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| Registros recuperados: 2.154 | |
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| Cordeiro,I. Maria Castro-Coimbra; Oliveira Junior,Moises Cordeiro Mourão-de; Gazel-Filho,Aderaldo Batista; Barros,P. Luiz Contente-de; Lameira,Osmar Alves; Oliveira,Francisco de Assis. |
| Resumen El incremento en la perturbación ambiental y la presión mundial para preservar la selva amazónica han fomentado el cultivo de especies nativas. Con el objetivo de evaluar el crecimiento de Schizolobium parahyba var. amazonicum (Huber ex Ducke) barneby cultivado en presencia de componentes agrícolas como Ananas comosus var. erectifolius, se desarrolló un estudio en la Estación Experimental de la empresa Tramontina Belem S.A., ubicada en la Ciudad de Aurora do Pará (PA), Brasil. El diseño experimental fue factorial de bloques completos al azar con parcelas subdivididas en el tiempo, para que los arreglos formaron los tratamientos de la parcela y las subparcelas fueron el tiempo de observación, con seis tratamientos y cuatro repeticiones: 1) S.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Agroforestería; Monocultivos y áreas degradadas. |
| Ano: 2016 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952016000100079 |
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| FERREIRA,FRANCISCO A.S.; ARCOS,ADRIANO N.; MAIA,NATALIELLI S.G.; SAMPAIO,RAQUEL T.M.; COSTA,FÁBIO M.; RODRIGUES,ILÉA B.; TADEI,WANDERLI P.. |
| Abstract This study aimed to analyze the possible effects of diflubenzuron on the associated insect fauna under laboratory, semi-field and field conditions. Laboratory bioassays were performed in aquariums with mortality readings (%) every 24h until 96h, and in semi-fields, insects were kept in basins with readings every 24h for up to 12 days, in triplicates and a control. In the field experiment, a collection was performed before the application of diflubenzuron in ten brick factory pits (25m²) and 15 post-application. The values of LC50 and LC90 for Chironomus were 2.77x10-3g/L and 0.86g/L, respectively, and for Buenoa, they were 0.019g/L and 0.92g/L, a strong relationship was observed between mortality and exposure time (r²>0.8) in all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Chironomus sp. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100722 |
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| Toledo,Mauro B. de; Bush,Mark B.. |
| Pollen, charcoal, and C14 analyses were performed on a sediment core obtained from Lake Tapera (Amapá) to provide the palaeoenvironmental history of this part of Amazonia. A multivariate analysis technique, Detrended Correspondence Analysis, was applied to the pollen data to improve visualization of sample distribution and similarity. A sedimentary hiatus lasting 5,500 years was identified in the Lake Tapera. Because the timing of the hiatus overlapped with the highest Holocene sea-level, which would have increased the local water table preventing the lake from drying out, it is clear that sea-level was not important in maintaining the lake level. Lake Tapera probably depended on riverine flood waters, and the sedimentary gap was caused by reduced Amazon... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vegetation change; Hydrology change; Amazonia; Pollen record; Climate change. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000100014 |
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| DOURADO,EDUARDA D.R.; FERREIRA-KEPPLER,RUTH L.; MARTINS,RENATO T.; RONDEROS,MARIA M.. |
| ABSTRACT We assessed the immature stages of Ceratopogonidae (Diptera) in artificial containers in an urban forest fragment in Manaus (Brazil), including their behavioral, biological and ecological information. In addition, we evaluated the effects of deforestation in an open and forested area on Ceratopogonidae communities. Immatures were sampled between August 2012 and July 2014 in artificial containers installed in both habitat types. We collected 685 immatures of seven morpho-species of Bezzia Kieffer, Culicoides Latreille, Dasyhelea Kieffer, Forcipomyia Meigen, and Palpomyia Meigen. In the open area, we recorded higher temperature and electrical conductivity values than in the forested area; however, these variables did not differ between seasons.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Aquatic insects; Artificial containers; Deforestation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602757 |
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| HOPKINS,MICHAEL J.G.. |
