

MUDANÇAS CLIMÁTICAS E O PROTOCOLO DE QUIOTO: IMPLICAÇÕES PARA INSERÇÃO DA REGIÃO AMAZÔNICA NO MERCADO DE CARBONO
Provedor de dados: 31
Autores: Cavalcanti,   Francisco Carlos Da Silveira; Mastrangelo,   Joao Paulo Santos; Silva,   Zenobio Perelli Gouveia E.
O presente trabalho teve por objetivo analisar o desempenho financeiro de um projeto de reflorestamento sustentável de Teca (Tectona grandis L.f.) na região amazônica, especificamente no Estado do Acre, visando à comercialização de créditos de carbono no âmbito do Protocolo de Quioto por meio do Mecanismo de Desenvolvimento Limpo (MDL). Para o caso específico da região amazônica, foi uma oportunidade para avaliar estratégias de políticas ambientais baseadas em instrumentos econômicos, e suas possíveis repercussões na região. Em relação à análise da viabilidade econômica do projeto como candidato a participação no mercado de carbono, obteve-se primeiramente um rendimento aproximado de 160 Reduções Certificadas de Emissões (RCEs) de carbono equivalente (CO2...
Tipo: Conference Paper or Presentation
Palavras-chave: Desenvolvimento Sustentável; Amazônia; Economia Florestal; Ustainable Development; Amazon; Forest Economy; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/114022

DEFORESTATION AND AGROFORESTRY ADOPTION IN TROPICAL FORESTS: CAN WE GENERALIZE? SOME RESULTS FROM CAMPECHE, MEXICO AND RONDONIA, BRAZIL
Provedor de dados: 31
Autores: Casey,   James F.; Caviglia-Harris,   Jill L.
The adoption of sustainable agriculture and other sustainable forestry  methods that can help to reduce tropical deforestation have received a great deal of attention in  the literature (Adesina and Zinnah 1993, Akinola and Young 1985, Feder and Slade 1984, Holden 1993, Kebede et al. 1990). Although results from different studies can be compared in an absolute sense, there are very few individual studies that compare results and determine, through empirical analysis, whether policy can be universally applied. This paper uses farm-level data to determine whether some universal conclusions can be drawn about the adoption of agroforestry by peasant farmers in developing countries by comparing the land use choices of farmers in Rondônia, Brazil and Campeche,...
Tipo: Conference Paper or Presentation
Palavras-chave: Brazil; Mexico; Agroforestry; Tropical Deforestation; Sustainable Agriculture; Adoption; Amazon; Campeche; Rondonia; Resource /Energy Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/36466

O CONSUMO DE PRODUTOS AGROECOLÓGICOS NO ACRE
Provedor de dados: 31
Autores: Siviero,   Amauri; Abreu,   Lucimar Santiago; Mendes,   Roberval; Gomes,   Francisco Carlos Rocha.
O crescimento na produção de alimentos agroecológicos no Brasil e no mundo tem sido provocado por fatores chaves como, demanda dos consumidores urbanos e a crescente consciência da sociedade sobre os problemas ambientais decorrentes do uso inadequado dos recursos naturais, e em especial pelas preocupações dos indivíduos com a saúde. A tendência atual para o produto agroecológico em termos de mercado é de ampliar as vendas e a distribuição deixando de atender somente o mercado de nicho direcionando a produção para diversos mercados. Atualmente os produtos agroecológicos podem ser encontrados tanto em lojas secundárias, feiras livres, supermercados como até podem ser recebidos em cestas a domicilio, ou seja, as vendas podem atingir o mercado de massa. O...
Tipo: Conference Paper or Presentation
Palavras-chave: Agroecologia; Consumidores; Venda direta; Amazônia; Agriculture organic; Sustainable consumption; Selling direct; Amazon; Farm Management.
Ano: 2008
URL: http://purl.umn.edu/109586

DETERMINANTES DA ADOÇÃO DE SISTEMAS DE USO DA TERRA EM PÓLOS DE PRODUÇÃO AGROPECUÁRIA NO ESTADO DO ACRE, AMAZÔNIA BRASILEIRA
Provedor de dados: 31
Autores: Santos,   Jair Carvalho Dos; Braga,   Marcelo Jose; Homma,   Alfredo Kingo Oyama.
A expansão da agricultura e da pecuária tem sido considerada como a principal causa do desmatamento que se processa na Amazônia. A decisão de escolha do sistema de uso da terra é um elemento determinante dos níveis de desmatamento e fatores relacionados às características da família e Ao ambiente socioeconômico antecedem as decisões de adoção desses sistemas. O objetivo desse estudo foi identificar os condicionantes da adoção dos diferentes sistemas de uso da terra nos principais pólos de produção agropecuária familiar no estado do Acre. Utilizou-se o modelo econométrico SUR nessa avaliação. Os resultados mostram que direito de propriedade, contratação de mão-de-obra e origem do produtor na região norte do Brasil favorecem a adoção dos sistemas agrícolas...
Tipo: Conference Paper or Presentation
Palavras-chave: Sistema de produção; Agricultura familiar; SUR; Crédito agrícola; Desmatamento; Farm system; Household agriculture; Amazon; SUR; Land tenure; Deforestation; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/112689

ANÁLISE SÓCIOECONÔMICA DOS AGROSILVICULTORES DO PROJETO DE REFLORESTAMENTO ECONÔMICO CONSORCIADO E ADENSADO (RECA), EM NOVA CALIFÓRNIA, RONDÔNIA
Provedor de dados: 31
Autores: Franke,   Idesio Luis; Alves,   Isabel Teresa Gama; Sa,   Claudenor Pinho De; Santos,   Jair Carvalho Dos; Valentim,   Judson Ferreira.
O assentamento agrícola de centenas de milhares de famílias na Amazônia gerou problemas ambientais e socioeconômicos significativos na região. Em 1984 foi implantado pelo Instituto nacional de Colonização e Reforma Agrária (INCRA) o Projeto de Assentamento Agrícola do Alto Madeira, em Vila Nova Califórnia-RO, divisa com o Estado do Acre. A partir de 1988, algumas lideranças rurais e produtores do assentamento resolvem priorizar o uso alternativo da terra com Sistemas Agroflorestais – SAFs, tendo como base o consórcio de culturas perenes regionais (cupuaçu, pupunha, castanha-do-brasil) e café, e formaram a Associação de Pequenos Agrosilvicultores do Projeto de Reflorestamento Econômico Consorciado e Adensado, que passou a ser conhecida como Projeto RECA....
Tipo: Conference Paper or Presentation
Palavras-chave: Sistemas Agroflorestais; Amazônia; Socioeconomia; RECA; Agroforestry Systems; Amazon; Socioeconomy; RECA; Farm Management.
Ano: 2008
URL: http://purl.umn.edu/109629

A SUSTENTABILIDADE DAS RESERVAS EXTRATIVISTAS PELA PERSPECTIVA DA ECONOMIA ECOLÓGICA
Provedor de dados: 31
Autores: Cavalcanti,   Francisco Carlos Da Silveira; Maciel,   Raimundo Claudio Gomes; Mangabeira,   Joao Alfredo De Carvalho; Reydon,   Bastiaan Philip.
As Reservas Extrativistas (RESEX) são áreas de domínio público, com uso concedido às populações extrativistas tradicionais, cuja subsistência baseia-se no extrativismo e na agricultura de subsistência e na criação de animais de pequeno porte, e têm como objetivos básicos proteger os meios de vida e a cultura dessas populações, e assegurar o uso sustentável dos recursos naturais da unidade. Porém, o aumento da área para agropecuária dentro das reservas vem aumentando e, assim, o desmatamento. O presente estudo tem como objetivo promover uma reflexão sobre a regulamentação ambiental e suas conseqüências, bem como sobre a organização popular como instrumento capaz de deter o desmatamento na Amazônia. Neste sentido, as RESEX, resultado da luta política e...
Tipo: Conference Paper or Presentation
Palavras-chave: Sustentabilidade; Reservas Extrativistas; Economia Ecológica; Amazônia; Regulamentação ambiental; Sustainability; Extractivist Reserves; Ecological Economics; Amazon; Environmental regulation; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/113395

AMAZÔNIA: RECUPERAR ÁREAS DEGRADADAS, PASSAR DO DISCURSO PARA A PRÁTICA
Provedor de dados: 31
Autores: Homma,   Alfredo Kingo Oyama.
A solução dos problemas na Amazônia não são independentes, mas conectada com outras partes do País e do mundo. A redução dos desmatamentos e queimadas na Amazônia depende do desenvolvimento de atividades agrícolas adequadas nas áreas já desmatadas e que tenham mercado, em vez do uso “sustentável” da floresta e de direitos difusos. Nesse sentido, uma política agrícola teria efeitos mais positivos do que uma política ambiental, que não pode ser efetuada de maneira isolada das demais regiões do País, sob risco de transferir contingentes populacionais de outras localidades. Há necessidade de elevar a produtividade das atividades agrícolas na Amazônia, reduzirem a pressão sobre os recursos naturais com risco de esgotamento, incentivar plantios racionais de...
Tipo: Conference Paper or Presentation
Palavras-chave: Amazônia; Subdesenvolvimento sustentado; Desglobalização; Desmistificação; Amazon; Sustainable underdevelopment; Desglobalization; Demystification; Agricultural and Food Policy; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108933

ESTIMATIVA DA CURVA DE KUZNETS AMBIENTAL PARA A AMAZÔNIA LEGAL.
Provedor de dados: 31
Autores: Santos,   Ricardo Bruno Nascimento dos; Diniz,   Marcelo Bentes; Diniz,   Marcia Juca Teixeira; Rivero,   Sergio Luiz De Medeiros; Oliveira Junior,   Jose Nilo de.
O presente trabalho investigou a hipótese da Curva Ambiental de Kuznets – CAK, diante da controvérsia que existe na atual literatura entre o crescimento econômico e impactos ambientais. A principal contribuição do artigo é apresentar um estudo de caso voltado para uma das regiões mais importantes no debate ambiental que é a Amazônia Legal. A questão em si, que não está determinada teoricamente, e apresenta diversos resultados empíricos contraditórios, incorpora a idéia de verificar se o crescimento econômico gera algum tipo de proteção automática ao meio ambiente, e até ao desenvolvimento sustentável. Com isso, o presente trabalho procura contribuir para esse debate, trazendo evidências empíricas inéditas a âmbito regional. Utilizando como variável...
Tipo: Conference Paper or Presentation
Palavras-chave: Meio Ambiente; Hipótese de Kuznets; Amazônia; Crescimento Econômico; Environment; Kuznets Hypothesis; Amazon; Economic Growth; Environmental Economics and Policy; International Development.
Ano: 2008
URL: http://purl.umn.edu/113968

PROAMBIENTE: UMA POLÍTICA DE PAGAMENTO DE SERVIÇOS AMBIENTAIS NO BRASIL
Provedor de dados: 31
Autores: Oliveira,   Luiz Rodrigues De; Altafin,   Iara Guimaraes.
Este artigo tem como objetivo discutir os resultados preliminares do Programa de Desenvolvimento Sustentável da Produção Familiar Rural da Amazônia – PROAMBIENTE. Para tanto, reúne inicialmente os principais elementos que permeiam as disputas em torno da definição de um conceito de serviços ambientais e, na seqüência, ressalta as potencialidades da agricultura familiar na preservação de recursos naturais, com destaque para o papel das populações tradicionais na conservação da floresta e na prestação de serviços que contribuam para a melhoria das condições ambientais. A análise do PROAMBIENTE revelou, de um lado, avanços em termos de participação da sociedade civil e, de outro, dificuldades de diálogo entre diferentes setores da estrutura governamental,...
Tipo: Conference Paper or Presentation
Palavras-chave: Proambiente; Amazônia; Serviços Ambientais; Proambiente; Amazon; Ambiental  Services; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108077

Mudancas em Infra-estrutura, Agencia Humana e Resiliencia em Sistemas Socio-ecologicos: Arcabouço Teórico e Abordagem Metodologica
Provedor de dados: 31
Autores: Perz,   Stephen G.; Valho,   Lucas Araujo Car; Passos,   Veronica; Rocha,   Karla; Silveira,   Marcos.
Propomos aumentar o conhecimento sobre os impactos da construção e melhoramento em obras de infra-estrutura, nesse caso em particular das estradas, e nas relações entre as pessoas e a floresta. Este tema multifacetado será abordado por um complexo sistema de interações, com ênfase na dinâmica das redes ecológicas, sócio-econômicas e institucionais. Integraremos estes dados de pontos multi-temporais e espacialmente explícitos no sentido de compilar um banco de dados que promova um melhor entendimento da complexa dinâmica das mudanças trazidas por melhoria na infra-estrutura viária. Esta base de dados integrada permitirá modelagem espaço-temporal para comprovar várias expectativas sobre sistemas complexos, como por exemplo, impactos decorrentes de nova...
Tipo: Presentation
Palavras-chave: Infra-estrutura; Resiliencia; Conectividade; Brasil; Amazonia; Infrastructure; Resilience; Connectivity; Brazil; Amazon; Community/Rural/Urban Development.
Ano: 2008
URL: http://purl.umn.edu/119004

Biologia floral de Unonopsis guatterioides (A. D.C.) R.E. Fr., uma Annonaceae polinizada por Euglossini
Provedor de dados: 88
Autores: CARVALHO,RAQUEL; WEBBER,ANTONIO C.
A biologia floral e a polinização por abelhas Euglossini de uma Annonaceae é descrita pela primeira vez e as adaptações a esse modo de polinização são comparadas às de outras espécies da família, que é predominantemente polinizada por coleópteros. A espécie Unonopsis guatterioides foi estudada em dois fragmentos de mata de terra firme no município de Manaus (AM). As flores são protogínicas e permanecem abertas expondo os estigmas e estames durante a antese que ocorre entre dois dias. São visitadas por machos de Eulaema bombiformis (Euglossini) que coletam o odor o qual se assemelha ao de "capim cidreira" (Andropogum nardus L.). Visitas de abelhas Meliponidae e coleópteros Chrysomelidae também foram registradas. Unonopsis guatterioides apresenta dicogamia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annonaceae; Floral biology; Pollination; Euglossini; Amazon.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400008

Lecythidaceae Poit. in the Tupé Sustainable Development Reserve, Manaus, Brazil
Provedor de dados: 88
Autores: Matta,Luisa Brasil Viana; Scudeller,Veridiana Vizoni.
Lecythidaceae is the family of the Brazil nut, and comprises about 300 species belonging to 17 genera with pantropical distributions. One hundred and twenty-two species belonging to nine genera are distributed throughout Brazil, demonstrating its greatest diversity in the Amazon rainforest where Lecythidaceae is also one of the most abundant families. It is usually difficult to collect fertile material from these trees because of their canopy heights, and species determinations using sterile material can be complex because of their morphological similarities. There have been relatively few studies of this family even though it is one of the most important groups in the Amazon region, and a detailed taxonomic treatment of the species of Lecythidaceae in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; External morphology; Lecythidoideae; Reserva do Tupé; Taxonomy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000200008

Phenology, litterfall, growth, and root biomass in a tidal floodplain forest in the Amazon estuary
Provedor de dados: 88
Autores: Cattanio,José H.; Anderson,Anthony B.; Rombold,John S.; Nepstad,Daniel C.
The dynamics of forests subject to inundation appears to be strongly influenced by the frequency and intensity of natural disturbances such as flooding. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we tested this prediction by measuring seasonal patterns of phenology and litterfall in relation to two key variables: rainfall and tide levels. In addition, we estimated the root biomass and the annual growth of the forest community by measuring stem increments over time. Our results showed high correlations between phenological events (flowering and fruiting) and rainfall and tide levels, while correlations between litterfall and these variations were generally weaker. Contrary to our prediction, root biomass to 1 m...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Floodplain forest; Litterfall; Phenology; Productivity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000400010

The genus Habenaria (Orchidaceae) in the Brazilian Amazon
Provedor de dados: 88
Autores: Batista,João A. N.; Silva,João Batista F. da; Bianchetti,Luciano de Bem.
A survey of Habenaria in the Amazon region in northern Brazil was undertaken. Forty species are recognized for the region. The majority of the species occur in savannah vegetation and the vegetation types with the highest number of species are the inland savannahs on terra firme (19 spp.), the savannahs of Roraima (16 spp.) and the coastal savannahs of Pará and Amapá (15 spp.). Only four species grow in forest and three in the Amazonian caatinga. Nine of these species are restricted in Brazil to the Amazon region, four species from forest formations and three from highlands at the border with Venezuela. Only one species, H. sylvicultrix Lindl. ex Kraenzl., is possibly endemic to northern Brazil. When compared to other regions, the greatest similarity is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Brazil; Habenaria; Orchidaceae.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000100011

Potential acidity estimated by SMP pH in soils of the state of Pará
Provedor de dados: 90
Autores: Gama,Marcos André Piedade; Matos,Gilson Sergio Bastos de; Silva,George Rodrigues da; Brasil,Edilson Carvalho; Nunes,Otiniel Ferreira.
The use of SMP pH to estimate the potential acidity (H + Al) is more practical than the method of 0.5 mol L-1 calcium acetate for routine laboratory analyses. The objective was to fit an equation to estimate the H + Al from SMP pH values of soils of the State of Pará. From various regions of the state, 177 soil samples were collected, in which the SMP pH was determined in 0.01 mol L-1 CaCl2 solution and H + Al in 0.5 mol L-1 calcium acetate and the results were related by regression analysis. The equation H + Al = 77.77 + 20.61 SMP pH - 1.435 SMP pH² (R² = 0.90) expressed the H + Al values (in cmol c dm-3) best. When the SMP pH values were used in equations referring to other regions or states in Brazil, the H +Al values were over- or underestimated. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: H + Al; Soil analysis; Amazon; Soil fertility.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100020

Sampling and TDR probe insertion in the determination of the volumetric soil water content
Provedor de dados: 90
Autores: Teixeira,W. G.; Schroth,G.; Marques,J. D.; Huwe,Bernd.
Volumetric soil water content (theta) can be evaluated in the field by direct or indirect methods. Among the direct, the gravimetric method is regarded as highly reliable and thus often preferred. Its main disadvantages are that sampling and laboratory procedures are labor intensive, and that the method is destructive, which makes resampling of a same point impossible. Recently, the time domain reflectometry (TDR) technique has become a widely used indirect, non-destructive method to evaluate theta. In this study, evaluations of the apparent dielectric number of soils (epsilon) and samplings for the gravimetrical determination of the volumetric soil water content (thetaGrav) were carried out at four sites of a Xanthic Ferralsol in Manaus - Brazil. With the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Oxisols; Time domain reflectometry; Dieletric properties.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832003000400001

