Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 115
Primeira ... 123456 ... Última
Imagem não selecionada

Imprime registro no formato completo
A land cover map of South America. Repositório Alice
EVA, H. D.; BELWARD, A. D.; MIRANDA, E. E. de; DI BELLA, C. M.; GONDS, V.; HUBER, O.; JONES, S.; SGRENZAROLI, M.; FRITZ, S..
A digital land cover map of South America has been produced using remotely sensed satellite data acquired between 1995 and the year 2000. The mapping scale is defined by the 1 km spatial resolution of the map grid-cell. In order to realize the product, different sources of satellite data were used, each source providing either a particular parameter of land cover characteristic required by the legend, or mapping a particular land cover class. The map legend is designed both to fit requirements for regional climate modelling and for studies on land cover change. The legend is also compatible with a wider, global, land cover mapping exercise, which seeks to characterize the world?s land surface for the year 2000. As a first step, the humid forest domain has...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Amazonia; Ecosystems; Land cover; Mapping; South America; Vegetation classes.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/17218
Imagem não selecionada

Imprime registro no formato completo
A new genus of Oniscidea from South America and a phylogenetic analysis of related genera (Crustacea: Isopoda: Philosciidae) Naturalis
Leistikow, Andreas.
In a collection of terrestrial isopods from Venezuela, a distinct species was identified which does not fit any of the known genera. Therefore, a new taxon Metaprosekia gen.n. is instituted to accomodate the new species. An analysis of its morphological characters revealed a close relationship to the genus Prosekia Vandel, 1968 and allied genera. The phylogeny of this group is discussed and one of its poorly known representatives, Xiphoniscus mirabilis Vandel, 1968 is redescribed on the basis of the type material.
Tipo: Article / Letter to the editor Palavras-chave: Oniscidea; Philosciidae; South America; Phylogeny; Phylogenetic sytematics.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/534411
Imagem não selecionada

Imprime registro no formato completo
A new Neotropical species of Megamelus and the reassignment of Stenocranus maculipes (Hemiptera: Delphacidae) Rev. Soc. Entomol. Argent.
Mariani,Roxana; Sosa,Alejandro J.; de Remes Lenicov,Ana M. M..
We report on two species of Delphacidae from Argentine wetlands, Megamelus nigrifasciatus Mariani & Remes Lenicov sp. nov. and Megamelus maculipes (Berg) comb. nov. The first species was collected from Eryngium sp. (Apiales: Apiaceae) and was described from the brachypters of both sexes. The second one, Stenocranus maculipes (Berg, 1879) collected from Echinodorus grandiflorum (Alismataceae), is proposed as Megamelus maculipes comb.nov. The female macropter holotype is redescribed and the male and female brachypters are described for the first time. Geographic distribution and biological data of both species are reported. The genus Eryngium is cited for the first time as host plant for the genus Megamelus. Additionally, a key is provided to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Megamelus nigrifasciatus; Megamelus maculipes; Apiaceae; Alismataceae; South America.
Ano: 2013 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802013000200005
Imagem não selecionada

Imprime registro no formato completo
A new species of Bryconadenos (Characiformes: Characidae) from the rio Curuá, rio Xingu drainage, Brazil Neotropical Ichthyology
Menezes,Naércio A.; Netto-Ferreira,André Luiz; Ferreira,Katiane M..
A second inseminating species bearing club cells organized into an anal-fin gland in sexually active males belonging to the genus Bryconadenos was recently discovered in the rio Xingu drainage and is described as new. It is distinguished from B. tanaothoros by the presence of a conspicuous dark blotch at the humeral region, and fewer scale rows between dorsal-fin origin and anal-fin origin. Males of B. weitzmani have longer pelvic fins at sizes beyond 30 mm SL. Bryconadenos weitzmani is further distinguished from B. tanaothoros by the cup shape of the anal-fin gland, its lower part much more developed than the upper, whereas in B. tanaothoros there is just a slit separating the almost equally developed upper and lower parts.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fish; South America; Neotropical; Insemination; Systematics; Taxonomy.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200003
Imagem não selecionada

