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| Registros recuperados: 239 | |
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| 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 |
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| 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 |
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| 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 & Ratanaworabhan (Diptera, Ceratopogonidae). The pupa of Neobezzia fittkaui Wirth & 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 & 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 |
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| Fillion, Myriam; Centro de Desenvolvimento Sustentável, Universidade de Brasília; Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l’environnement (CINBIOSE), Université du Québec à Montréal; Department of Biology, University of Ottawa; fillion.myriam@uqam.ca; Saint-Charles, Johanne; Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l’environnement (CINBIOSE), Université du Québec à Montréal; Faculté de communication, Université du Québec à Montréal; saint-charles.johanne@uqam.ca; Mongeau, Pierre; Faculté de communication, Université du Québec à Montréal; mongeau.pierre@uqam.ca; Mergler, Donna; Centre de recherche interdisciplinaire sur le bien-être, la santé, la société et l’environnement (CINBIOSE), Université du Québec à Montréal; 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 |
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| COSTA,Igor David da; SOARES,Maiza Oliveira. |
| Trophic relationships in fish communities are affected by the availability of resources, which in turn is affected by spatial and temporal variations throughout the year. The aims of this study were to characterize the diet of A. tetramerus in a streamlet in the north of Brazil and compare its composition in different hydrological seasons (wet and dry seasons). Collections were performed every two months from October 2011 to September 2012 with the aid of seine nets, hand net and fishing traps in the streamlet located in the Machado River drainage basin in the Rondônia state. Most of the specimens collected were quite small (< 40 mm) and had empty stomachs. Our results showed that A. tetramerus feeds on a wide variety of items of plant origin, such as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Perciformes; Amazon; Feeding habits; Ornamental fish. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400365 |
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| 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 |
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| 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 |
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| 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 > 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 239 | |
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