| Abstract: Amazonia is often cited as having the most diverse flora on the planet. However, the total number of species of higher plants in the region has been largely a matter of guesswork. Some recent publications have estimated the total number of species present, which indicate a lower overall diversity than was estimated in the past. However, analysis of the sampling density across the region, and data from various sources suggest that there may be reason why the recent figures may be considerable underestimates. I believe that much more investment in extensive collecting of quality plant specimens is needed to encounter the very large number of rare and local species that might never have been collected. Unfortunately the tendencies of investment in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Amazonia; Species discovery; Plants. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000600616 |
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| Minuzzi,Orlando R.R.; Bastos Neto,Artur C.; Formoso,Milton L.L.; Andrade,Sandra; Janasi,Valcir A.; Flores,Juan A.. |
| This work aims at the geochemical study of Pitinga cryolite mineralization through REE and Y analyses in disseminated and massive cryolite ore deposits, as well as in fluorite occurrences. REE signatures in fluorite and cryolite are similar to those in the Madeira albite granite. The highest ΣREE values are found in magmatic cryolite (677 to 1345 ppm); ΣREE is lower in massive cryolite. Average values for the different cryolite types are 10.3 ppm, 6.66 ppm and 8.38 ppm (for nucleated, caramel and white types, respectively). Disseminated fluorite displays higher ΣREE values (1708 and 1526ppm) than fluorite in late veins(34.81ppm). Yttrium concentration is higher in disseminated fluorite and in magmatic cryolite. The evolution of several parameters... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryolite; REE; Y; Pitinga; Amazonia. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400012 |
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| RIBAS,CAMILA C.; ALEIXO,ALEXANDRE. |
| Abstract: Amazonia has been a focus of interest since the early days of biogeography as an intrinsically complex and extremely diverse region. This region comprises an intricate mosaic that includes diverse types of forest formations, flooded environments and open vegetation. Increased knowledge about the distribution of species in Amazonia has led to the recognition of complex biogeographic patterns. The confrontation of these biogeographic patterns with information on the geological and climatic history of the region has generated several hypotheses dedicated to explain the origin of the biological diversity. Genomic information, coupled with knowledge of Earth’s history, especially the evolution of the Amazonian landscape, presents fascinating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Biogeography; Birds; Conservation; Diversification; Rivers. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000600611 |
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| Tavares-Dias,M.; Neves,L.R.; Santos,E.F.; Dias,M.K.R.; Marinho,R.G. B.; Ono,E.A.. |
| The infestation rate in Colossoma macropomum, hybrid tambacu (C. macropomum x Piaractus mesopotamicus) and hybrid tambatinga (C. macropomum x Piaractus brachypomum) with Perulernaea gamitanae Thatcher and Paredes, 1985 from two fish farms in Amapá State, Brazil was studied. Lernaeid parasites (n=2887) were collected mainly on the tongue and the mouth cavity and also on cartilage of gill arches and filaments. Inflammation and fibrous nodules were observed on the attachment sites of the parasites. The infestation rate varied according to the fish farm and host. The prevalence of P. gamitanae was of 100% in hosts from one fish farm and was lower in the other fish farm. Higher intensity of P. gamitanae occurred in hybrids tambacu and tambatinga, but despite... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freshwater fish; Amazonia; Crustacean; Infestation; Parasite. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000400026 |
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| Marinho,R.G.B.; Tavares-Dias,M.; Dias-Grigório,M.K.R.; Neves,L.R.; Yoshioka,E.T.O.; Boijink,C.L.; Takemoto,R.M.. |
| The parasitofauna in the giant Amazon basin, pirarucu (Arapaima gigas Schinz, 1822) cultured in fish farms from the state of Amapá, in eastern Amazonia (Brazil) was investigated. Of the 100 examined fish, 90.0% were parasitized by Ichthyophthirius multifiliis (Ciliophora), Dawestrema cycloancistrium, Dawestrema cycloancistrioides (Monogenoidea) and Polyacanthorhynchus macrorhynchus (Acanthocephala), which had an aggregated distribution pattern. The highest infection rates were caused by I. multifiliis and the lowest by P. macrorhynchus. Infection rates were different for each fish farm, due to different water quality and management characteristics. A negative correlation was found between the intensity of monogenoideans D. cycloancistrium and D.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Fish farm; Freshwater fish; Parasites; Sanity. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000400035 |