First record of Anastrepha parishi Stone (Diptera, Tephritidae) and its host in Brazil
Provedor de dados: 92
Autores: Jesus,Cristiane Ramos de; Oliveira,Manoela Nobre de; Souza Filho,Miguel Francisco de; Silva,Ricardo Adaime da; Zucchi,Roberto Antonio.
Anastrepha parishi Stone, 1942 was reared in fruits of Oenocarpus bacaba Martius, 1823 (Arecaceae) collected in Pracuúba, State of Amapá. This is the first record of an Anastrepha species in a native species of Arecaceae.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Arecaceae; Diversity; Fruit fly; Oenocarpus bacaba.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000100023

Mosquitoes (Diptera, Culicidae) inhabiting foliar tanks of Guzmania brasiliensis Ule (Bromeliaceae) in central Amazonia, Brazil
Provedor de dados: 92
Autores: Torreias,Sharlene Roberta da Silva; Ferreira-Keppler,Ruth Leila; Godoy,Bruno Spacek; Hamada,Neusa.
Mosquitoes in the family Culicidae develop their immature forms in different environments depending on various circumstances. This study represents the first contribution to the ecological knowledge of culicids living in the bromeliad G. brasiliensis. The objectives of the study were to compare the Culicidae fauna of bromeliads in two seasonal periods, analyzing their abundance, richness and the influence of pH, conductivity and water volume, on the populations. Sampling was done at Reserva Adolpho Ducke, Manaus, Amazonas, Brazil between 2003 and 2005. Six samplings were done in the rainy season and six in the dry season. On each sampling day, six terrestrial and six epiphytic bromeliads, totaling 144 sampling units, were retrieved. A total of 444 immature...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Aquatic insects; Culex (Microculex); Phytotelmata; Wyeomyia.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000400013

Impact of a gall midge Parkiamyia paraensis (Diptera, Cecidomyiidae) on the Amazonian plant Parkia pendula (Fabaceae)
Provedor de dados: 92
Autores: Fernandes,G. Wilson; Santos,Jean Carlos; Castro,Fabiana Marize C.; Castilho,Alexandre.
We observed the occurrence of large numbers of galls induced by Parkiamyia paraensis (Diptera, Cecidomyiidae) on the leaflets of Parkia pendula (Fabaceae) in northern Para, Brazil. We addressed two questions in this study: i) what is the proportion of attacked plants in the field, and nursery conditions?; and ii) what is the impact of galls on the host plant? An average of 86% of the plants were galled in the field. Galled P. pendula were distinct from healthy individuals due to their prostrated architecture and death of terminal shoots. Approximately 50% of the total available leaves and 35% leaflets were attacked by P. paraensis on saplings under nursery conditions. Each one-year old plant supported an average of 1,300 galls, and an average of 60g...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Herbivore impact; Insect galls; Porto Trombetas.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262007000400011

The fauna of phlebotomines (Diptera, Psychodidae) in different phytogeographic regions of the state of Maranhão, Brazil
Provedor de dados: 92
Autores: Rebêlo,José Manuel Macário; Rocha,Roseno Viana da; Moraes,Jorge Luiz Pinto; Silva,Cláudio Roberto Marques da; Leonardo,Francisco Santos; Alves,Gildário Amorim.
Phlebotomine specimens were captured in domiciliary and forest environments in 47 municipalities between 1982 and 2005 with the aid of CDC light traps. A total of 91 species were found, of which four belonged to genus Brumptomyia and 87 to genus Lutzomyia, distributed among the following subgenera: Evandromyia (6), Lutzomyia (5), Micropygomyia (2), Nyssomyia (9), Pintomyia (2), Pressatia (3), Psathyromyia (6), Psychodopygus (14), Sciopemyia (4), Trichophoromyia (2), Viannamyia (2); species groups: Aragaoi (2), Baityi (1), Dreisbachi (1), Migonei (12), Oswaldoi (8), Pilosa (1), Saulensis (2), Verrucarum (4) and ungrouped (1). Species diversity was greatest in areas where there was dense evergreen seasonal forest (52 species), ombrophilous forest (31) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Babassu palm forests; Cerrado; Phlebotominae.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000300022

A 15-year post evaluation of the fire effects on ant community in an area of Amazonian forest
Provedor de dados: 92
Autores: Santos,Jean C.; Delabie,Jacques H. C.; Fernandes,G. Wilson.
Fire represents an important disturbance to ant communities in areas of fire regime. Otherwise, little is known about the effects of fire on ant communities in areas of non-fire regimes, such as in the Amazonian region. We evaluated the long-term effect of fire on ant species richness in a rain forest (Bacaba Plateau) burned 15-years ago and compare our data with the data of primary unburned forest. A total of 85 ant species distributed in 21 genera and 14 tribes were collected; among them, 72 and 44 species were found on the litter and vegetation, respectively. The fire damaged forest studied supports an intermediate richness of ants when compared to a primary unburned rain forest in the same region. A comparative analysis of ant species richness showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Brazil; Community structure; Rain forest; Species richness.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000100015

Activities of tabanids (Diptera, Tabanidae) attacking domestic duck-Cairina moschata (Linnaeus) (Aves, Anatidae), introduced in a forest area in the Central Amazon, Manaus, Brazil
Provedor de dados: 92
Autores: Ferreira,Ruth L. M.; Rafael,José A.
Presented here are the feeding habits, attack behavior, daily and annual activity of adult of Phorcotabanus cinereus (Wiedeman, 1821), Chrysops laetus (Fabricius, 1805) and Phaeotabanus cajennensis (Fabricius, 1787), while biting a domestic duck, Cairina moschata (Linnaeus, 1758). The last two species were recorded for the first time attacking birds. This study comprehended monthly observations of two consecutive days from April/97 to March/98 between 5:30 a.m. and 6:30 p.m. at the Army Instructional Base ((BI-2/CIGS) near Manaus. Annual occurrence of P. cinereus was from July to September, with a daily occurrence between 9:00 a.m. and 5:00 p.m. and highest activity at 12:00 a.m. and 2:00 p.m. C. laetus ocurred from June to October; with a daily occurrence...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Domestic duck; Horseflies; Tabanidae.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000200018

The previously unknown pupa and adult male of Neobezzia fittkaui Wirth &amp;amp; Ratanaworabhan (Diptera, Ceratopogonidae)
Provedor de dados: 92
Autores: Ronderos,María M.; Borkent,Art; Marino,Pablo I.; Spinelli,Gustavo R.; Ferreira-Keppler,Ruth L.
The previously unknown pupa and adult male of Neobezzia fittkaui Wirth &amp;amp; Ratanaworabhan (Diptera, Ceratopogonidae). The pupa of Neobezzia fittkaui Wirth &amp;amp; Ratanaworabhan, 1972, collected from a mat of floating fern (Salvinia auriculata Aubl., Salviniaceae) in Ilha da Marchantaria near Manaus, Brazil and the reared adult male are described, photographed and illustrated for the first time. This is the first detailed pupal description for the genus Neobezzia Wirth &amp;amp; Ratanaworabhan.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Immatures; Male adult; Neobezzia fittkaui.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000400002

A synopsis of the Hydrometra (Hemiptera, Heteroptera, Hydrometridae) from the Amazon River floodplain, Brazil, with redescription of Hydrometra argentina Berg
Provedor de dados: 92
Autores: Moreira,Felipe Ferraz Figueiredo; Ribeiro,José Ricardo Inacio; Nessimian,Jorge Luiz.
Hydrometra argentina Berg, 1879, H. caraiba Guérin-Méneville, 1857 and H. guianana Hungerford &amp;amp; Evans, 1934 are newly recorded in the Amazon River floodplain, Brazil. A redescription of H. argentina is also given, as the original description is incomplete. A key to the three known species occurring in this region is provided. Hydrometra argentina can be distinguished from H. caraiba and H. guianana by the body length smaller than 12.50 mm, anteoculus/postoculus ratio between 1.80 and 2.00, clypeus narrow and conical, metacetabulum with no circular pits, and projections on male abdominal sternite VI in the shape of simple spines. The other species can be distinguished mainly by the anteoculus/postoculus ratio and position of projections on male...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Aquatic insects; Gerromorpha; Neotropics; Taxonomy.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000100017

Sand flies (Diptera, Psychodidae, Phlebotominae) from Central Amazonia and four new records for the Amazonas state, Brazil
Provedor de dados: 92
Autores: Alves,Veracilda R.; Freitas,Rui A. de; Santos,Francisco L.; Oliveira,Arley F. J. de; Barrett,Toby V.; Shimabukuro,Paloma H. F.
Sand flies from Central Amazonia and four new records for the Amazonas state, Brazil. A survey was conducted in May and June 2008 to study the fauna of insects in Central Amazonia, Brazil. As part of the survey, we report here that sixty species of phlebotomine were identified, totaling 13,712 specimens from 13 genera. The collection sites were located at the border between the states of Pará and Amazonas, comprising three municipalities from the Amazonas state (Borba, Maués, and Nhamundá). Malaise, CDC and Shannon traps were used to collect the insects. Most of the sand flies were collected by CDC traps (89.5%), while Malaise and Shannon traps collected 7% and 3.5%, respectively. The most abundant genera, representing 97.1% of the total sand flies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Inventory medical entomology phlebotomine sand flies.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000200009

POST-ACIDIFICATION AND EVALUATION OF ANTHOCYANINS STABILITY AND ANTIOXIDAN ACTIVITY IN AÇAI FERMENTED MILK AND YOGURTS (Euterpe oleracea Mart.)
Provedor de dados: 94
Autores: 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

Development of a shelling method to recover whole kernels of the Cutia nut (Couepia edulis)
Provedor de dados: 94
Autores: Pessoa,José Dalton Cruz; Leeuwen,Johannes Van.
The kernel of the cutia nut (castanha-de-cutia, Couepia edulis (Prance) Prance) of the western Amazon, which is consumed by the local population, has traditionally been extracted from the nut with a machete, a dangerous procedure that only produces kernels cut in half. A shelling off machine prototype, which produces whole kernels without serious risks to its operator, is described and tested. The machine makes a circular cut in the central part of the fruit shell, perpendicular to its main axis. Three ways of conditioning the fruits before cutting were compared: (1) control; (2) oven drying immediately prior to cutting; (3) oven drying, followed by a 24-hour interval before cutting. The time needed to extract and separate the kernel from the endocarp and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Instrumentation; Nut; Kernel; Shelling; Extraction method; Amazon.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452006000200018

AÇAÍ PULP DEMAND IN THE RETAIL MARKET OF BELÉM, STATE OF PARÁ
Provedor de dados: 94
Autores: SANTANA,ANTÔNIO CORDEIRO DE; SANTANA,ÁDINA LIMA DE; SANTANA,ÁDAMO LIMA DE.
ABSTRACT  The aim of this work was to estimate the parameters associated to the demand for açaí pulp in the retail market of Belém. Multiple regression analysis was applied to identify the key variables that impact on product consumption and to estimate the price and income elasticities and cross demand. The econometric estimation method applied was the least squares to correct heteroscedastic variance problems. Results have shown that the demand for açaí pulp is price and income inelastic. Fish and cassava flour were confirmed as complementary products of strong influence on the decisions of consumers. Product quality, with regard to its association to Chagas disease, also revealed a strong influence on product choice for household consumption. Finally,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Açaí market; Demand elasticities; Food safety; Amazon.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000100501

MORPHOANATOMY OF Garcinia madruno (KUNTH) HAMMEL (CLUSIACEAE) UNDER WATERLOGGED CONDITIONS
Provedor de dados: 94
Autores: ABREU,NATÁLIA DO COUTO; BARBOSA,SUZANA MARQUES; GURGEL,ELY SIMONE CAJUEIRO; CARVALHO,WENDELL VILHENA DE.
ABSTRACT Garcinia madruno (Kunth) Hammel is a neotropical tree that naturally occurs in terra firme forests and is important as a source of income and medicine for Amazonian populations. This study describes and compares the morphoanatomical responses of plants under conditions of stress and normoxia. Young plants of Garcinia madruno were subjected to two water regimes: daily controlled irrigation and waterlogged for 84 days. Hypertrophic lenticels, adventitious roots and anatomical characteristics of the roots and leaves were evaluated on days 0, 21, 42, 63 and 84. There were no changes in leaf structure, but cracks and hypertrophic lenticels appeared on the stems, there was an increase in blackness of the roots and the plants formed adventitious roots to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bacurizinho; Stress; Fruit; Histochemistry.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500201

Richness, breeding environments and calling activity of the anurofauna of the lower moa river forest, state of Acre, Brazil
Provedor de dados: 103
Autores: Miranda,Daniele B.; Albuquerque,Saymon de; Turci,Luiz Carlos B.; Bernarde,Paulo S.
In state of Acre, most anuran research has been carried out in areas of terra firme, whereas alluvial forests remain relatively unexplored. We document the richness, breeding environments and calling season of the anurans of the Lower Moa River in the Alto Juruá (state of Acre), a region considered to harbor high biodiversity. Sampling was conducted in two main areas with different forest typologies (Terra firme forest and Alluvial forest), totaling 256 ha. The diversity of anurans was analyzed using the Shannon-Wiener index, evenness and Berger - Parker dominance. The anurans were sampled from October 2008 to September 2009, using the following sampling methods: sampling at breeding sites, pitfall traps, time constrained visual search during the day...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Amphibia; Biodiversity; Terra firme forest; Alluvial forest.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000200093

Review of Paraphotina (Mantodea: Photinaidae)
Provedor de dados: 103
Autores: Agudelo,Antonio A.; Rafael,José A.
ABSTRACT The number of studies on Neotropical mantises has been growing in recent years, and the systematics of Mantodea is now a dynamic field with noteworthy contributions. Several taxonomic revisions have been published recently. The taxonomy of Paraphotina Giglio-Tos, 1915 is reviewed as part of current studies on systematics of Neotropical Mantodea. Currently, Paraphotina contains four species from South America: P. caatingaensis (Menezes &amp; Bravo, 2013) comb. nov., P. insolita (Rehn, 1941), P. occidentalis Lombardo, 1998 and P. reticulata (Saussure, 1871). Paraphotina venezuelana Beier, 1963 is a new junior synonym of P. insolita . Keys for the Paraphotina species are proposed. The distribution of Paraphotina species is apparently correlates with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Neotropics; Praying mantises; Taxonomy.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000603004

A new species of Kingsleya (Crustacea: Decapoda: Pseudothelphusidae) from the Xingu River and range extension for Kingsleya junki, freshwater crabs from the southern Amazon basin
Provedor de dados: 103
Autores: Pedraza,Manuel; Martinelli-Filho,José Eduardo; Magalhães,Célio.
Kingsleya castrensis sp. nov., a pseudothelphusid crab is described and illustrated from the Xingu River, state of Pará, southern Amazon region, Brazil. The new species is characterized by the male first gonopod bearing a large, well-developed apical plate, with a broadly rounded, thick distal lobe. New records of Kingsleya junki Magalhães, 2003 extend the distribution of this species eastward to the Tocantins River basin, in the state of Pará, Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Brachyura; Kingsleyini; Neotropical region; Taxonomy.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000100041

Snake assemblages of Marajó Island, Pará state, Brazil
Provedor de dados: 103
Autores: Rodrigues,Gerson Moreira; Maschio,Gleomar Fabiano; Prudente,Ana Lúcia da Costa.
ABSTRACT We describe the diversity, natural history and structure of snake assemblages from Marajó Island, state of Pará, Brazil, after analyzing 439 specimens deposited in herpetological collections. We tested the hypothesis that snake assemblages from forest and open areas of Marajó Island are distinct with regard to their structure, composition and functional groups. To compare the snake composition of the forest and open areas of Marajó with other comparable assemblages in Brazil, Principal Coordinate Analysis and Clustering tests were performed. A total of 61 species of snakes was recorded for Marajó, with ten species cited for the first time for the study area (Atractus natans Hoogmoed &amp; Prudente, 2003, A. schach (Boie, 1827), Dendrophidion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Assemblage; Functional groups; Herpetofauna.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000100700

Masteria manauara sp. nov., the first masteriine species from Brazil (Araneae: Dipluridae: Masteriinae)
Provedor de dados: 103
Autores: Bertani,Rogério; Cruz,Wanessa Ribeiro; Oliveira,Maria Ermelinda do Espírito Santo.
A new species of Masteria L. Koch, 1873 from Manaus, Brazil, Masteria manauara sp. nov., is herein described. The specimens were collected by hand or using litter bags in the leaf litter around Attalea attaleoides (Barb. Rodr.) palm trees. The new species resembles Masteria colombiensis Raven, 1981 by lacking paraembolic apophysis on male copulatory organs and having spiniform apophysis on the ventral metatarsus I. It differs in the tibial spur, made of two subdistal, spiniform and converging spurs. Females are unique in having two spermathecae with slender helicoidal stalks. Males and females have only six eyes, and are tiny, even when compared with other Masteria species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Attalea attaleoides; Leaf litter; Mygalomorphae; Taxonomy.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000400010

Description of ten additional ossicles in the foregut of the freshwater crabs Sylviocarcinus pictus and Valdivia serrata (Decapoda: Trichodactylidae)
Provedor de dados: 103
Autores: Lima-Gomes,Renata C.; Lima,Jô de Farias; Magalhães,Célio.
ABSTRACT The morphology of stomach ossicles of decapod crustaceans provides valuable information on their phylogeny and biology. We herein described ten new ossicles in the foreguts of two trichodactylid crabs, Sylviocarcinus pictus (H. Milne-Edwards, 1853) and Valdivia serrata White, 1847, in addition to previously described 38 ossicles, which are also recognized and listed. Five specimens each of S. pictus and V. serrata were selected for morphological analysis of gastric ossicles. The stomachs were obtained after removing the carapace, and they were fixed in 10% formalin for 24 hours. After this procedure, the stomachs were immersed in a solution of 10% Potassium Hydroxide (KOH) and heated to 100 °C during 60 minutes for tissue maceration. At this...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Anatomy; Foregut; Morphology; Neotropical; Stomach; Valdiviini.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100312