Imprime registro no formato completo
A new species of Chomelia (Rubiaceae, Guettardeae) from the Brazilian Planalto Naturalis
Delprete, P.G..
During the ongoing treatment of the Rubiaceae for the Flora of the states of Goiás and Tocantins and the Flora of the Federal District of Brazil, a new species of Chomelia (C. kirkbridei Delprete) from the Brazilian Planalto was found, and is here described and illustrated. A key to the species of Chomelia occurring in the states of Goiás and Tocantins and the Federal District of Brazil, is also included.
Tipo: Article / Letter to the editor Palavras-chave: Guettardeae; Rubiaceae; Chomelia; Federal District; Goiás; Brazil; South America; Floristics; Taxonomy.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/525975
Imagem não selecionada

Imprime registro no formato completo
A New Species Of Cyclanthera (Cucurbitaceae, Sicyeae) From Southern South America Darwiniana
Lima,Luís F. P; Pozner,Raúl.
We describe and illustrate Cyclanthera oligoechinata (Cucurbitaceae, Sicyeae) a new species from southern Brazil (Paraná), northeastern Argentina (Misiones), and central and southern Paraguay (San Pedro). This new species resembles C. hystrix, C. eichleri and C. quinquelobata, but differs by its almost smooth fruits, and pistillate flowers and fruits on long, slender pedicels. A key to distinguish C. oligoechinata from the closest species is also included.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cucurbitaceae; Cyclanthera; South America; Taxonomy.
Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932008000200010
Imagem não selecionada

Imprime registro no formato completo
A new species of Leptometopa Becker, 1903 (Diptera, Milichiidae) and an identification key for the neotropical species of the genus Pap. Avulsos de Zool. (São Paulo)
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
Imagem não selecionada

Imprime registro no formato completo
A new species of Pimelodus LaCépède, 1803 (Siluriformes: Pimelodidae) from the rio São Francisco drainage, Brazil Neotropical Ichthyology
Ribeiro,Frank Raynner V.; Lucena,Carlos Alberto S. de.
Pimelodus pohli, new species, is described from the rio São Francisco drainage. It differs from congeners by the following characters in combination: adults with dark spots on anterodorsal region of body and young specimens (up to 100 mm SL) with three rows of dark spots laterally on body; comparatively long adipose fin, more than one third of the distance between posterior end of dorsal fin base and the vertical through posterior end of anal-fin base (21.8-26.2% SL); lips poorly developed; 20-25 gill rakers; and maxillary barbels slightly surpassing the caudal-fin base. A key to the species of Pimelodus of the rio São Francisco drainage is presented.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Catfish; Taxonomy; South America; Neotropical.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000400004
Imagem não selecionada

Imprime registro no formato completo
A new species of Sipapoantha (Gentianaceae: Helieae) from northern Brazil Naturalis
Lepis, K.B.; Maas, P.J.M.; Struwe, L..
A new species from Gentianaceae (tribe Helieae) is described from northern Brazil. Sipapoantha obtusisepala sp. nov. is distinct from the previously single member of the genus, Sipapoantha ostrina, by having a woody and branched habit, sessile and ovate leaves with an acute apex, and a smaller calyx with circular lobes. Sipapoantha obtusisepala is based on somewhat incomplete material and tentatively placed in Sipapoantha based on the presence of key generic characters such as coriaceous leaves with strongly revolute margins and blue corollas. It has only been recorded from one locality in the Brazilian-Guyana border area in the state of Roraima.
Tipo: Article / Letter to the editor Palavras-chave: Floristics; Gentianaceae; Helieae; Morphology; Neotropics; New taxa; Sierra Baeta; South America.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/525073
Imagem não selecionada

Imprime registro no formato completo
A new species of the genus Homolobus Foerster from Ecuador (Hymenoptera: Braconidae: Homolobinae) Naturalis
Achterberg, C. van; Shaw, S.R..
A new high elevation altitude species of the genus Homolobus Foerster (Hymenoptera: Braconidae: Homolobinae), H. fuscinervis spec. nov. from Ecuador (Napo province, 2163 m elevation) is described and illustrated.
Tipo: Article / Letter to the editor Palavras-chave: Hymenoptera; Braconidae; Homolobinae; Homolobus; Oulophus; Neotropical; South America; Ecuador; 42.75.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/315877
Imagem não selecionada