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| Cisneros-Heredia,Diego F.. |
| Ten species of Testudines, from four different families: Chelidae, Kinosternidae, Podocnemididae, and Testudinidae, are reported from the Tiputini Biodiversity Station (Universidad San Francisco de Quito), northeastern Amazonian Ecuador; including the second report from Ecuador of Batrachemys heliostemma. These ten species are sympatric but not completely syntopic, thus I comment on their diversity and habitat preferences patterns. The general distribution of some turtles from Amazonian Ecuador is discussed, providing additional records and distribution maps for Chelus fimbriatus, Platemys platycephala, Batrachemys heliostemma, Batrachemys raniceps, Mesoclemmys gibba, Phrynops geoffroanus, Kinosternon scorpioides, and Geochelone denticulata. The presence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reptilia; Testudines; Chelidae; Kinosternidae; Podocnemididae; Testudinidae; Chelus fimbriatus; Platemys platycephala; Batrachemys heliostemma; Batrachemys raniceps; Mesoclemmys gibba; Phrynops geoffroanus; Kinosternon scorpioides; Geochelone denticulata; Podocnemis expansa; Podocnemis unifilis; Peltocephalus dumerilianus; Diversity; Habitat preferences; Distribution; Checklist; Amazonia; Ecuador. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000100011 |
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| Hrycyna,Gabriela; Martins,Ana Carolina Moreira; Graciolli,Gustavo. |
| Abstract: Diptera belonging to the families Nycteribiidae and Streblidae are hematophagous ectoparasites, exclusively of bats. The Amapá State is located in the North Region of Brazil. The Amapá represents one of with the lowest rates of deforestation in the country, with approximately 80% of the territory preserved. Within the State, there are conservation units, Floresta Nacional do Amapá (FNA), Parque Nacional Montanhas do Tumucumaque (PNMT) and Reserva de desenvolvimento Sustentável do Rio Iratapurú (RDSI). These areas represent priority areas for the Conservation of Amazonian Biodiversity. Recently in Amapá studied on the diversity and distribution of bats, however, there are no records of associated arthropod ectoparasites. Therefore, the objective... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hippoboscoidea; Host-parasite relationship; Amazonia; Geographic distribution. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400201 |
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| Calaça,Analice; Faria,Michel Barros; Silva,Diego Afonso; Fialho,Áquila Oliveira; Melo,Fabiano Rodrigues de. |
| Abstract: The Amazonian rainforest harbors one of the most diverse mammal faunas found anywhere in the world, although this fauna is still poorly known. Inventories are essential for the understanding of the biology and ecology of species, and provide basic data for conservation. Over 15 years of sampling in the Saracá-Taquera National Forest, we recorded 72 species of small (nonvolant), medium, and large mammals belonging to 30 families in 10 orders. These taxa included 29 species endemic to the Amazon biome, and 14 classified as threatened with extinction. Overall, the mammalian species richness recorded in the present study was equal to or greater than that recorded in other Amazonian studies, reflecting high levels of diversity on a biogeographic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trombetas; Oriximiná; Amazonia; Species richness; Environmental monitoring; Species list. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400305 |
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| Catenazzi,Alessandro; Lehr,Edgar; May,Rudolf von. |
| We compile a list of all amphibians and reptiles known to occur within Manu National Park, Peru and its buffer zone, located in one of the world's biodiversity hotspots. Covering approximately 0.01% of the planet's terrestrial surface, this protected area preserves 155 species of amphibians and 132 species of reptiles, corresponding to 2.2% and 1.5% respectively of the known diversity for these groups. Moreover, Manu National Park preserves natural habitats and populations of one critically endangered (Atelopus erythropus), three endangered (Bryophryne cophites, Pristimantis cosnipatae and Psychrophrynella usurpator), three vulnerable amphibians (Atelopus tricolor, Gastrotheca excubitor, Rhinella manu) and two vulnerable reptiles (Chelonoidis denticulata,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herpetofauna; Biodiversity hotspots; Cusco Region; Madre de Dios Region; Amazonia. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400269 |
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| Registros recuperados: 2.154 | |
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