Dactylogyrids (Platyhelminthes: Monogenoidea) from the gills of Hassar gabiru and Hassar orestis (Siluriformes: Doradidae) from the Xingu Basin, Brazil
Provedor de dados: 103
Autores: Soares,Geusivam Barbosa; Santos Neto,João Flor dos; Domingues,Marcus Vinicius.
ABSTRACT Four species of Cosmetocleithrum (three new) and one new species of Vancleaveus are described or reported parasitizing the gills of doradid catfishes (Siluriformes) from Xingu River and related tributaries: Cosmetocleithrum phryctophallus sp. nov. and Cosmetocleithrum bifurcum Mendoza-Franco, Mendoza-Palmero &amp; Scholz, 2016 from Hassar orestis; Cosmetocleithrum leandroi sp. nov. from Hassar gabiru; Cosmetocleithrum akuanduba sp. nov. and Vancleaveus klasseni sp. nov. from Hassar orestis and H. gabiru. Cosmetocleithrum phryctophallus sp. nov. differs from its congeners by possessing a male copulatory organ (MCO) with 2 ½ counterclockwise rings, and an accessory piece with an elongate torch-shaped blade. Cosmetocleithrum leandroi sp. nov. has a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Cosmetocleithrum; Vancleaveus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100330

Metriura Drolshagen &amp;amp; Bäckstam, 2009 (Araneae: Dipluridae) is a junior synonym of Fufius Simon, 1888 (Araneae: Cyrtaucheniidae)
Provedor de dados: 103
Autores: Bertani,Rogério; Fukushima,Caroline Sayuri; Nagahama,Roberto Hiroaki.
The monotypic diplurid Metriura Drolshagen &amp;amp; Bäckstam, 2009 is placed in synonymy with Fufius (Cyrtaucheniidae) syn. nov. since Metriura lacks two of three diplurid synapomorphies (elongate posterior lateral spinnerets and the widely separated posterior median spinnerets) and shares synapomorphies with both aporoptychine cyrtaucheniids (subquadrate maxilla and a longer than wider labium) and Fufius (recurved and broad fovea, the typical incrassate tibia I of the male, with the spur having a single short branch and an apical megaspine, the basally curved metatarsus I and provided with a ventral tubercle). The type species of Metriura, M. striatipes Drolshagen &amp;amp; Bäckstam, 2009 is considered valid, and due to the synonymy of Metriura with...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Amazon; Mygalomorphae; Synonymy; Taxonomy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000500016

Quantitative evaluation of acidity tolerance of root nodule bacteria
Provedor de dados: 59
Autores: Oliveira,Luiz Antonio de; Magalhães,Hélio Paracaima de.
Quantification of acidity tolerance in the laboratory may be the first step in rhizobial strain selection for the Amazon region. The present method evaluated rhizobia in Petri dishes with YMA medium at pH 6.5 (control) and 4.5, using scores of 1.0 (sensitive, "no visible" growth) to 4.0 (tolerant, maximum growth). Growth evaluations were done at 6, 9, 12, 15 and 18 day periods. This method permits preliminary selection of root nodule bacteria from Amazonian soils with statistical precision. Among the 31 rhizobia strains initially tested, the INPA strains 048, 078, and 671 presented scores of 4.0 at both pHs after 9 days of growth. Strain analyses using a less rigorous criterion (growth scores higher than 3.0) included in this highly tolerant group the INPA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhizobia; Tolerance to pH; Amazon.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300004

How old are large Brazil-nut trees (Bertholletia excelsa) in the Amazon?
Provedor de dados: 63
Autores: Camargo,P.B. de; Salomão,R. de P.; Trumbore,S.; Martinelli,L.A.
The age of a large Brazil-nut tree (Bertholletia excelsa) is measured by radiocarbon dating, and a discussion is made about their importance in the Amazon rain-forest ecosystem.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Brazil-nut; Radiocarbon age.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000200028

Genetic diversity of American wild rice species
Provedor de dados: 63
Autores: Veasey,Elizabeth Ann; Bressan,Eduardo de Andrade; Zucchi,Maria Imaculada; Vencovsky,Roland; Cardim,Daruska Cavalcante; Silva,Rainério Meireles da.
Studies on genetic diversity and genetic structure of natural populations are important in order to define strategies for in situ and ex situ conservation actions and for plant pre-breeding programs. Aiming to assess the genetic diversity and genetic structure of three wild American Oryza species with isozyme markers, 14 populations of the diploid O. glumaepatula (AglAgl), 11 populations of the tetraploid O. grandiglumis (CCDD) and five populations of the also tetraploid O. latifolia (CCDD) were studied. They were all originated from Rio Paraguay hydrographic basin and the Amazon. Four enzymes were used and they gave 40 polymorphic bands. The most polymorphic species was O. glumaepatula, followed by O. latifolia and O. grandiglumis. A cluster analysis with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza glumaepatula; O. latifolia; O. grandiglumis; Amazon; Genetic structure.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400008

Learning soil classification with the Kayapó indians
Provedor de dados: 63
Autores: Cooper,Miguel; Teramoto,Edson Roberto; Vidal-Torrado,Pablo; Sparovek,Gerd.
The Kayapó Xicrin do Cateté (Xicrin) indigenous reserve is located within the Amazon forest in Pará (Brazil). The Xicrins have developed a soil classification system that is incorporated in their language and culture. The etymology of their classification system and its logical structure makes it similar and comparable with modern soil classification. The etymology of the Xicrin's language is based on the junction of radicals to form words for different soil names. The name of the soil is formed by the main noun radical "puka", to which adjectives referring to soil morphological attributes are added. Modern classification systems are also based on similar morphological variables, and analytical support for defining boundaries of chemical or physical soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Xicrin do Cateté; Amazon; Brazil; Indigenous knowledge.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600016

Flebotomíneos (Diptera, Psychodidae) na Amazônia: II. Listagem das espécies coletadas na bacia petrolífera no Rio Urucu, Amazonas, Brasil, utilizando diferentes armadilhas e iscas
Provedor de dados: 104
Autores: Castellón,Eloy G.; Fé,Nelson F.; Buhrnheim,Paulo F.; Fé,Flavio A.
A sandfly survey was carried out in 100 x 150 m patches of primary forest submitted to recent deforestation in order to determine its species composition 10-30 days after clearing. The following collecting methods were used: CDC traps whit black light; Malaise traps placed at 0.5, 1, 5 and 10m up from the the soil surface; Pennsylvania traps whit black light; Malaise traps, tree-base catches and human baits. A total of 2810 specimens of Lutzomyia França, 1924 and one species of Brumptomyia França &amp;amp; Parrot, 1921, were collected. In general, the predominant species were L. chagasi (Costa Lima, 1941) (25.9%), L. davisi (Root, 1934) (12.3%), L. ayrozai (Barretto &amp;amp; Coutinho, 1940) (9.32%) and L. ubiquitalis (Mangabeira, 1942), (6.93%). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psychodidae; Sandflies; Entomological list; Amazon.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200016

Natural history notes on frogs from Manaus, Amazonas
Provedor de dados: 104
Autores: Gascon,Claude.
Natural history accounts are presented for six species of anuran amphibians from the Manaus region, Amazonas. Varied information concerning advertisement call, clutch size, hatching success, and reproductive behavior for two species of dendrobatids and four species of hylids. The information was gathered over several years of field work and hopefully will serve to better understand the ecology of these species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibian fauna; Reproduction; Behavior; Amazon; Brazil.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000100003

Abundância, riqueza e diversidade de abelhas Euglossinae (Hymenoptera, Apidae) em florestas contínuas de terra firme na Amazônia Central, Brasil
Provedor de dados: 104
Autores: Oliveira,Marcio Luiz de; Campos,Lúcio Antônio de Oliveira.
The fauna of Euglossinae bees were studied in two areas of "terra firme" continuous forest in the Central Amazon. Brazil. During one year (september/1989-august/1990) the collections were done fortnightly, using traps with eight kinds of seents baits. The traps were placed in the understory and in the tree crowns. The continuous forest of "terra firme" near Manaus are among those with the highest speeies richness of Euglossinae in the Neotropics. The species richness was higher than that found in other studies carried out in Brazil also. One study area had higher species richness and abundance, while species diversity was higher in another one. The diversity was different significally between the two areas.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apidae; Euglossinae; Abundance; Amazon; Diversity.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000300009

Culicoides latreille (Diptera, Ceratopogonidae) in brazilian amazon. V: efficiency of traps and baits and vertical stratification in the forest reserve adolpho ducke
Provedor de dados: 104
Autores: Veras,Rosana S.; Castellón,Eloy G.
Monthly catches were carried out during five days/month in the Adolpho Ducke Forest Reserve (Manaus, Amazonas), from February 1990 to January 1991 in order to assess the sandfly fauna of that region, evaluate the atractivity of these insects with regard to different kinds of traps and baits and to know vertical stratification of these insects. The traps and baits used in catches were: Disney traps with baits: Didelphis sp., Gallus sp. and Mesocricetus sp.; CDC light traps at three vertical levels (1m, 5m and 10m); Suspended trap (5m) and Malaise trap (1m) and catches on bases of tree-trunks. The most efficient type was the CDC. Malaise and Suspended did not collect specimens of Culicoides Latreille, 1809. The Disney traps with baits only attracted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diptera; Caratopogonidae; Culicoides; Traps and baits; Vertical stratification; Amazon.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100012

Postura, desenvolvimento e eclosão dos ovos de Dolops carvalhoi Lemos de Castro (Crustacea, Branchiura) em laboratório, parasita de peixes da Amazônia Central
Provedor de dados: 104
Autores: Gomes,Ana Lúcia Silva; Malta,José Celso de Oliveira.
Dolops carvalhoi Lemos de Castro, 1949 was found infesting fish in a fish culture station located in highway AM-010 Manaus-ltacoatiara in the State of Amazonas. Egg laying of D. carvalhoi was studied. Hatching started after 16 days in a temperature span of 26 to 28ºC. Eggs were laid in clusters on hard substrata and covered by a gelatinous material. The number of eggs was 16 to 392 eggs by laying. In the postembryonic development the larvae were hatched from the egg as juveniles (epimorphic development), very similar to the adult shape.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Argulidae; Dolops carvalhoi; Laying; Eggs; Fish parasites; Amazon.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000600013

New records for helminths of hystricognath rodents from the middle and high Rio Negro microregion, State of Amazonas, Brazil
Provedor de dados: 104
Autores: Gonçalves,Alessandra Q.; Bóia,Márcio N.; Coura,José R.; Pinto,Roberto M.
Four nematodes and one cestode species from three Brazilian agoutis - two Dasyprocta fuliginosa Wagler, 1832 and one Dasyprocta leporina (Linnaeus, 1758) - and six pacas - Agouti paca (Linnaeus, 1766) - captured in tributaries rivers in the middle and high Rio Negro microregion, State of Amazonas, Brazil, were studied. The nematodes Physaloptera torresi (Travassos, 1920) Ortlepp, 1922, Physocephalus mediospiralis (Molin, 1859) Hall, 1916 and the cestode Raillietina (R.) trinitatae (Cameron &amp;amp; Reesal, 1951) Baer &amp;amp; Sandars, 1956 are reported from the State of Amazonas for the first time. The studied helminths (the nematodes P. torresi, P. mediospiralis, Trichuris gracilis (Rud., 1819) Hall, 1916, Helminthoxys urichi (Cameron &amp;amp; Reesal,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Cestodes; Mammals; Nematodes; Rain forest.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000300016

A new species of Graphomya Robineau-Desvoidy (Diptera, Muscidae)
Provedor de dados: 104
Autores: Couri,Márcia S.; Marques,Bianca.
Graphomya Robineau-Desvoidy is known from 12 neotropical species, only two of them with occurrence in Brazil. A new species from the Amazon is described and illustrated - G. amazonensis sp. nov. This is also the first record of the genus to the Amazon State, Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; G. amazonensis sp. nov.; Morphology; Taxonomy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000300037

Conteúdo dos criadouros larvais e comportamento de adultos de Toxorhynchites (Lynchiella) haemorrhoidalis haemorrhoidalis (Fabricius) (Diptera, Culicidae) numa floresta de terra-firme da Amazônia central
Provedor de dados: 104
Autores: Hutchings,Rosa Sá Gomes.
The natural breeding sites of Toxorhynchites (Lynchiella) haemorrhoidalis haemorihoidalis (Fabricius, 1794), in two study areas, were sampled monthly, during a period of one year, in an upland "terra-firme" forest of the Central Amazon. These natural breeding sites, consisting of water filled palm bracts on the ground, contained invertobrates and vertebrates along with palm inflorescences, leaves and twigs. The inhabitants of the non-submersed area of the bracts include Diplopoda, Acarina, Araneae, Pseudoscorpiones, Isopoda, Blattodea, Coleoptera (Carabidae, Curculionidae, Scolytidae, Staphilinidae). Collembola, Dermaptera, Diptera (Cecidomyidae, Drosophilidae, Mycetophilidae, Tipulidae), Hemiptera, Hymenoptera and Trichoptera. The submersed areas of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxorhynchites haemorrhoidalis; Breeding sites; Behavior; Amazon.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000200009

Ginandromorfo de Arsenura armida (Cramer) de Querari, São Gabriel da Cachoeira, Amazonas, Brasil (Lepidoptera, Saturniidae, Arsenurinae)
Provedor de dados: 104
Autores: Motta,Catarina da Silva.
The occurrence of a rare ginandromorph specimen of Saturniidae collected in the State of Amazonas, Brazil is reported. This is the first unique deposit of a gynandromorph in the Collection of the National Institute for Amazonian Research.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lepidoptera; Saturniidae; Gynandromorph; Querari; Amazon; Brazil.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200025

Rainfall distribution in a región of Amazon rainforest in the north of Mato Grosso
Provedor de dados: 109
Autores: Branquinho.,Rodrigo Gomes; Santos.,Djavan Pinheiro; Rocha dos Anjos.,João Carlos; Cassiano da Silva.,Gustavo; Mendes Brito.,Gustavo Henrique; Barcelo Carminatii.,Alechsandär Gahal.
Abstract Rainfall predominantly influences economic activity in northern of Mato Grosso. The scarcity of rainfall limits agricultural production, and its excess hinders the flow of production on back roads. These obstacles impose the need for greater knowledge of rainfall in distant regions of the state, such as Paranorte, in Juara-MT. This study aimed to identify the beginning and end of the rainy season, as well as the frequency and duration of dry days, besides to investigate causal relationships of rainfall with ENSO (El Niño de Oscillation Sul) phenomena. Methods based on rainfall quantity and continuity were adopted. The results showed that in Paranorte, the accumulated annual precipitation varies between 2322 and 2720 mm. The months of the year are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Mato Grosso; ENSO phenomena; Number of dry days; Temporal distribution of rainfall.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000300212

Vanamea GEN. NOV. FOR Livoneca symmetricaVAN NAME,1925, (CRUSTACEA, ISOPODA, CYMOTHOIDAE) AND A REDESCRIPTION OF THE SPECIES BASED ON SPECIMENS FROM BRAZILIAN PIRANHAS
Provedor de dados: 36
Autores: THATCHER,Vernon E.
Studies of the cymothoid isopod Livoneca symmetricaVan Name, 1925, showed that this species has characters that preclude its inclusion in LivonecaLeach, 1818, or in any other known genus. The species is redescribed on the basis of male and female specimens from the mouth cavities of Amazonian piranhas (Serrasalmus spilopleura(Kner) and S. elongatusKner) and Vanameagen. nov. is proposed for it. The new genus is defined as having: a cephalon that is not immersed in pereonite 1; mandibles that are "foot-shaped" and without incisors, pereopods that are long and unequal in size and shape; a pleon that is not immersed in the pereon; and a pleotelson that is inflated anteriorly and medially.
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=S0044-59671993000300287

First report of Myxobolus (Cnidaria: Myxozoa) spores in human feces in Brazil
Provedor de dados: 36
Autores: REIS,Lisiane Lappe dos; JESUS,Lucas Carvalho de; FERNANDES,Ormezinda Celeste Christo; BARROSO,David Eduardo.
ABSTRACT Most species of Myxobolus (Cnidaria: Myxozoa) infect freshwater and marine fish, and cause sporozoosis. Passage of myxozoan parasites into human feces has been described occasionally. We examined fecal samples from 97 dwellers of a riverine community in Amazonas State (Brazil), which revealed Myxobolus sp. in 13 (13%) samples. The discovery probably does not represent true parasitism as the myxospores - most likely ingested through the consumption of infected fish - were eliminated unchanged after passing through the gastrointestinal tract. This discovery represents the first report of this myxosporean in human fecal samples in Brazil.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Myxosporean; Human infection; Amazon; Fish consumption.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000200162

Cross-scale determinants of palm species distribution
Provedor de dados: 36
Autores: Salm,Rodolfo; Salles,Nilson Vicente de; Alonso,Wladimir J.; Schuck-Paim,Cynthia.
We investigate palm species distribution, richness and abundance along the Mokoti, a seasonally-dry river of southeastern Amazon and compare it to the patterns observed at a large scale, comprising the entire Brazilian territory. A total of 694 palms belonging to 10 species were sampled at the Mokoti River basin. Although the species showed diverse distribution patterns, we found that local palm abundance, richness and tree basal area were significantly higher from the hills to the bottomlands of the study region, revealing a positive association of these measures with moisture. The analyses at the larger spatial scale also showed a strong influence of vapor pressure (a measure of moisture content of the air, in turn modulated by temperature) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Diversity; Moisture; Palms; Tropical forests.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672007000100002

A description of mercury in fishes from the Madeira River Basin, Amazon, Brazil
Provedor de dados: 36
Autores: Bastos,Wanderley Rodrigues; Rebelo,Mauro de Freitas; Fonseca,Márlon de Freitas; Almeida,Ronaldo de; Malm,Olaf.
Over the last 20 years several projects carried on the Madeira River basin in the Amazon produced a great amount data on total Hg concentration in different fish species. In this paper we discuss temporal trends in Hg contamination and its relation to body weight in some of those fishes, showing that even within similar groups, such as carnivorous and non-migratory fish, the interspecies variability in Hg accumulation is considerable.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Mercury; Biomagnification; Madeira River; Amazon.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000300006

Ants obtained from trees of a "Jacareuba" (Calophyllum brasiliense) forest plantation in Central Amazonia by canopy fogging: first results
Provedor de dados: 36
Autores: HARADA,Ana Yoshi; ADIS,Joachim.
Canopies of the locally occurring Amazonian tree species Calophyllum brasiliense. Camb. (Guttiferae, height 10 m) were fogged after dawn on the same day at five adjacent localities in a 20-year-old plantation at the Adolpho Ducke Forest Reserve near Manaus/Brazil, using natural pyrethrum (0.5%, 1.0%, 1.5%), Baythroid (0.3%) and diesel oil, respectively. The 1152 ants collected represented 52 species, 17 genera and five subfamilies. The highest number of ant species was obtained with the synthetic pyrethrum Baythroid 0.3% and with natural pyrethrum 1.5%. About 46% of the total ant species were only collected in the first hour after fogging, and 17% only during the second hour, after trees had been heavily shaken. About 73% of the total ant specimens dropped...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ants; Canopy fogging; Pyrethrum; Forest plantation; Amazon; Neotropics.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300309

Notes on natural history and behavior of Monodelphis glirina (Didelphimorphia, Didelphidae) and sympatry with congeners
Provedor de dados: 36
Autores: BRANDÃO,Marcus Vinicius; SEBASTIÃO,Harley; KUNIY,Adriana Akemi; CAVALIERI,Soraya; GODOY,Leandro Perez.
ABSTRACT Monodelphis glirina is endemic to the Amazon and its life habits and natural history are poorly known. Data on the species were collected in northern Mato Grosso, Brazil, including observations on its behavior and simpatry with congeners. During 10 expeditions and with an effort of 3,680 buckets-day, 29 M. glirina, three M. saci and one M. emiliae individuals were captured. Adults accounted for 82.8% of M. glirina captures, with a sex ratio of three males for each female. Capture of young and lactating females was seasonal, as both were captured only in the rainy season. We observed three events of M. glirina preying on rodents in pitfall traps, all with the same feeding behavior. We also report an individual climbing a tree at night, including a...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Amazon; Biology; Mato Grosso; Amazonian red-sided opossum; Monodelphis saci; Monodelphis emiliae.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400309

Development, characterization and stability of microemulsionated formulations of bacaba, Oenocarpus bacaba oil
Provedor de dados: 36
Autores: TORRES,Maycon de Paula Ribeiro; ESPRENDOR,Rhuan Vínicius de Freitas; BONALDO,Solange Maria; RIBEIRO,Elton Brito; VALLADÃO,Dênia Mendes de Sousa.
ABSTRACT Advances in nanotechnology, combined with the use of natural products, represent a promissing research field. Brazil is a country of a rich biodiversity, especially in the Amazon forest. Fruits commonly used by local communities, such as bacaba (Oenocarpus bacaba), are potentially important for prospection of industrial applications of natural products. In nanotechnology, microemulsions stand out for providing a modified release to conveyed substances. This work aimed to develop microemulsionated formulations of bacaba oil, characterize them and evaluate their stability. We determined the HLB (hydrophile-lipophilic balance) of bacaba oil for formulation development. Six formulations were selected from pseudoternary diagrams, which indicated the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microemulsion; Amazon; Native fruit; Nanotechnology; Carriers.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300246

Second capture of Promops centralis (Chiroptera) in French Guiana after 28 years of mist-netting and description of its echolocation and distress calls
Provedor de dados: 36
Autores: 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

Potential for shistosomiasis in a municipality of Rondônia, Brazilian Amazon
Provedor de dados: 36
Autores: 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

On the influences of the El Niño, La niña and Atlantic Dipole Paterni on the Amazonian Rainfall during 1960-1998
Provedor de dados: 36
Autores: SOUZA,Everaldo B de; KAYANO,Mary T; TOTA,Julio; PEZZI,Luciano; FISCH,Gilberto; NOBRE,Carlos.
The influence of the large-scale climatic variability dominant modes in the Pacific and in the Atlantic on Amazonian rainfall is investigated. The composite technique of the Amazon precipitation anomalies is used in this work. The basis years for these composites arc those in the period 1960-1998 with occurrences of extremes in the Southern Oscillation (El Niño or La Niña) and the north/south warm (or cold) sea surface temperature (SST) anomalies dipole pattern in the tropical Atlantic. Warm (cold) dipole means positive (negative) anomalies in the tropical North Atlantic and negative (positive) anomalies in the tropical South Atlantic. Austral summer and autumn composites for extremes in the Southern Oscillation (El Niño or La Niña) and independently for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seasonal rainfall; ENSO; Amazon; SST anomalous north-south dipole in the Atlantic; Chuva sazonal; ENOS; Amazônia; Dipolo norte-sul de anomalias de TSM.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000200305

Habitat use, fruit consumption, and population density of the black-headed night monkey, Aotus nigriceps, in southeastern Peru
Provedor de dados: 36
Autores: HELENBROOK,William. D.; WILKINSON,Madison L.; SUAREZ,Jessica A.
ABSTRACT The black-headed night monkey, Aotus nigriceps, has one of the largest distribution ranges of the 11 night monkey species found across Central and South America. Yet, only three studies have focused on their ecology, describing considerable variation in habitat, group composition, and population density. Therefore, we analyzed habitat use, group composition, population density, and diet of 14 groups at two field sites in southeastern Peru. All sampled groups were found in secondary tropical rainforest, often dominated by native bamboo species. Half of the observed sleeping sites were in bamboo stands, though groups also emerged from cane thickets and lianas. This contrasts with other Aotus studies which have found groups living in tree cavities...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Primates; Aotidae; Conservation; Owl monkey; Nocturnal; Habitat.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100037

First record of Vanilla labellopapillata (Orchidaceae: Vanilloideae) in the state of Amazonas, Brazil
Provedor de dados: 36
Autores: KRAHL,Dayse Raiane Passos; KRAHL,Amauri Herbert; CHIRON,Guy; TERRA-ARAÚJO,Mário Henrique.
ABSTRACT The first record of Vanilla labellopapillata is presented for the state of Amazonas, Brazil, in the region of Manaus, now the western limit of the species, which was previously known only from the type locality in the state of Pará. A brief description is provided and taxonomic and ecological aspects of the species are discussed in the light of this new finding.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Adolpho Ducke Forest Reserve; Amazon; Dense ombrophilous forest; Hemiepiphyte; Taxonomy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300260

Tree species diversity in a seasonally-dry forest: the case of the Pinkaití site, in the Kayapó Indigenous Area, Southeastern limits of the Amazon
Provedor de dados: 36
Autores: Salm,Rodolfo.
This study investigates patterns of forest structure and tree species diversity in an anthropogenic palm grove and undisturbed areas at the seasonally-dry Pinkaití research station, in the Kayapó Indigenous Area. This site, managed by the Conservation International do Brasil, is the most southeastern site floristically surveyed in the Amazon until now. The secondary and a nearby undisturbed forest were sampled in a group of 52 floristic plots of 0.0625-ha (25x25-m) where all trees with DBH &gt; 10 cm were measured and identified. The analyses were complemented with other two floristic plots of 1-ha (10x1000-m). The present study has shown that the Pinkaití, like other seasonally-dry forests, have great heterogeneity in forest structure and composition,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Anthropogenic forest; Arborescent palms; Floristics; Tropical forests.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000300009

Phenolic compounds from Virola venosa (Myristicaceae) and evaluation of their antioxidant and enzyme inhibition potential
Provedor de dados: 36
Autores: 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

First record of the bushy-tailed opossum, Glironia venusta, Thomas, 1912, (Didelphimorphia) from Manaus, Amazonas, Brazil
Provedor de dados: 36
Autores: 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

Description of behavioral patterns of Podocnemis erythrocephala (Spix, 1824) (Testudines: Podocnemididae) (Red-headed river turtle) in captivity, Manaus, Amazonas, Brazil
Provedor de dados: 36
Autores: 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

Feeding of the Brycon cephalus, Triportheus elongatus and Semaprochilodus insignis (osteichthyes, characiformes) larvae in Solimões/Amazonas River and floodplain areas.
Provedor de dados: 36
Autores: 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

Characterization of bacterial endophytes from the roots of native and cultivated Brazil nut trees (Bertholletia excelsa)
Provedor de dados: 36
Autores: 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

NEW Stylogaster AND RANGES OF CONOPIDAE (DIPTERA) FROM THE BRAZILIAN AND BOLIVIAN AMAZONIA
Provedor de dados: 36
Autores: CAMRAS,Sidney; PARRILLO,Philip P.
Conopid flies from the collection of the Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil, are examinied, of which two from Brazil are new, Stylogaster rafaelifrom Rondônia and S. ctenitarsafrom Roraima. This data, along with new material from Bolivia, expands the distributions of thirteen species of Conopidae. Figures for S. rafaelisp.n. and S. ctenitarsasp.n. are included.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conopidae; New species; Amazon; Distribution.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671995000400221

The seasonal diet of Aequidens tetramerus (Cichlidae) in a small forest stream in the Machado River basin, Rondônia, Brazil
Provedor de dados: 36
Autores: 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 (&lt; 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

Characterization of pesticide consumption in the county of Santarém, Pará, Brazil
Provedor de dados: 36
Autores: 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

The Larval Development of Palaemonid Shrimps from the Amazon region reared In the laboratory. VII. Abbreviated development of Pseudopalaemon amazonensis Ramos-Porto, 1979 (Crustacea: Decapoda: Caridea)
Provedor de dados: 36
Autores: MAGALHÃES,Célio; MEDEIROS,Nelma.
Larval development of the freshwater shrimp Pseudopalaemon amazonensis Ramos-Porto was studied in the laboratory based on the offspring of ovigerous females collected in a small “terra-firme” forest stream near Manaus, Brazil. Ovigerous females with a mean total length of 36.5 ± 1.9 mm carried 13-19 eliptical, yolk-rich eggs measuring 2.55 ± 0.16 x 1.64 ± 0.11 mm. The larval period consisted of 3 benthie stages and the larvae accomplished metamorphosis after 7-8 days without feeding. The newly-hatched larva had sessile eyes and all appendages, except for the uropods; chelipeds were present as uniramous buds, but walking legs were fully developed and functional. Descriptions and illustrations of the 3 larval and first juvenile stages are presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Palaemonidae; Pseudopalaemon amazonensis; Larval development; Amazon; Freshwater shrimp.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000400433

Modelling Amazonian forest eddy covariance data: a comparison of big leaf versus sun/shade models for the C-14 tower at Manaus I. Canopy photosynthesis
Provedor de dados: 36
Autores: Mercado,Lina; Lloyd,Jon; Carswell,Fiona; Malhi,Yadvinder; Meir,Patrick; Nobre,Antonio Donato.
In this study, we concentrate on modelling gross primary productivity using two simple approaches to simulate canopy photosynthesis: "big leaf" and "sun/shade" models. Two approaches for calibration are used: scaling up of canopy photosynthetic parameters from the leaf to the canopy level and fitting canopy biochemistry to eddy covariance fluxes. Validation of the models is achieved by using eddy covariance data from the LBA site C14. Comparing the performance of both models we conclude that numerically (in terms of goodness of fit) and qualitatively, (in terms of residual response to different environmental variables) sun/shade does a better job. Compared to the sun/shade model, the big leaf model shows a lower goodness of fit and fails to respond to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Modelling canopy photosynthesis; Rainforest; Amazon; Eddy-covariance.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000100009

Description of the female of Spodochlamys marahuaca Jameson &amp;amp; Ratcliffe, 2011 (Melolonthidae, Rutelinae, Anatistini) and additional records for the Brazilian species of the genus
Provedor de dados: 36
Autores: BENTO,Matheus; GROSSI,Paschoal Coelho.
ABSTRACT The previously unknown female of Spodochlamys marahuaca Jameson &amp; Ratcliffe, 2011 is described and illustrated for the first time based on two specimens collected in the region of the Juruá River, Amazonas state, Brazil. The specimens constitute a new record for Brazil. The identification key for species of Spodochlamys is updated, as well as the geographic distribution of the other two Brazilian species, S. caesarea Burmeister and S. iheringi Ohaus.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Amazon; Neotropical region; Geographic distribution; Taxonomy; Scarabaeoidea.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300193

A survey of the Anopheles Mosquitoes (Diptera: Culicidae) along the Acre And Purus Rivers, Amazon Basin, Brazil
Provedor de dados: 36
Autores: 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

Actinella species (Bacillariophyta) from an Amazon black water floodplain lake (Amazonas - Brazil)
Provedor de dados: 36
Autores: Melo,Sérgio; Torgan,Lezilda Carvalho; Raupp,Stela Valenti.
The genus Actinella Lewis was studied using planktonic samples from a black water floodplain lake in Central Amazon region. For species identification the taxa were morphological and morphometricaly analyzed on base in light microscope (LM) and scanning electronic microscope (SEM). Five species were registered: Actinella brasiliensis Grunow, A. guianensis Grunow, A. gracile Kociolek, A. mirabilis (Eulenstein ex Grunow) Grunow and A. robusta Hustedt. A. gracile is reported for the first time for Amazon State and black water systems and it is firstly documented with SEM. In addition, a review of geographic distribution of Actinella species in Brazilian Amazon region is given.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Actinella; Diatoms; Amazon; Black water; Floodplain lakes.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672010000200004

Anphira branchialis GEN. ET SP. NOV. (CRUSTACEA, ISOPODA, CYMOTHOIDAE) A GILL CAVITY PARASITE OF PIRANHAS (Serrasalmus SPP.) IN THE BRAZILIAN AMAZON
Provedor de dados: 36
Autores: 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

THE VEGETATION OF A SEASONAL VÁRZEA FOREST IN THE LOWER SOLIMÕES RIVER, BRAZILIAN AMAZONIA
Provedor de dados: 36
Autores: KLINGE,Hans; ADIS,Joachim; WORBES,Martin.
The species composition of the seasonal várzea forest growing on a bank of the Ilha de Marchantaria / lower Solimões-Amazonas River, Brazil was studied in an area of slightly less than one hectare. Two biomass plots were harvested. Forty-seven arboreal species representing 46 genera in 25 families were recorded. Tree density was 1086 per hectare. Total basal area was 45 m2 ha1. Mean species density was 6.5 ± 1.98 per 100 m2. The most abundant species were Crataeva benthamii(Capparidaceae), Laetia corymbutosa(Flacourtiaceae) and Vitex cymosa(Verbenaceae). The highest basal area per species was 10.2 m2 for Pseudobombax munguba(Bombacaceae). The common species are known to be typical floristic elements of the seasonal varzea forest. Above ground dry biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bioelements; Biomass; Floodplain; Seasonal várzea forest; Species composition; Structure.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671995000400201

Diversity of sand flies in domiciliary environment of Santarém, state of Pará, Brazil: species composition and abundance patterns in rural and urban areas
Provedor de dados: 36
Autores: 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

The occurrence of the Asian Clam Corbicula fluminea in the lowe amazon basin
Provedor de dados: 36
Autores: BEASLEY,Colin Robert; TAGLIARO,Claudia Helena; FIGUEIREDO,Wilsea Batista.
This paper records for the first time the presence of Corbicula fluminea (Philipi, 1844) in the Brazilian Amazon Basin. This exotic bivalve was found in localities on the Amazonas, Pará and Tocantins rivers. Density and population size structure were measured in some localities. Mean density is between 6.66 and 7.3 individuals m-2. Population size structure and the dates of the first records suggest that the introductions may have occurred between 1997 and 1998. The introductions may have been mediated by ocean-going vessels visiting the ports of Manaus and Belém. The potential impact of the invasion on native freshwater bivalves is discussed along with the need for monitoring and prevention of further introductions of non-indigenous bivalves in Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corbicula fluminea; Exotic species; Distribution; Amazon.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000200317

Characterization of the commercial fish production landed at Manaus, Amazonas State, Brazil
Provedor de dados: 36
Autores: BATISTA,Vandick da Silva; PETRERE JÚNIOR,Miguel.
The present work aims to update a series of information about the regional fishing production, by presenting and characterizing the contribution of the different sub-systems of the Amazon basin to the catch landed at the main fishing market of Manaus, Brazil, from 1994 to 1996. Collectors specifically hired for this function registered key information on the fisheries. Thirty nine types or groups of fish were found in the fishing production landed. Jaraqui (Semaprochilodus spp.), curimatã (Prochilodus nigricans), pacu (Myleinae), matrinchã (Brycon cephalus), sardine (Triportheus spp.), aracu (Anostomidae) and tambaqui (Colossoma macropomum) were the most important items during three consecutive years. In 1994 these items summed up 91.6% of the total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Fisheries; Amazon; Production.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000100053

Fisheries and fishing effort at the Indigenous Reserves Ashaninka/Kaxinawá, river Breu, Brazil/Peru
Provedor de dados: 36
Autores: Amaral,Benedito Domingues do.
This article aimed to describe the subsistence fisheries of traditional populations of three ethnic groups, one Ashaninka and two Kaxinawá, lying on the banks of the River Breu. Initially, monitors were trained to fill logbooks with data from fisheries of the villages during an annual cycle (august/1995 august/1996). Based on these data, it was realized an inventory of the most common fish species caught as well as one about the fishing environment. The following results were obtained: i) Indians prefer to use pools, locally known as "poços", for fishing; ii) the most common caught species are the "mandis" (35%, Pimelodidae), armored catfishes (Loricariidae), specially Hypostomus sp. (25%), the "curimatá" (9%, Prochilodus sp.) and the "saburus" (8%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Indigenous fisheries; Ashaninka; Kaxinawá; River Breu; Juruá basin.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672005000200004

Rapid assessment of the ichthyofauna of the southern Guiana Shield tributaries of the Amazonas River in Pará, Brazil
Provedor de dados: 36
Autores: DUTRA,Guilherme M.; FREITAS,Tiago M. S.; PRUDENTE,Bruno S.; SALVADOR,Gilberto N.; LEÃO,Manuela D. V.; PEIXOTO,Luiz A. W.; MENDONÇA,Marina B.; NETTO-FERREIRA,André L.; SILVA,Fabio R.; MONTAG,Luciano F. A.; WOSIACKI,Wolmar B.
ABSTRACT The Northern Pará Drainage System encompasses the left-bank tributaries of the Amazonas River in the southern Guiana Shield region of Pará state, Brazil. Five of the region’s state protected areas are considered strategic for the conservation of its biodiversity. In the present study, we assessed the ichthyofauna of the five state protected areas of the Northern Pará Drainage System. Seven expeditions were conducted between January 2008 and January 2009, which surveyed stretches of the Cuminá, Cuminapanema, Curuá, Jari, Mapuera, Nhamundá, and Paru rivers. These surveys yielded 286 species belonging to 38 families and eight orders, including seven new records of fish species for Brazil, six of which are also new records for the Amazon basin. Our...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Northern Pará Drainage System; Protected areas; Amazon; Inventory; Fish.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100024

Comparative study on hematological parameters of farmed matrinxã, Brycon amazonicus Spix and Agassiz, 1829 (Characidae: Bryconinae) with others Bryconinae species
Provedor de dados: 36
Autores: Tavares-Dias,Marcos; Affonso,Elizabeth Gusmão; Oliveira,Sarah Ragonha; Marcon,Jaydione Luiz; Egami,Mizue Imoto.
The aim of this study was not only to determine the red blood cells parameters, thrombocyte and leukocyte counts in farmed Brycon amazonicus (matrinxã), to compare these parameters among Bryconinae species from literature, and also to investigate the presence of special granulocytic cells in these fish. The results of the blood cells parameters here established for farmed B. amazonicus, a species of great economic importance in Brazilian aquaculture, could help a better understanding of the blood features in natural populations of this Amazon species. Blood parameters varied between Bryconinae species investigated, mainly the red blood cell counts, hemoglobin, hematocrit and mean corpuscular volume (MCV). The presence of the blood granulocytes, neutrophils...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leukocytes; Freshwater fish; Blood; Amazon; Brycon amazonicus; Bryconinae.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000400026

Amazon landforms and soils in relation to biological diversity
Provedor de dados: 36
Autores: 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

Exploring TM image texture and its relationships with biomass estimation in Rondônia, Brazilian Amazon
Provedor de dados: 36
Autores: 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

Arthropods obtained from the Amazonian tree species "Cupiuba" (Goupia glabra) by repeated canopy fogging with natural Pyrethrum
Provedor de dados: 36
Autores: ADIS,Joachim; HARADA,Ana Yoshi; FONSECA,Claudio Ruy V. da; PAARMANN,Wilfried; RAFAEL,José Albertino.
Two canopies of a widely distributed Amazonian tree species, Goupia glabra Aubl. (Celastraceae, height 38 and 45m) were fogged several times with 1% natural pyrethrum during the rainy and dry seasons (1991-1994) in the Adolpho Ducke Forest Reserve near Manaus/Brazil. Between 50 and 158 ind./m2 of arthropods were obtained per tree and fogging event. Hymenoptera, mostly Formicidae, and Diptcra dominated. A total of 95 ant species occurred on a single tree. Most ants were permanently foraging in the canopy and their recolonization after fogging seems to follow stochastic pathways. Data indicated an interaction between - 1) predating Formicidae and gall building Cecidomyiidae and - 2) Cecidomyiidae and the parasitic Hymenoptera.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canopy fogging; Pyrethrum; Arthropods; Recolonization; Interactions; Amazon; Neotropics.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300273

TWO UNUSUAL NEW GENERA OF PARAMPHISTOMIDAE (TREMATODA, DIGENEA) FROM FRESHWATER FISH OF THE BRAZILIAN AMAZON
Provedor de dados: 36
Autores: 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

Anatomical and histochemical comparison of the primary and adventitious roots of Attalea microcarpa (Arecaceae) at the initial growth stage
Provedor de dados: 36
Autores: CORRÊA,Marcos Melo; ARAÚJO,Maria Gracimar Pacheco de; MENDONÇA,Maria Sílvia de.
ABSTRACT We describe the anatomical structure of roots originating from the apocole of Attalea microcarpa compared to the primary root, by means of usual methods for optical microscopy. The adventitious roots are differentiated in the apocole associated to vascular bundles, and can remain as a single structure or branch. They have the basic root structure characteristic of Arecoideae palms, without schizogenous spaces, which are observed in the primary root, in addition to few air spaces. Mucilages, starch and proteins were present in both types of roots. Adventitious roots of the apocole are described for the first time in Arecaceae.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Amazon; Anatomy; Germination; Palm tree; Seedling; Root system.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400311

Predicting the distribution of forest tree species using topographic variables and vegetation index in eastern Acre, Brazil
Provedor de dados: 36
Autores: 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

Leaf anatomy of Qualea parviflora (Vochysiaceae) in three phytophysiognomies of the Mato Grosso State, Brazil
Provedor de dados: 36
Autores: ARIANO,Ana Paula Ramos; SILVA,Ivone Vieira da.
ABSTRACT Leaves have a variety of morphological and anatomical characters mainly influenced by climatic, edaphic and biotic factors. The aim of this study was to describe the anatomical leaf traits of Qualea parviflora from three phytophysiognomies. The studied phytophysiognomies were Amazon Savannah on rocky outcrops (ASR), Transition Rupestrian Cerrado (TRC), and Cerradão (CDA). Freehand sections of the leaf blade were made and stained with 0.5% astra blue and with basic fuchsin. From the adaxial and abaxial leaf surface, freehand paradermal sections were made for epidermis analysis. The Jeffrey´s method, with modifications, was used in the epidermis dissociation process. The samples from the TRC phytophysiognomy had relatively smaller ordinary epidermal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptations; Amazon; Cerrado; Environmental conditions.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000200119

On occurrence, habitat specificity and natural history of adult tiger beetles (Coleoptera: Carabidae: Cicindelinae) near Manaus, Central Amazonia, and key to the larvae of tiger beetle genera
Provedor de dados: 36
Autores: 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

Feeding ecology of Serrapinnus notomelas (Characiformes: Cheirodontinae) in small forest streams in the Machado River basin, Rondônia, Brazil
Provedor de dados: 36
Autores: COSTA,Igor David da; ROCHA,Vanessa Martins da.
ABSTRACT Studies on the trophic structure of fish give information on species autoecology and their role in the ecosystem. The aims of this study were to characterize the diet of Serrapinnus notomelas in small streams of the River Machado basin and to assess the effect of rainfall seasonality. Fish were collected bimonthly from July 2013 to May 2014 with seine nets and hand nets. The length of each specimen was measured to identify category classes. There were also measured the fullness index and volume of each ingested item, and these data were combined to obtain an alimentary index. We used ANOVA and Kruskal-Wallis to test for differences between length classes and fullness index, Chi-squared tests to detect seasonal differences in origin of food items...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Characidae; Trophic ecology; Igarapés; Ornamental fish; Amazon.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000100019

Spatial and temporal distribution of a tiger beetle guild (Coleoptera: Carabidae: Cicindelinae) along a 105m long transect in the reserva florestal A. Ducke near Manaus (Central Amazonia)
Provedor de dados: 36
Autores: 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

Relationship of Neotropical otter vestiges with environmental and anthropogenic factors
Provedor de dados: 36
Autores: ANDRADE,Ana Marta; ARCOVERDE,Danilo Leal; ALBERNAZ,Ana Luisa.
ABSTRACT The Neotropical otter, Lontra longicaudis (Mustelidae) is a semi-aquatic mustelid that exploits a variety of freshwater habitats. To understand the relative influence of human activities and environmental factors affecting its distribution and habitat use, we conducted systematic, seasonal surveys of otter signs along the middle Guamá River, in Pará state in the eastern Brazilian Amazon. We applied generalized additive models to compare distribution of otters along the river with data collected on environmental factors (landcover type derived from satellite imagery, and in situ measurements of physicochemical water characteristics) and anthropogenic factors (fishing gear in the river and human habitation along the river). Most otter signs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthropogenic impact habitat use Lontra longicaudis; Amazon.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300183

ANTHROPOGENIC IMPACTS ON YELLOW-SPOTTED RIVER TURTLE Podocnemis unifilis (REPTILIA: PODOCNEMIDIDAE) FROM THE BRAZILIAN AMAZON
Provedor de dados: 37
Autores: Santos ARRAES,Débora Regina; Albuquerque CUNHA,Helenilza Ferreira; TAVARES-DIAS,Marcos.
The purpuse of this study was to investigated the influence of anthropogenic impacts on Podocnemis unifilis nesting on a stretch from Falsino river, with two forest reserves, and one urban area on the Araguari river, state of Amapá, eastern Amazon (Brazil). A total of 180 nests were found, being 89.4 % in the forest reserves and only 10.6 % in urban areas. On Falsino river, we observed a spawning pattern, because the number of nests was correlated to the length and width of the nesting locations. On Araguari river, the P. unifilis nests were generally found in areas with surrounding vegetation up to 5 meters in height, minimum distance of 120 meters from residences and immediately or after places of higher exploration of pebbles. Females from Falsino river...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Eggs; Freshwater turtle; Neonates; Nests.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000200009

HEMATOLOGYCAL AND BLOOD BIOCHEMISTRY PARAMETERS OF CAPTIVE BIG-HEADED AMAZON RIVER TURTLES, Peltocephalus dumerilianus (TESTUDINES: PODOCNEMIDIDAE)
Provedor de dados: 37
Autores: ANSELMO,Neiana Pereira; FRANÇA,Mônica Ferreira de Lima; SANTOS,Mareio Quara de Carvalho; PANTOJA-LIMA,Jackson; SILVA,Cleide Karoline Pereira da; ARIDE,Paulo Henrique Rocha; OLIVEIRA,Adriano Teixeira de.
ABSTRACT The determination of hematological values is used to obtain knowledge about the health conditions of animal species. The big-headed Amazon River turtles, (Peltocephalus dumerilianus) are considered one of the least known testudine species concerning their biology and health status. Herein, we determined the hematological and plasma biochemical parameters of17 (eight males and nine females) adult P. dumerilianus to provide reference interval values for clinically healthy individuals. We collected the blood samples by puncturing the femoral vein using long heparinized hypodermic syringes. Sexual dimorphism for individuals was determined by external observation of the shape of the plastron. The average values obtained for the ten hematological and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Blood; Hematology; Physiology; Reptiles.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000200207

Bryoflora of the municipalities of Soure and Cachoeira do Arari, on Marajó Island, in the state of Pará, Brazil
Provedor de dados: 39
Autores: Brito,Eliete da Silva; Ilkiu-Borges,Anna Luiza.
This study aims to investigate the richness and ecological aspects (ecosystem and substrate) of mosses and liverworts at two municipalities on Marajó Island, in the state of Pará, Brazil. The study area (6615 km²) encompasses the municipalities of Soure and Cachoeira do Arari. Bryophytes were collected from the 10th to the 16th of January, 2007, during random visits along existing trails or during the forging of new trails, from all possible types of vegetation, regardless of the type of substrate. The ecosystems visited in the study area were capoeira (secondary vegetation, growing on land that has been burned or cleared), teso (vegetation growing on areas of land at an elevation slightly higher than the water line during flood season), floodplain forest,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bryophyta; Marchantiophyta; Bryophytes; Amazon; Neotropics.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100013

Late Holocene paleoenvironments of the floodplain of the Solimões River, Central Amazonia, based on the palynological record of Lake Cabaliana
Provedor de dados: 39
Autores: Sá,Natália de Paula; Absy,Maria Lúcia; Soares,Emílio Alberto Amaral.
ABSTRACT The core PD-67 of 160 cm depth was collected from the delta of Lake Cabaliana situated on the Solimões River. Seventeen samples were removed for palynological and sedimentological analysis and three for radiocarbon analysis. Two dry periods, both in the Late Holocene, were observed (2800-2550 cal yr BP, 1450-550 cal yr BP) separated by a wetter phase (2550-1450 cal yr BP). In 2800-2550 cal yr BP, varzea forests of Alchornea, Symmeria, Cecropia, Alternanthera and Asteraceae were predominant. Beginning in 2,550-1450 cal yr BP, the varzea was characterized by pioneer elements, such as Cassia, Laetia, Mabea, Symmeria and Cecropia, and by the expansion of Poaceae, Cyperaceae, Sagittaria, Montrichardia and Asteraceae. In 1450-550 cal yr BP the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Pollen; Quaternary; Rainfall; Terra firme forest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300473

Composition, diversity and structure of vascular epiphytes in two contrasting Central Amazonian floodplain ecosystems
Provedor de dados: 39
Autores: Quaresma,Adriano C.; Piedade,Maria Teresa F.; Feitosa,Yuri Oliveira; Wittmann,Florian; Steege,Hans ter.
ABSTRACT Research focusing on assemblages of vascular epiphytes in the Amazon are scarce. This is especially true for Amazonian floodplain forests, for which only two previous studies have been published. We compared composition, richness and structure of epiphyte assemblages in white-water and black-water floodplains (várzea and igapó) in Central Amazonia in order to close knowledge gaps concerning the distribution and richness of epiphytes. We established sixteen 25x25 m plots in each forest type, and counted and identified all species of vascular epiphytes occurring on trees with a diameter at breast height (DBH) ≥10 cm. We observed a clear distinction in epiphytic species composition (r2=0.83, p=0.001) and diversity (t=3.24, P=0.003) between the two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Biodiversity; Floodplains; Igapó forests; Várzea forests.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400686

Sporepolinic morphology of fluvial terrace sediments in the Western Amazon
Provedor de dados: 39
Autores: Silva,Mayra Nina Araujo; Absy,Maria Lúcia; Latrubesse,Edgardo M.; Albuquerque,Patrícia Maia Correia de.
ABSTRACT Morphological descriptions were made for pollen grains and spores extracted from samples from three sedimentary sections - Chandless 1, Purus 10 and Purus 30 - from fluvial terraces on the Chandless and Purus rivers, Acre State, Brazil. Level CH1-12 at Chandless 1 was C14-dated to 4861 - 5050 cal yr BP, P10-3 of Purus 10 was dated through the OSL method at 8200 +/- 65 yr BP, while P30-6 at Purus 30 was C14 dated to 7845 - 7998 cal yr BP. For pollen analysis, 2 cm3 of each sample was removed, treated with potassium hydroxide (KOH) and acetolysed, followed by palymorph separation with bromoform/alcohol density 2.0 solution. A total of 49 palynomorphs were morphologically described (39 pollen types and 10 Pteridophyte spores). The most frequent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acre; Amazon; Chandless; Palynomorphs; Purus.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100017

Pollen sources used by Frieseomelitta Ihering 1912 (Hymenoptera: Apidae: Meliponini) bees along the course of the Rio Negro, Amazonas, Brazil
Provedor de dados: 39
Autores: 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

Poaceae communities in the savannas of the Amazon Estuary in Brazil
Provedor de dados: 39
Autores: Rocha,Antônio Elielson Sousa; Miranda,Izildinha Souza.
We sought to identify the major environmental factors that affect the diversity and distribution of Poaceae in the savannas of the Amazon Estuary. The study was conducted across seven areas of savanna in the Amazon Estuary, within which 160 subplots of 1 m² each were established within four 10 × 100 m plots. Soil samples were collected at a depth of 0-20 cm. A total of 24 Poaceae species were recorded. Only two were common to all of the areas studied (Axonopus aureus P. Beauv. and Anthaenantia lanata (Kunth) Benth). The edaphic factors that most influenced the Poaceae in the savannas studied were organic matter, coarse sand, and silt contents. Conversely, rainfall had no effect. The floristic and structural characteristics of the savannas studied suggest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Grasses; Panicoideae; Plant-soil interactions; Poaceae.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400010

Root carbohydrate storage in young saplings of an Amazonian tidal várzea forest before the onset of the wet season
Provedor de dados: 39
Autores: Scarano,Fabio Rubio; Cattânio,José Henrique; Crawford,Robert M.M.
Root starch and glucose content were measured for young saplings of 18 Amazonian tidal várzea tree species during a dry season. The pattern of carbohydrate storage depended on the type of plant involved and soil topography which is directly linked to flood regime. Most plants showed high root carbohydrate content at this point in the dry season, however, several typically flood-tolerant species (particularly palm trees) presented a low root carbohydrate content, suggesting a strategy of acquiring reserves during the wet season to survive the dry season, when depletion occurs. Plant survival in these flood-prone forests seems to be the result of more than only one adaptive mechanism.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Carbohydrate; Flooding; Roots; Tidal várzea.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061994000200002

Phenology of the multi-use tree species Carapa guianensis in a floodplain forest of the Amazon Estuary
Provedor de dados: 39
Autores: Dantas,Adelson R.; Lira-Guedes,Ana C.; Mustin,Karen; Aparício,Wegliane C. S.; Guedes,Marcelino C.
ABSTRACT Carapa guianensis is a multi-use tree species that is used for the production of timber and non-timber forest products (NTFPs) that are used and sold by rural Amazonian populations. Here we aimed to evaluate the phenophases of C. guianensis in várzea forest and relate them to climatic seasonality. Phenophases of flowering (flower buds and open flowers), fruiting (unripe and ripe fruits), and leaf flush and leaf fall were recorded for 30 individual trees during a 25 month period. Relationships between rainfall and the proportion of trees in each phenophase were tested using Generalised Linear Models with quasi-binomial errors. Flowering was found to peak in the driest months of the year (September to December), while fruiting peaked during the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Carapa guianensis; Crabwood tree ecology; Florestam; Meliaceae; Phenology; Phenophases; Sustainable forest management.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400618

Capacidade de solubilização de fosfatos e eficiência simbiótica de rizóbios isolados de solos da Amazônia - DOI: 10.4025/actasciagron.v32i2.3185
Provedor de dados: 1
Autores: Chagas Junior, Aloisio Freitas; Universidade Federal do Tocantins; Oliveira, Luiz Antonio de; Intituto Nacional de Pesquisas da Amazônia; Oliveira, Arlem Nascimento de; Universidade Federal do Amazonas, Manaus; Willerding, André Luiz; Centro de Biotecnologia da Amazônia.
Em solos com baixa disponibilidade de fósforo, como os de terra firme da Amazônia, a habilidade de estirpes de rizóbio de solubilizar compostos de fosfato inorgânico é extremamente importante. Assim, o objetivo deste trabalho foi determinar a capacidade de solubilização de fosfato de cálcio (P-Ca) e fosfato de alumínio (P-Al) de isolados de rizóbio de solos na Amazônia em laboratório e a eficiência simbiótica dos isolados em aumentar os conteúdos de N e P em caupi. Os isolados de rizóbio foram avaliados em meios específicos para solubilização desses fosfatos por um período de 15 dias, obtendo-se os seus índices de solubilização (I.S.). Dos 205 isolados avaliados, 68 solubilizaram P-Ca, 47 solubilizaram  P-Al e 32 solubilizaram tanto P–Ca quanto P–Al. Entre...
Palavras-chave: 5.01.02.04-4 Fósforo; Amazônia; Ecologia microbiana Microbiologia e bioquímica do solo Phosphorus; Amazon; Microbial ecology.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3185

Relationship between water transparency and physical-chemical variables in lakes of the western Amazon, Brazil - doi: 10.4025/actascibiolsci.v34i1.9311
Provedor de dados: 3
Autores: Trevisan, Giselle Vanessa; Instituto Nacional de Pesquisas Espaciais - INPE; Jardim-Lima, Dayson José; Instituto Nacional de Pesquisas Espaciais - INPE.
Water transparency is one of the main indicators of seasonal changes from the water level in lacustrine systems, but other environmental spatial and temporal variables can act jointly on water transparency. The diagnosis of interactions among physical-chemical variables and water transparency can be made by fitting statistical models based on multiple regression analysis. The objective of this study is to evaluate the set of limnologic variables that best predict the seasonal variation in water transparency in lakes of the western Amazon. These data were collected in both the drought and flood seasons in 78 lakes of the Mamirauá Reserve for Sustainable Development (RDSM). The delineation of the sampling followed the choice of variables, the analysis of...
Tipo: Composição bioquímica da água.
Palavras-chave: Ecologia de Ecossistemas. Limnologia. water transparency; Regression analysis; Lakes; Amazon; Mamirauá Reserve for Sustainable Development Ecologia de Ecossistemas (2.05.02.00-1).
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9311

Flutuação anual e interanual da riqueza de espécies de desmídias (Chlorophyta – Conjugatophyceae) em um lago de inundação amazônico de águas pretas (Lago Cutiuaú, Estado do Amazonas, Brasil) - DOI: 10.4025/actascibiolsci.v31i3.1050
Provedor de dados: 3
Autores: Melo, Sérgio; INPA; Souza, Karla Ferreira; INPA.
Nesta pesquisa foi avaliada a flutuação sazonal e interanual da riqueza específica de desmídias ao longo de diferentes períodos do ciclo hidrológico de 2002 a 2004, em um lago de inundação de águas pretas da bacia do rio Negro, no Estado do Amazonas. O lago estudado apresentou marcada flutuação anual na profundidade da coluna d’água e elevados valores de temperatura ao longo de todo o estudo, enquanto os valores de pH e condutividade elétrica foram baixos. Foram identificadas 105 espécies de desmídias distribuídas nas famílias Closteriaceae, Gonatozygaceae e Desmidiaceae. Destas, 23 constituem primeira citação para o Estado do Amazonas e se encontram ilustradas no presente estudo. O período de enchente foi o que apresentou maior riqueza de espécies, em...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas lagos de inundação; Desmidiales; Amazônia; Águas pretas Ecologia floodplain lakes; Desmidiales; Amazon; Black water.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1050

Richness and composition of macrophyte assemblages in four Amazonian lakes - doi: 10.4025/actascibiolsci.v35i3.11602
Provedor de dados: 3
Autores: Mormul, Roger Paulo; Universidade Estadual de Maringá; Thomaz, Sidinei Magela; Universidade Estadual de Maringá; Vieira, Lisandro Juno Soares; Universidade Federal do Acre.
Aquatic macrophytes are an important component in the structure of lakes in Neotropical floodplains, for example, because they support a high diversity of invertebrates and vertebrates. In this paper, we tested whether or not the variability of macrophyte assemblages is lower in spatially close quadrats than among quadrats of different lakes. The study was carried in four lakes in a large Amazonian floodplain (Purus river), where floating meadows were investigated. A total of 49 taxa of macrophytes were found. Five species dominated and three species were rare. Taxa richness, composition and beta diversity differed more between than within lakes. Because high beta diversity was found among the lakes, they should be considered individually important for...
Palavras-chave: 2.05.00.00-9 Purus river; Oxbow lake; Dry season; Amazon; Floating meadows; Diversity Ecologia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/11602

Parasitic fauna of Hyphessobrycon takasei and Hyphessobrycon amapaensis (Osteichthyes: Characidae), ornamental fish of two basins from Amapá state, Brazil
Provedor de dados: 3
Autores: 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

Experimental study on the efficiency of different types of traps and baits for harvesting Macrobrachium amazonicum (Heller, 1862)
Provedor de dados: 3
Autores: Bentes, Bianca; Martinelli-Lemos, Jussara Moretto; Paes, Eduardo Tavares; Fernandes, Suelly Cristina Pereira; Paula, Jeanne Duarte; Isaac, Victoria.
Macrobrachium amazonicum is a freshwater prawn endemic to South America with wide distribution in Brazilian Amazon rivers. In estuary and freshwater streams of the Pará State, they are captured with different types of traps locally know matapi. This study evaluated the efficiency of traps of different sizes (large, medium and small) and baits (babassu coconut and fish) for sampling this shrimp. Samplings were conducted with 24 traps with different treatments (trap size and bait). We captured 909 specimens. Higher mean catches were observed in traps baited with babassu coconut. Interactions between babassu coconut bait and medium matapi (BM-M), and fish bait and large matapi (FISH-L) were significant. Carapace length (CL) varied significantly between sites...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Guajara Bay; North Coast; Freshwater prawn.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22852

Diversity of parasites in wild Astronotus ocellatus (Perciformes, Cichlidae), an ornamental and food fish in Brazil
Provedor de dados: 42
Autores: TAVARES-DIAS,MARCOS; NEVES,LIGIA R.
ABSTRACT The community composition of parasites was characterized in Astronotus ocellatus from a tributary of the Amazon River, northern Brazil. The prevalence was 87.9%, and a total of 526,052 parasites were collected, with a mean of 15,941 parasites per host. Nine taxa of ecto- and endo-parasites were identified, but Ichthyophthirius multifiliis was the dominant species, while Piscinoodinium pillulare, Clinostomum marginatum and Argulus multicolor were the least prevalent parasites. The parasite community was characterized by a low species richness, low diversity and low evenness. Host body size was not found to influence the composition of the parasite community, and there was no significant correlation between abundance of any parasite species and host...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggregation; Amazon; Ectoparasites; Endoparasites; Freshwater fish.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502305

The impacts of land use changes in the mercury flux in the Madeira River, Western Amazon
Provedor de dados: 42
Autores: Lacerda,Luiz D.; Bastos,Wanderley R.; Almeida,Marcelo D.
Changes in hydrochemistry and Hg distribution in the Madeira River from Porto Velho to the confluence with the Amazon River were studied in two cruises in 1997 and 2002. Water conductivity was similar in both periods, but the pH was significantly higher in 2002, in particular along the middle reaches of the river. Total suspended matter concentrations also increased from 1997 to 2002 along the same river portion, which is a result of forest conversion to other land uses, in particular pastures and agriculture accelerated during the interval between the cruises. Dissolved Hg concentrations were similar along the river in both cruises, but particulate Hg concentrations increased significantly along the middle portion of the river, although the suspended...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deforestation; Mercury; Hydrochemistry; Contamination; Amazon.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100007

Population structure and allometry of Podocnemis unifilis (Testudines, Podocnemididae) in a protected area upstream Belo Monte dam in Xingu River, Brazil
Provedor de dados: 42
Autores: MIORANDO,PRISCILA S.; GIARRIZZO,TOMMASO; PEZZUTI,JUAREZ C.B.
ABSTRACT Amazon river turtles are increasingly threatened by habitat loss and alteration due to the Brazilian energy policy based on construction of hydroelectric dams, meanwhile, populational studies remain scarce. We described the population structure, and established body allometric relationships of Podocnemis unifilis in the Terra do Meio Ecological Station in the Iriri River, tributary of the Xingu River upstream the Belo Monte dam under construction Turtles were captured by hand net and diving in 2012 and 2013 dry seasons, and 2013 rainy season. A total of 728 males, 296 females and four juveniles were captured. Adult sex ratio was male-biased by 9.15♂:1&amp;#9792;. Females were significantly larger than males. Mean straight carapace length was 268.9...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Clear water river; Length-weight relationship; Sex ratio; Tracajá.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502067

Acute toxicity and histopathology in ornamental fish amazon bluespotted corydora (Corydoras melanistius) exposed to formalin
Provedor de dados: 42
Autores: Santos,Rudã F.B.; Dias,Henrique M.; Fujimoto,Rodrigo Y.
The objective of this work was to evaluate the acute toxicity of formalin and histopathological effects on the Amazon ornamental fish, bluespotted coridora (Corydoras melanistius). A randomized design was used, with ten concentrations of formalin (40%) (0, 3, 6, 12, 25, 50, 100, 150, 200 and 250mg.L-1) with four replicates and five fish per container (3L) in static system for 96 hours. The moribund fish were killed and fixed in 10% formalin to proceed the histopathological analysis of gill, liver and kidney. At the end of this experiment the following mortality rates (%) were obtained in increasing order of exposure: 0, 0, 0, 0, 0, 65, 85, 100, 100 and 100%. The lethal concentration 50% (LC50-96h (I)) estimated was 50.76 mg.L-1 with regression of y =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lethal concentration; Corydora; Formaldehyde; Toxicity; Histology; Amazon.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400014

Biodiversity studies through public-private partnership (PPP): The case of Fazenda São Nicolau in the northwest of Mato Grosso
Provedor de dados: 42
Autores: RODRIGUES,DOMINGOS J.; VAZ-DE-MELLO,FERNANDO Z.; SILVEIRA,ROBERTO M.L.
Abstract: Peugeot-ONF Forest Carbon Sink Project, located at Fazenda São Nicolau (FSN) in Cotriguaçu Municipality, is a public-private initiative and has been supported by several French and Brazilian institutions. Its Research Program includes studies aiming Biodiversity Conservation, Ecology, Carbon Dynamics, Silvicultural Techniques. FSN comprises a high richness of species with more than 20 new species of beetles (Histeridae, Scarabaeidae e Melolonthidae) described among them one endemic genus. A quick overview of the SuperFamily Scarabaeoidea within the FSN area registered 260 species which nearly 100 species might be new to Science. One new species of fish as well as research with amphibian toxins as tools to treat cancer and malaria are also done...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Amazon; Carbon Sink Project; Refugee.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000600608

Spider species richness and sampling effort at Cracraft´S Belém Area of Endemism
Provedor de dados: 42
Autores: RODRIGUES,BRUNO V.B.; AGUIAR-NETO,MANOEL B.; OLIVEIRA,UBIRAJARA DE; SANTOS,ADALBERTO J.; BRESCOVIT,ANTONIO D.; MARTÍNS,MARLÚCIA B.; BONALDO,ALEXANDRE B.
ABSTRACT A list of spider species is presented for the Belém Area of Endemism, the most threatened region in the Amazon Basin, comprising portions of eastern State of Pará and western State of Maranhão, Brazil. The data are based both on records from the taxonomic and biodiversity survey literature and on scientific collection databases. A total of 319 identified species were recorded, with 318 occurring in Pará and only 22 in Maranhão. About 80% of species are recorded at the vicinities of the city of Belém, indicating that sampling effort have been strongly biased. To identify potentially high-diversity areas, discounting the effect of variations in sampling effort, the residues of a linear regression between the number of records and number of species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Araneae; Diversity; Fragmentation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401543

Modeling the impact of net primary production dynamics on post-disturbance Amazon savannization
Provedor de dados: 42
Autores: SENNA,MÔNICA C.A.; COSTA,MARCOS H.; DAVIDSON,ERIC A.; NOBRE,CARLOS A.
Amazon tropical forests are being replaced by pasturelands and croplands, but they sometimes revert to regrowth forest when abandoned after a period of agricultural use. Research suggests that this secondary regrowth is limited by climate and nutrient availability and, using a coupled biosphere-atmosphere model, we investigated patterns in the regrowth of the Amazon rainforest after a full deforestation event, considering different types of nutrient stress. We found that, over a 50 year regrowth period, the reduction of precipitation caused by large-scale deforestation was not sufficient to prevent secondary forest regrowth, but this decrease in precipitation combined with nutrient limitation, due to logging and frequent fires, did indeed prevent forest...
Palavras-chave: Amazon; Climate; Deforestation; Ecosystem model; Net primary production; Savannization.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200621

Community ecology of parasites in four species of Corydoras (Callichthyidae), ornamental fish endemic to the eastern Amazon (Brazil)
Provedor de dados: 42
Autores: FERREIRA,MAKSON M.; PASSADOR,RAFAEL J.; TAVARES-DIAS,MARCOS.
Abstract Abstract: This study compared the parasites community in Corydoras ephippifer, Corydoras melanistius, Corydoras amapaensis and Corydoras spilurus from tributaries from the Amapari River in State of Amapá (Brazil). A total of 151 fish of these four ornamental species were examined, of which 66.2% were parasitized by one or more species, and a total of 732 parasites were collected. Corydoras ephippifer (91.2%) and C. spilurus (98.8%) were the most parasitized hosts, while C. amapaensis (9.6%) was the least parasitized. A high similarity (≅ 75%) of parasite communities was found in the host species. Hosts were parasitized by Procamallanus (Spirocamallanus) inopinatus, Camallanus sp. and metacercariae of digeneans. The parasites had an aggregated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Diversity; Helminths; Parasites; Freshwater fish.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100608

Perception of local inhabitants regarding the socioeconomic impact of tourism focused on provisioning wild dolphins in Novo Airão, Central Amazon, Brazil
Provedor de dados: 42
Autores: 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

Seasonality of reproduction of epiphytic bryophytes in flooded forests from the Caxiuanã National Forest, Eastern Amazon
Provedor de dados: 42
Autores: CERQUEIRA,GABRIELA R.; ILKIU-BORGES,ANNA LUIZA; FERREIRA,LEANDRO V.
This work aimed to recognize the reproductive biology of the epiphytic bryoflora of phorophytes of Virola surinamensis (Rol. ex. Rottb.) Warb. in várzea and igapó forests in the Caxiuanã National Forest, to answer the following question: The reproductive period of the bryophyte species is influenced by the environment due the climatic seasonality present in flooded forests, being higher the occurrence of the sexual and asexual reproduction in the rainiest months? The bryophytes were identified and analyzed for the type of reproduction, sexual system and reproductive structures. In total, 502 samples of bryophytes were analyzed, resulting in 54 species, of which 34 were fertile. The comparison of the fertility of the species in different environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bryoflora; Fertility; Igapó forest; Várzea forest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000300903

Use of synthetic aperture radar for recognition of Coastal Geomorphological Features, land-use assessment and shoreline changes in Bragança coast, Pará, Northern Brazil
Provedor de dados: 42
Autores: Souza-Filho,Pedro W. M.; Paradella,Waldir R.
Synthetic Aperture Radar (SAR) images are being used more extensively than ever before for geoscience applications in the moist tropics. In this investigation, a RADARSAT1-1 C-HH SAR image acquired in 1998 was used for coastal mapping and land-cover assessment in the Bragança area, in the northern Brazil. The airborne GEMS 1000 X-HH radar image acquired in 1972 during the RADAM Project was also used for evaluating coastal changes occurring over the last three decades. The research has confirmed the usefulness of RADARSAT-1 image for geomorphological mapping and land-cover assessment, particularly in macrotidal mangrove coasts. It was possible to map mangroves, salt marshes, chenier sand ridges, dunes, barrier-beach ridges, shallow water morphologies and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geomorphology; Coastal changes; Remote sensing; Mangrove; Amazon.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000300007

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil
Provedor de dados: 42
Autores: MENDONÇA,BRUNO A.F. DE; FERNANDES FILHO,ELPÍDIO I.; SCHAEFER,CARLOS E.G.R.; MENDONÇA,JÚLIA G.F. DE; VASCONCELOS,BRUNO N.F.
ABSTRACT Viruá National Park encompasses a vast and complex system of hydromorphic sandy soils covered largely by the white sand vegetation ("Campinarana") ecosystem. The purpose of this study was to investigate a vegetation gradient of "terra-firme"-white sand vegetation at the Viruá National Park. Nine plots representing three physiognomic units were installed for floristic and phytosociological surveys as well as to collect composite soil samples. The data were subjected to assessments of floristic diversity and similarity, phytosociological parameters and to statistical analyses, focused on principal components (PC) and canonical correspondence analysis (CCA). The vegetation of the Campinaranas types and Forest differed in biomass and species density....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Campinarana; Canonical correlation; Monodominant species; Phytosociology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301269

Endoparasites of wild animals from three biomes in the State of Mato Grosso, Brazil
Provedor de dados: 45
Autores: Ramos,D.G.S.; Santos,A.R.G.L.O.; Freitas,L.C.; Correa,S.H.R.; Kempe,G.V.; Morgado,T.O.; Aguiar,D.M.; Wolf,R.W.; Rossi,R.V.; Sinkoc,A.L.; Pacheco,R.C.
ABSTRACT The population of wild animals is regulated by many biotic and abiotic factors, and parasites are a biotic factor that affects the dynamic and density of host populations. From 2002 to 2014, 62 wild animals from the biomes Pantanal, Amazon, and "Cerrado" (or Savanna), which died in attendance in the veterinary hospital or have been road-killed, underwent necropsy for parasitological examination. Overall, 36 species of parasites were identified from 24 host species. Among the parasites, the most prevalent order was Oxyurida (29.1%), followed by Strongylida (20.9%), Spirurida (19.4%), Ascaridida (16.2%), Pentastomida (3.2%), Echinostomida (3.2%), Gygantorhynchia (3.2%), Rhabditida (1.6%), Plagiorchiida (1.6%), and Monilimorfida (1.6%), especially...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helminths; Parasitism; Amazon; Cerrado; Pantanal.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300571

Colorectal cancer DNA methylation patterns from patients in Manaus, Brazil
Provedor de dados: 48
Autores: Almeida,Fabiana Greyce Oliveira; Aquino,Priscila Ferreira de; Souza,Afonso Duarte Leäo de; Souza,Antonia Queiroz Lima de; Vinhote,Sonia do Carmo; Mac-Cormick,Thais Messias; Silva,Marcelo Soares da Mota; Chalub,Sidney Raimundo Silva; Fischer,Juliana de Saldanha da Gama; Carvalho,Paulo Costa; Carvalho,Maria da Gloria da Costa.
BACKGROUND: DNA methylation is commonly linked with the silencing of the gene expression for many tumor suppressor genes. As such, determining DNA methylation patterns should aid, in times to come, in the diagnosis and personal treatment for various types of cancers. Here, we analyzed the methylation pattern from five colorectal cancer patients from the Amazon state in Brazil for four tumor suppressor genes, viz.: DAPK, CDH1, CDKN2A, and TIMP2 by employing a polymerase chain reaction (PCR) specific to methylation. Efforts in the study of colorectal cancer are fundamental as it is the third most of highest incidence in the world. RESULTS: Tumor biopsies were methylated in 1/5 (20 %), 2/5 (40 %), 4/5 (80 %), and 4/5 (80 %) for CDH1, CDKN2A, DAPK, and TIMP2...
Tipo: Journal article
Palavras-chave: Methylation; Colorectal cancer; Amazon; Epigenetic.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100050

Amphibians of varzea environments and floating meadows of the oxbow lakes of the Middle Purus River, Amazonas, Brazil
Provedor de dados: 49
Autores: Ramalho,Werther Pereira; Andrade,Murilo Sousa; Matos,Lucicléia Railene Assis de; Vieira,Lisandro Juno Soares.
Despite the historical knowledge on amphibians of the Purus River basin, basic information on assemblages is fragmented, with gaps in knowledge existing at various scales, which limits conservation strategies. This study provides information on the composition, richness and abundance of the amphibian fauna in varzea environments and floating meadows of the oxbow lakes of the Middle Purus River between the Boca do Acre and Pauiní municipalities, Amazonas, Brazil. We sampled six oxbow lakes using forty-seven 200-meter transects, distributed among the "floating meadows," "high varzea" and "low varzea," from April to January 2014. We recorded 59 species, with the family Hylidae being predominant. This amphibian fauna represents approximately 19% of the species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Floodplain; Flood pulse; Diversity; Conservation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000100201

Composition and trophic structure of the ichthyofauna from a stream downriver from Santo Antonio Falls in the Madeira River, Porto Velho, RO
Provedor de dados: 49
Autores: Araújo,Túlio Raimundo de; Ribeiro,Ariana Cella; Doria,Carolina Rodrigues da Costa; Torrente-Vilara,Gislene.
Belmont Stream is the main tributary of the Madeira River in the area immediately downriver from the Santo Antonio Fall. Samplings were carried out using gill nets in the mouth of this stream between May 2005 and April 2006 and resulted in a list of 74 species. The analyses included values of composition, constancy of occurrence, species richness, abundance, Catch Per Unit of Effort and trophic structure about the ten most abundant species. Characiformes and Siluriformes were dominant order in the samples and Curimatidae (popularly known as "branquinhas") was the most abundant family, represented by Psectrogaster rutiloides (32.57% of the collected specimens), Potamorhina altamazonica (10.72%), and Potamorhina latior (7.79%). The most of species were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Richness; Dominance; CPUE; Migratory route; Amazon.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000300001

Arctiini Leach, [1815] (Lepidoptera, Erebidae, Arctiinae) of the Brazilian Amazon. IV - Subtribe Euchromiina Butler, 1876
Provedor de dados: 49
Autores: Teston,José Augusto; Ferro,Viviane Gianluppi.
Abstract: The Euchromiina moths comprise 735 species in the neotropics. Here we provide a list of Euchromiina species from the Brazilian Amazon. The list was produced from specimens deposited in the most important Brazilian collections and from literature data. Nearly 30% (219) of the neotropics Euchromiina species were recorded, including 13 new occurrences for the Brazilian Amazon. Santarém and Belém were the municipalities with the highest number of species records, with 96 and 74, respectively. Although the number of Euchromiina records is high in the Amazon, this value is underestimated because the fauna was never sampled in the vast majority of the biome. This is a worrying scenario because the Amazon has the world highest absolute rate of forest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Tiger moths; Inventory; Noctuoidea; Wasp Moths.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400309

Arctiini Leach, [1815] (Lepidoptera, Erebidae, Arctiinae) of the Brazilian Amazon. III - Subtribe Ctenuchina Kirby, 1837
Provedor de dados: 49
Autores: Teston,José A.; Abreu,Débora S. de; Ferro,Viviane G.
Abstract: The Ctenuchina moths comprise 874 New World species. Here we provide a list of Ctenuchina species from the Brazilian Amazon. The list was produced from specimens deposited in the most important Brazilian collections and from literature data. Nearly 31% (273) of the New World Ctenuchina species were recorded, including 28 new occurrences for the Brazilian Amazon. Santarém and Belém were the municipalities with the highest number of species records, with 139 and 88, respectively. The high number of Ctenuchina records in the Amazon is underestimated because this subtribe has never been sampled in the vast majority of the biome. This is a worrying scenario because the Amazon has the world highest absolute rate of forest reduction. To suggest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Tiger moths; Inventory; Noctuoidea; Wasp Moths.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200301

Checklist of dragonflies and damselflies (Insecta: Odonata) of the Amazonas state, Brazil
Provedor de dados: 49
Autores: Koroiva,Ricardo; Neiss,Ulisses Gaspar; Fleck,Günther; Hamada,Neusa.
Abstract: Here we provide a checklist of the odonates from Amazonas state, Brazil. We registered 324 species and 101 genera, making Amazonas the Brazilian state with the most Odonata species recorded. The families with the highest number of species were Coenagrionidae with 32 genera and 101 species, followed by Libellulidae with 28 genera and 100 species and Gomphidae with 12 genera and 45 species. Some regions of Amazonas state remain poorly explored, such as the southern area, and large municipalities, such as São Gabriel da Cachoeira. This work underlines the importance of the biological diversity from Amazonas state and the Amazonian Biome for Odonata species richness in Brazil and shows that many areas in the world’s largest tropical forest have not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic insects; List of species; Anisoptera; Zygoptera; Amazon; Neotropical region.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100307

Dung beetles of the tribe Phanaeini (Coleoptera: Scarabaeidade: Scarabaeinae) from Roraima state, Northern Brazil: checklist and key to species
Provedor de dados: 49
Autores: Pacheco,Thaynara L.; Vaz-de-Mello,Fernando Z.
Phanaeini comprises about 160 species in 12 genera restricted to the Americas. Since the diversity of this tribe remains little known in several regions of Brazil, this study presents a guide to its 13 species with presence in the biologically rich and largely unexplored state of Roraima: Coprophanaeus (Coprophanaeus) abas (MacLeay, 1819), C. (C.) dardanus (MacLeay, 1819), C. (C.) gameziArnaud, 2002, C. (C.) jasius (Olivier, 1789), C. (Megaphanaeus) lancifer (Linnaeus, 1767), Oxysternon (Oxysternon) conspicillatum conspicillatum Werber, 1801, O. (O.) durantoniArnaud, 1984, O. (O.) ebeninum (Nevinson, 1890), O. (O.) festivum viridanum (Olsoufieff, 1924), O. (O.) silenus chicheryiArnaud, 2001, Phanaeus (Notiophanaeus) bispinusBates, 1868, P. (N.)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inventory; Amazon; Guyana Shield.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000200110

Anastrepha species (Diptera: Tephritidae), their hosts and parasitoids in southern Amapá State, Brazil
Provedor de dados: 49
Autores: Silva,Ricardo Adaime da; Lima,Adilson Lopes; Xavier,Samara Larissa Oliveira; Silva,Wilson Rodrigues da; Marinho,Cláudia Fidelis; Zucchi,Roberto Antonio.
This work was carried out to record the species of Anastrepha, their host plants and associated parasitoids in Laranjal do Jari and Vitória do Jari, Amapá State. Fleshy fruits of 17 species of 13 families were sampled, from February to July of 2006, in main districts of both municipalities. Nine species of Anastrepha and six species of braconid parasitoids were sampled during this study.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Amazon; Fruit flies; Hymenoptera; Braconidae; Tephritoidea.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300037

Observation of predation of the giant fishing spider Ancylometes rufus (Walckenaer, 1837) (Araneae, Ctenidae) on Dendropsophus melanargyreus Cope, 1877 (Anura, Hylidae)
Provedor de dados: 49
Autores: Moura,Mário Ribeiro; Azevedo,Leonardo Pimenta.
We report here an observation of predation of the giant spider Ancylometes rufus on the tree frog Dendropsophus melanargyreus in a southern region of Amazonia Forest. We also reviewed the available literature on predation of this spider species on vertebrates.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural history; Tree frog; Amazon; Mato Grosso.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000400028

Fishes from the Jaru Biological Reserve, Machado River drainage, Madeira River basin, Rondônia State, northern Brazil
Provedor de dados: 49
Autores: Costa,Igor David; Ohara,Willian Massaharu; Almeida,Missilene.
Abstract: This work assessed freshwater fishes collected at 12 stations located along the Tarumã River, middle Machado River, Madeira River basin. The fieldwork took place in May and September 2015 during the high and low water seasons, respectively. We gathered 1,482 specimens representing seven orders, 30 families, 54 genera and 74 species using seine, gill, and hand nets. The family Characidae was the most representative, exhibiting the highest number of species captured. The species with the greatest abundance were Hemigrammus vorderwinkleri, Hyphessobrycon bentosi, Hemigrammus cf. bellottii, Bryconella pallidifrons, and Apistogramma resticulosa. Two species that remained unidentified are probably a new species. This study represents the third fish...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Freshwater; Conservation; Ichthyofauna; Inventory.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100307

Free meals on long-distance cruisers: the vampire fish rides giant catfishes in the Amazon
Provedor de dados: 49
Autores: Zuanon,Jansen; Sazima,Ivan.
The trichomycterid catfishes known as candirus are renowned for their blood feeding, but information on their habits under natural conditions is very fragmentary and generally restricted to hosts or habitats. We recorded an undescribed species of the vandelliine genus Paracanthopoma riding the giant jau catfish, Zungaro zungaro (Pimelodidae), in the upper Amazon. The candirus were found on the host's caudal and pectoral fins, as well as the base of the dorsal fin, with their snouts buried up to the eyes in the tough skin of the catfish host. All of them had small amounts of partly digested blood in the distal part of the gut. Along the host's dorsal fin base we found a few additional tiny holes, most of them healed. We suggest that Paracanthopoma feeds on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trichomycteridae; Paracanthopoma sp.; Candiru; Blood-feeding; Phoresis; Dispersal; Pimelodidade; Zungaro zungaro; Amazon.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000100012

An opportunity for testing multiple paternity in a wild Jaguar (Panthera onca)
Provedor de dados: 49
Autores: Pinho,Gabriela Medeiros de; Fonseca,Rogerio; Farias,Izeni Pires.
We performed a paternity test for three cubs from one wild female jaguar (Panthera onca). The opportunity for this study was generated by an accident involving a vehicle collision with a pregnant jaguar in the central Amazon. The cubs are polyzygotic triplets and were found to have been sired by the same male. Here, we also provide an overview and discuss several aspects of jaguar reproduction.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Felidae; Paternity test; Multiple paternity; Road kill; Amazon.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300301

Does body size of neotropical ant species influence their recruitment speed?
Provedor de dados: 49
Autores: Godoy,Bruno Spacek; Camargos,Lucas Marques de.
Ants are one of the most important animal groups in tropical forests because of its abundance and number of species. An important characteristic of the group is the eusociality, which allows the occurrence of a recruitment behavior when food resource is found. However, there are two main questions regarding this behavior: (i) the recruitment is a product of environmental or phylogenetic pressures, and (ii) the recruitment speed is related to the body size of the ant species. In this work we addressed these two questions using 17 species of neotropical ants, in the Amazonic lowland dense rain forest. According to results, recruitment behavior is related to ant size, where smaller species exhibit this trait when finding a protein resource. However, species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Formicidae; Foraging behavior; Phylogenetic contrasts; Social insects; Amazon.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100010

Anastrepha species (Diptera: Tephritidae), their hosts and parasitoids in the extreme north of Brazil
Provedor de dados: 49
Autores: Marsaro Júnior,Alberto Luiz; Adaime,Ricardo; Ronchi-Teles,Beatriz; Lima,Camila Ribeiro; Pereira,Paulo Roberto Valle da Silva.
This work was carried out in five municipalities of the State of Roraima, Brazil, aiming to record the occurrence of Anastrepha species, their host plants and parasitoids. Fleshy fruits of 21 species of 10 families were sampled from September/2007 to September/2008. We collected 10 species of Anastrepha (Anastrepha bahiensis Lima and Anastrepha montei Lima were reported for the first time in Roraima) and five species of parasitoids (4 Braconidae and 1 Figitidae). Doryctobracon areolatus (Szépligeti) was the most abundant parasitoid.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fruit flies; Diversity; Amazon; Anastrepha bahiensis; Anastrepha montei.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000400012

Spatio-temporal distribution of fish larvae in relation to ontogeny and water quality in the oligohaline zone of a North Brazilian estuary
Provedor de dados: 49
Autores: Sarpedonti,Valérie; Anunciação,Érica Moema Silva da; Bordalo,Adriana Oliveira.
Larval fish assemblage in Guajará Bay was studied through four quarterly field campaigns and discussed in relation to individuals' development stages and exposure to contaminants poured out by the Pará State Capital City, Belém. Larval densities were low and diversity extremely poor with a strong dominance of clupeids, engraulids and, to a lower extent, sciaenids. The main spawning season was registered at the onset of the rainy period. Pre-flexion and flexion clupeiforms remained in the farmost stations from the city while post-flexion larvae were found near urban activity centres. Unlikely, pre-flexion and flexion sciaenids were scattered along the city waterfront. Post-flexion larvae were rare; it is suggested that sciaenids use the bay as a transitory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyoplankton; Amazon; Urban impact; Belém.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300055

Drosophilidae (Insecta, Diptera) in the state of Pará (Brazil)
Provedor de dados: 49
Autores: Santa-Brígida,Rosângela; Schmitz,Hermes José; Martins,Marlúcia Bonifácio.
Abstract This list contains information on the Drosophilidae that occur in the Brazilian state of Pará, Amazon biome, and an analysis of the current knowledge of Drosophilidae based on museum material and literature records. This list includes a detailed account of the material deposited in the entomological collections of the Museu Paraense Emílio Goeldi and Museu de Zoologia da Universidade de São Paulo, up to 2015. In total, 122 species of Drosophilidae were registered, including 27 new records for the state of Pará and 22 are new records for the Amazon; for instance, the genera Diathoneura and Rhinoleucophenga, and three new records for Brazil, (Drosophila fasciola, Diathoneura flavolineata and Drosophila neochracea). The state of Pará is the third...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Species composition; Amazon; Diathoneura; Rhinoleucophenga.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100204

Length-weight relationship and reproduction of the guppy Poecilia reticulata (Cyprinodontiformes: Poeciliidae) in urban drainage channels in the Brazilian city of Belém
Provedor de dados: 49
Autores: Montag,Luciano Fogaça de Assis; Freitas,Tiago Magalhães da Silva; Raiol,Roberta Dannyele de Oliveira; Silva,Marlene Vasconcelos da.
This paper describes the length-weight relationship, size at first maturation (L), and breeding season of Poecilia reticulata found in drainage channels on the campus of the Federal University of Pará (UFPA) in the Brazilian city of Belém. A total of 1.936 specimens (942 males and 994 females) were collected in monthly samples of the study area between June, 2006, and March, 2007. Females were significantly longer and heavier than males. The length-weight relationship for males was established by the equation Pt = 5 × 10-5 × Ct2.397 and for females by Pt = 3 × 10-6 × Ct3.419. The estimated value of L was 17.5 mm for males and 20.4 mm for females, suggesting that males initiate reproductive activity at a smaller size than females. The abundance of mature...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish ecology; Urban environments; Breeding; Amazon; Poecilia reticulata.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300007

Ichthyofauna of the upper Juruena river on Chapada dos Parecis, Mato Grosso, Brazil
Provedor de dados: 49
Autores: 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

Report of Macraspis pseudochrysis Landin, 1956 (Coleoptera: Scarabaeidae: Rutelinae) on açai palms (Euterpe oleracea Mart.) in floodplains in the state of Amapá, Brazil
Provedor de dados: 49
Autores: Jesus-Barros,Cristiane Ramos de; Freitas,Lidiane Silva; Grossi,Paschoal Coelho.
The açaí palm (Euterpe oleracea) is an East Amazon palm found most frequently in the Amazon River estuary. Riverside dwellers in different regions of the state of Amapá have recently been observing a species of coleopteran attacking the inflorescences of açai palms. With a view to identifying a species of coleopteran attacking inflorescences of E. oleracea in the Brazilian state of Amapá, insects were collected in the regions of Abacate da Pedreira (two individuals) and Ariri (six) in the city of Macapá. Five individuals were also collected in Mazagão. The insects were collected from açai palm inflorescences using entomological nets, then preserved and submitted for identification. They were identified as Macraspis pseudochrysis Landin, 1956 (Coleoptera:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Açai palm; Arecaceae; Macraspis; Amapá; Amazon.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100042

Jururumberus, a new genus of Orthocladiinae (Diptera: Chironomidae) from Brazil
Provedor de dados: 49
Autores: Mendes,Humberto Fonseca; Andersen,Trond.
Jururumberus n. gen. is erected based on the males of J. arapuca n. sp. from São Paulo State, in southeastern Brazil and J. uatuma n. sp. from the Amazonas in northern Brazil. The genus can be separated from other Orthocladiinae based on the combination of bare eyes, wing, and squama; frons U-shaped, extended ventrally; AR ≤ 0.3, antenna without apical seta; palp short, five-segmented, with sensilla clavata in subapical sensillum coeloconicum; no acrostichals; costa strongly extended; R4+5 ending proximal to M3+4; anal point narrowly triangular with microtrichia only, sitting high on tergite IX; and virga composed of two spines.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chironomidae; Orthocladiinae; Jururumberus; New genus; New species; Brazil; Neotropical region; Mata Atlântica; Amazon.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400071

Fish diet from Manacapuru Big Lake complex (Amazon): a approach starting from the traditional knowledge
Provedor de dados: 49
Autores: Rebelo,Sérgio Roberto Moraes; Freitas,Carlos Edwar de Carvalho; Soares,Maria Gercilia Mota.
In the Amazon fishing is one of the main economic activities and higher value to traditional riverine communities of the region. Considering this importance is to suppose that the riverine populations have knowledge about fish fauna explores for them, because their forming culture that maintain a strait relationship with natural resources. This study aim to elevate the traditional knowledge of the fishermen from the riverine communities in the Big Lake Complex about the fish alimentary diet caught for commercialization and consumption. This study was realized in the Manacapuru Big Lake Complex through interview jointed with 62 fishermen. The results presents a detailed knowledge about the tambaqui, tucunaré, pacu, acará-açú, curimatã, aruanã, matrinxã,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethno-ichthyology; Fish ecology; Fishermen; Amazon; Flood lakes.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300003

A model for the importance of large arborescent palms in the dynamics of seasonally-dry amazonian forests
Provedor de dados: 49
Autores: Salm,Rodolfo; Jalles-Filho,Euphly; Schuck-Paim,Cynthia.
In this study we propose a model that represents the importance of large arborescent palms in the dynamics of seasonally-dry Amazonian forests. Specifically, the model is aimed at guiding the investigation of the role of large arborescent palms on forest regeneration and succession. Following disturbance, the high level of luminosity reaching recently formed forest gaps favors the quick proliferation of shade-intolerant lianas that, by casting shade on the crowns of mature forest trees and increasing tree-fall probability, suppress forest succession. Due to their columnar architecture palm trees are, however, not severely affected by vines. As the palms grow, the canopy at the gaps becomes gradually higher and denser, progressively obstructing the passage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Attalea maripa; Forest dynamics; Palm trees; Regeneration.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300011

A new species of Telmatoscopus Eaton (Diptera, Psychodidae) from Brazil
Provedor de dados: 49
Autores: Bravo,Freddy; Souza,Isys.
A new Brazilian species of Telmatoscopus Eaton (Diptera, Psychodidae) is described and illustrated. A key to males of Neotropical species of Telmatoscopus is provided.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diptera; Psychodidae; Amazon; New species; Brazil.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000100008

Activity of soil microbial biomass altered by land use in the southwestern Amazon
Provedor de dados: 53
Autores: Mazzetto,André Mancebo; Cerri,Carlos Eduardo Pellegrino; Feigl,Brigitte Josefine; Cerri,Carlos Clemente.
ABSTRACT The increasing demand for food creates environmental problems, mainly due to the removal of native vegetation cover for agriculture expansion in Brazil. These changes in land use lead to changes in the soil organic matter dynamics. Microorganisms represent the most biological and physiological diversity in soil, as well as are responsible for more than 95% of the decomposition and nutrient cycling processes. The objective in this research was to check if there is difference of patterns in activity of soil microbial biomass under varied natural vegetation, pastures in use and agricultural systems recently established. The area covered by this study corresponds to the states of Rondônia and Mato Grosso. Canonical variate analysis was used in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Basal respiration; Amazon.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000100079

First Report of Albinism in the Threatened Gillbacker Sea Catfish Sciades parkeri (Siluriformes, Ariidae)
Provedor de dados: 52
Autores: Andrade,Marcelo C.; Schmid,Kurt; Souza Junior,Oswaldo; Giarrizzo,Tommaso.
ABSTRACT A sexually mature albino specimen of the Gillbacker Sea Catfish species Sciades parkeri (Siluriformes, Ariidae), a vulnerable species, was captured in northern Amazon estuary, State of Pará, Brazil. Herein we present the first record of albinism phenomenon for this species, including the morphometric description of the albino, and a non-abnormal coloring specimen.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Delta; Estuary; Marajó; Vulnerable.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100416

Seasonal variations in blood parameters of the Amazonian manatee, Trichechus inunguis
Provedor de dados: 52
Autores: Colares,Elton P.; Colares,Ioni G.; Bianchini,Adalto; Santos,Euclydes A.
Seasonal variations in body weight, food consumption and blood glucose, total lipids, urea, total proteins, albumin and globulins of captive Amazonian manatees, Trichechus inunguis, were determined. Body weight changed significantly along the year, increasing from autumn to spring and decreasing in summer. The mean daily food intake of paragrass remained almost unchanged along the year. Paragrass administered to the manatees showed important variations in crude protein and lipid content along the year. No significant differences in blood parameters were registered between males and females in all seasons. Further, there were no significant differences in blood total proteins, albumin and globulins along the year. On the other hand, significant differences...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonian manatee; Trichechus; Blood biochemistry; Nutrition; Amazon.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200005

Macroinvertebrates inhabiting the tank leaf terrestrial and epiphyte bromeliads at Reserva Adolpho Ducke, Manaus, Amazonas
Provedor de dados: 52
Autores: Torreias,Sharlene Roberta da Silva; Ferreira-Keppler,Ruth Leila.
The aim of this work was to investigate the diversity of macroinvertebrates and also verify if the abundance and diversity of Diptera were influenced by the abiotic factors. The samples were collected from the epiphytic and terrestrial bromeliads G. brasiliensis (1 and 3m) in wet and dry seasons at Reserva Adolpho Ducke analyzed total of 144 samples were analyzed from a total of 15,238 individuals collected. These conatined 14,097 insects and, among these, 8,258 were immature Diptera, represented by eight most abundant families: Chironomidae, Ceratopogonidae and Culicidae. The relationship of Diptera diversity was influenced by the seasons and stratifications (p= 0.01); the abundance was influenced by the volume of water (p= 0.02) and the relationship...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bromeliaceae; Guzmania; Macroinvertebrates; Phytotelm.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600015

An Innovative Vessel for Research Studies at Amazon as a Potential Support for Sustainable Development and Conservation of the Region
Provedor de dados: 52
Autores: Meliande,Luís Otávio Vieira; Soares Filho,Afrânio de Amorim Francisco; Fonseca,Marcus Vinícius de Araújo; Miranda,Fernando Pellon de.
This study proposes an innovative and demonstrably necessary vessel intended for the research and logistic support of scientific or non-scientific activities in the Amazon, designed in accordance with the environmental and geographical requirements and characteristics of the region (possibly applicable to other similar hydrographic basins). The study also demonstrates the existence of a demand (actual and potential) for the infrastructure proposed. This infrastructure could subsidize the efforts devoted to the expansion of knowledge about the region, since many areas of science, institutions and business segments could benefit from its implementation. The access to knowledge could attract private investments with the perspective of developing business...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Research vessel; Research boat; Amazon; Sustainable development; Conservation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000600979

Food Plants Eaten by Amazonian Manatees (Trichechus inunguis, Mammalia : Sirenia)
Provedor de dados: 52
Autores: Colares,Ioni G.; Colares,Elton P.
To determine the feeding habits of the Amazonian manatee Trichechus inunguis in some Central Amazonian rivers and lakes, we compared plant epidermis found in the stomach contents and/or faeces of animals with a reference collection of plants present in the studied areas. Twenty five samples from digestive tracts of animals found dead and 25 faeces samples found floating were analyzed. From these samples, 24 aquatic macrophytes were identified. The Gramineae family was identified in 96% of the samples, Paspalum repens and Echinochloa polystachya being the most abundant in the samples. The second most frequent family was the Pontederiaceae primarily Eichhornia crassipes. During the high water period, the animals showed a more selective diet (eight identified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonian manatee; Trichechus; Food; Plants eaten; Amazon.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100011

An in vivo test to assess mefloquine 25 mg/kg for the treatment of uncomplicated falciparum malaria in Rondônia, Brazil
Provedor de dados: 55
Autores: Basano,S.A.; Bianco,A.; Taylor,W.R..J; Olliaro,P.; Camargo,L.M.A.
Drug-resistant Plasmodium falciparum is undermining malaria control efforts worldwide. In Brazil, mefloquine (MQ) at a dose of 15 mg/kg body weight is used to treat P. falciparum. At this dose, MQ resistance developed rapidly in Thailand. Use of a higher MQ dose may retard the development of resistance. We treated 50 patients aged one to 67 years who had acute, uncomplicated P falciparum malaria using MQ 25 mg/kg. There were no serious adverse events. Two patients complained of dizziness and insomnia. Assessing evaluable patients, the day 42 cure rate was 40/42 [95.2% (95% confidence interval 83.8 to 99.4%)]. Mefloquine was efficacious and well tolerated in this small cohort from the state of Rôndonia.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malaria; Mefloquine; Amazon; Rondônia; Therapeutics.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702006000400013

Comparative study of human exposure to mercury in riverside communities in the Amazon region
Provedor de dados: 56
Autores: Pinheiro,M.C.N.; Oikawa,T.; Vieira,J.L.F.; Gomes,M.S.V.; Guimarães,G.A.; Crespo-López,M.E.; Müller,R.C.S.; Amoras,W.W.; Ribeiro,D.R.G.; Rodrigues,A.R.; Côrtes,M.I.T.
Four populations in the Amazon area were selected for a comparative study of mercury-exposed and non-exposed populations: São Luiz do Tapajós, Barreiras, Panacauera, and Pindobal Grande. The highest mercury levels in human hair samples were found in São Luiz do Tapajós and Barreiras, greatly exceeding the limits established by the World Health Organization. Panacauera showed an intermediate level below 9 µg/g. This was the first comparative and simultaneous evaluation of mercury exposure in the Amazon area. Also, thanks to this type of monitoring, we were able to eliminate the uncertainties about the reference dose. On the basis of these data, we can conclude that the mercury levels detected in exposed populations of the Tapajós River basin may be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mercury; Amazon; Comparative study; Riverside populations; Human exposure; Reference dose.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000300012

Karyological, biochemical, and physiological aspects of Callophysus macropterus (Siluriformes, Pimelodidae) from the Solimões and Negro Rivers (Central Amazon)
Provedor de dados: 56
Autores: Ramirez-Gil,H.; Feldberg,E.; Almeida-Val,V.M.F.; Val,A.L.
Karyological characteristics, i.e., diploid number, chromosome morphology and nucleolus organizer regions (NORs), biochemical characteristics, i.e., electrophoretic analysis of blood hemoglobin and the tissue enzymes lactate dehydrogenase (LDH), malate dehydrogenase (MDH), alcohol dehydrogenase (ADH), and phosphoglucose isomerase (PGI), and physiological characteristics, i.e., relative concentration of hemoglobin and intraerythrocytic concentrations of organic phosphates were analyzed for the species Callophysus macropterus collected from Marchantaria Island (white water system - Solimões River) and Anavilhanas Archipelago (black water system - Negro River). Karyological and biochemical data did not reveal significant differences between specimens...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Callophysus; Fish; Amazon; Population genetics; Adaptation.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001100014

Low pH and calcium effects on net Na+ and K+ fluxes in two catfish species from the Amazon River (Corydoras: Callichthyidae)
Provedor de dados: 56
Autores: Matsuo,A.Y.; Val,A.L.
The present study analyzes Na+ and K+ disturbances caused by low pH in two catfish species from the Amazon River. Corydoras adolfoi inhabits ion-poor, black-stained, low pH (3.5-4.0) waters, while C. schwartzi is native to ion-rich waters at circumneutral pH. Fish were exposed to pH 3.5 Ca2+-free, and Ca2+-enriched (~500 µmol/l) water to determine the protective effects of calcium. Net Na+ and K+ fluxes were measured in the water collected from the fish experimental chambers. C. adolfoi was unable to control the Na+ efflux at low pH, exhibiting Na+ loss up to -594 ± 84 nmol g-1 h-1 during the first hour. After 3 and 6 h, net Na+ flux increased by 7- and 23-fold, respectively. In C. schwartzi, at pH 3.5, the initial high Na+ loss (-1,063 ± 73 nmol g-1 h-1)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Low pH; Calcium; Blackwater; Net Na+ and K+ flux; Amazon; Catfish.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000300012

Anti-Leptospira spp and anti-Brucella spp antibodies in humans from rural area of Monte Negro municipality, state of Rondônia, Brazilian Western Amazon
Provedor de dados: 58
Autores: Aguiar,Daniel M.; Cavalcante,Guacyara T.; Camargo,Luis M. A.; Labruna,Marcelo B.; Vasconcellos,Silvio A.; Souza,Gisele O.; Gennari,Solange M.
Sera from 276 humans living in 71 farms located in Monte Negro Municipality, RO., Western Amazon, Brazil were examined for anti-Leptospira spp antibodies by Microscopic Agglutination Test and for anti-Brucella spp antibodies by Tube Agglutination Test. Leptospira spp antibodies were detected in 28 (10.2%) of them with at least one positive case in 23 farms (32.4%). The most frequent leptospira serovars were Patoc (46.7%), Autumnalis (10.0%) and Shermani (10.0%). The proportion of positive males (14.5%) were higher than females (5.0%; P &lt;0.05) and the contact with river water presented association with Leptospira spp infection (OR: 27; P=0.01). A total of 04 (1.4%) humans reacted against Brucella antigens; three farms (4.2%) presented at least one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Human; Leptospirosis; Brucellosis; Amazon; Brazil.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100019

The potential of compounds isolated from Xylaria spp. as antifungal agents against anthracnose
Provedor de dados: 58
Autores: Elias,Luciana M.; Fortkamp,Diana; Sartori,Sérgio B.; Ferreira,Marília C.; Gomes,Luiz H.; Azevedo,João L.; Montoya,Quimi V.; Rodrigues,André; Ferreira,Antonio G.; Lira,Simone P.
ABSTRACT Anthracnose is a crop disease usually caused by fungi in the genus Colletotrichum or Gloeosporium. These are considered one of the main pathogens, causing significant economic losses, such as in peppers and guarana. The current forms of control include the use of resistant cultivars, sanitary pruning and fungicides. However, even with the use of some methods of controlling these cultures, the crops are not free of anthracnose. Additionally, excessive application of fungicides increases the resistance of pathogens to agrochemicals and cause harm to human health and the environment. In order to find natural antifungal agents against guarana anthracnose, endophytic fungi were isolated from Amazon guarana. The compounds piliformic acid and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2-Hexylidene-3-methylbutanedioic acid; Amazon; Anthracnose; Plant pathogen.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400840

Vibrio cholerae O1 from superficial water of the Tucunduba Stream, Brazilian Amazon
Provedor de dados: 58
Autores: Sá,L.L.C.; Vale,E.R.V.; Garza,D.R.; Vicente,A.C.P.
Isolation and genetic characterization of an environmental Vibrio cholerae O1 from the Amazon is reported. This strain lacks two major virulence factors - CTX and TCP - but carries other genes related to virulence. Genetic similarity with epidemic strains is evaluated and the importance of V. cholerae surveillance in the Amazon is emphasized.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vibrio cholerae O1; Environment; Amazon; Virulence genes; PFGE.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200027

Negative results for anti-Leptospira sp. agglutinins in free-living Iguanas (Iguana iguana) from the Amazon region of Brazil
Provedor de dados: 65
Autores: Monteiro,Thamillys Rayssa Marques; Rocha,Katarine de Souza; Mesquita,Gleiciane Schupp de Sena; Castro,Danniel Carvalho de; Miranda,Stefânia Araújo; Paz,Giselle Souza da; Langoni,Hélio; Moraes,Carla Cristina Guimarães de.
ABSTRACT:  Although, serological studies for leptospirosis in iguanas have already been performed, there is no report in the Amazon region. Therefore, the present study aimed to investigate the presence of anti-Leptospira sp. in free living Iguanas-verdes (Iguana iguana) of Mangal das Garças Park, metropolitan region of Belém, Pará, Northern region of Brazil. Twenty-nine blood samples of Iguana-verde (I. iguana) were collected from Mangal das Garças Park. For the serological diagnosis of Leptospira sp. it was employed microscopic agglutination test (MAT) with 25 live antigens of Leptospira sp. as antigens. It was observed that all samples were non-reactive, suggesting no exposure to the agent.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reptiles; Leptospirosis; Wild animals; Amazon.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900452

Growth ring analysis of Euxylophora paraensis through x-ray microdensitometry
Provedor de dados: 65
Autores: Andrade,Eva Santos de; Garcia,Silvana dos Santos Carvalho; Albernaz,Ana Luisa Kerti Mangabeira; Tomazello Fillho,Mario; Moutinho,Victor Hugo Pereira.
ABSTRACT: Euxylophora paraensis Huber - Rutaceae, popularly known as yellow heart, is a species with a low-density population that has suffered intense exploitation in recent decades. This has led to its inclusion in the IBAMA list of endangered species. This study aimed to evaluate the existence of growth rings and their annuity in five trees of Euxylophora paraensis through the x-ray microdensitometry technique, as well as to compare them using the classical method. Application feasibility of this technique can be deepened through future, broader dendroecological studies, which may better elucidate the understanding of the species population dynamics and promote more sustainable uses. Wood disks were collected from the base of five 29-year-old trees from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dendrochronology; Yellow heart; Density; Amazon.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400501

Tick fauna of wild animals received and attended at the Santarém Zoological Park, western Pará State, Brazil
Provedor de dados: 65
Autores: Nascimento,Kelly Karoline Gomes do; Veríssimo,Samara Maria Modesto; Raia,Vanessa de Almeida; Guimarães,Ruth Cavalcante Silva; Seade,Gisele Cristine Castro; Azevedo,Adna Cristina Picanço; Matos,Sidcley Pereira; Oliveira,Jairo Moura de; Bezerra,Isis Abel; Martins,Thiago Fernandes.
ABSTRACT: Ticks are known worldwide for parasitizing a number of wild hosts. However, few studies have been conducted on ticks in zoos in Brazil. The objective of the present study was to collect, identify, and report the parasitic tick fauna found on wild Amazon animals received and attended at the Santarém Zoological Park from September 2004 to September 2013. In all, 56 animals, including 26 mammals and 30 reptiles, were sampled, from which 1172 ticks were collected and identified, comprising 862 adults, 284 nymphs, and 26 larvae. Nymphs of Amblyomma geayi on three-toed sloth (Bradypus tridactylus), adults of Amblyomma longirostre on black dwarf porcupine (Coendou nycthemera), and nymphs of Amblyomma naponense on southern tamandua (Tamandua...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Amblyomma; Wildlife conservation; Brazil.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000502

Physicochemical characteristics of pollen collected by Amazonian stingless bees
Provedor de dados: 65
Autores: Rebelo,Kemilla Sarmento; Ferreira,Antônio Gilberto; Carvalho-Zilse,Gislene Almeida.
ABSTRACT: The purpose of this study was to determine the physicochemical characteristics of pollen collected by the Amazonian stingless bees Melipona seminigra and Melipona interrupta , in order to verify whether their characteristics meet the physicochemical requirements established by the Brazilian Technical Regulation for Identity and Quality of Bee Pollen. Physicochemical analyses were performed through official analytical methods. Results of pollen analyses collected by  M. seminigra and M. interrupta were respectively as follows: moisture: 53.39 and 37.12%; protein: 37.63 and 24.00%; lipids: 10.81 and 6.47%; ash: 4.03 and 2.74%; crude fiber: 9.30 and 13.65%; carbohydrates: 25.66 and 44.27%; energy: 350.47 and 331.33kcal%; pH: 3.70 and 3.34; total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Meliponinae; Percent composition; Bee bread.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500927