Imprime registro no formato completo
A revision of the South American species of Aphylla Selys, 1854 (Odonata: Gomphidae) Naturalis
Belle, J..
A revision is given of the 16 recognized South American species of the New World genus Aphylla Selys. Three new species are described and figured, viz. A. scapula (♂ holotype; Brazil, Territorio de Rondônia, Fazenda Rancho Grande), A. silvatica (♂ holotype: Ecuador, Provincia Napo, Limoncocha) and A. spinula (♂ holotype: Perú, Departamento de Cuzco, Río Urubamba). A. obscura (Kirby, 1899) and A. albinensis Belle, 1970, are considered junior synonyms of A. tenuis Selys, 1859, and A. brevipes Selys, 1854, respectively, while A. simulata Belle, 1964, is considered a synonym of A. dentata Selys, 1859. Separate identification keys to the males and the females of the South American species of Aphylla are provided.
Tipo: Article / Letter to the editor Palavras-chave: Aphylla; Gomphidae; Revision; South America; 42.75.
Ano: 1992 URL: http://www.repository.naturalis.nl/record/318221
Imagem não selecionada

Imprime registro no formato completo
A Ricardian Analysis of the Impact of Climate Change on South American Farms Chilean J. Agric. Res.
Niggol Seo,S; Mendelsohn,Robert.
This study estimates the impact of climate change on South American agriculture taking into account farm adaptations. The study used a Ricardian analysis of 2300 farms to explore the effects of global warming on land values. In order to predict climate change impacts for this century, were examined climate change scenarios predicted by three Atmospheric Oceanic General Circulation Models (AOGCM): the Canadian Climate Center (CCC), the Centre for Climate System Research (CCSR), and the Parallel Climate Model (PCM) models. Several econometric specifications were tested, and five separate regressions were run: for all farms, small household farms, large commercial farms, rainfed farms, and irrigated farms. Farmland values will decrease as temperature...
Tipo: Journal article Palavras-chave: Climate change; Agriculture; Ricardian approach; South America.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100007
Imagem não selecionada

Imprime registro no formato completo
A synopsis of the South American Lepidium (Brassicaceae) Darwiniana
Al-Shehbaz,Ihsan A..
Fifty native and 12 naturalized species of Lepidium grow in South America, and a key to all 62 species is presented. Three new species from Argentina (L. hickenii, L. pedersenii, and L. santacruzensis) and two from Peru (L. cuzcoensis and L. werffii) are described, illustrated, and their relationships to nearest relatives are discussed. The new combination Lepidium crassius is proposed. Furthermore, 19 taxa (Coronopus didymus var. macrocarpus, C. didymus var. procumbens, L. abrotanifolium var. steinmannii, L. affine, L. argentinum, L. auriculatum, L. bonariense var. pseudovirginicum, L. calycinum var. integrifolium, L. costaricense, L. cumingianum var. orbiculatum, L. cumingianum subsp. berteroanum, L. depressum, L. myrianthum, L. neglectum, L. parodii, L....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brassicaceae; Lepidium; South America; Taxonomy.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932010000200002
Imagem não selecionada

Imprime registro no formato completo
A systematic revision of Tatia (Siluriformes: Auchenipteridae: Centromochlinae) Neotropical Ichthyology
Sarmento-Soares,Luisa Maria; Martins-Pinheiro,Ronaldo Fernando.
The auchenipterid catfish genus Tatia is revised. Twelve species are recognized including three described as new. Tatia is diagnosed by the hyomandibula elongated anterodorsally, the anal-fin base of adult males reduced in length, and the caudal peduncle laterally compressed and deep with a middorsal keel. Tatia aulopygia occurs in the Madeira river drainage and is distinguished by the reduced cranial fontanel in adults and male modified anal fin with middle rays reduced in length. Tatia boemia, known from the upper Uruguay river drainage, is distinguished by its unique color pattern with dark chromatophores on the sides of body. Tatia brunnea from river basins in Suriname and French Guiana and the Negro river drainage, Amazon basin, is recognized by its...
Tipo: Info:eu-repo/semantics/article Palavras-chave: South America; Freshwater; Catfish; Taxonomy; Centromochlus.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000300022
Imagem não selecionada

Imprime registro no formato completo
Ancient feeding, ecology and extinction of Pleistocene horses from the Pampean Region, Argentina Ameghiniana
Sánchez,Begoña; Prado,José Luis; Alberdi,María Teresa.
To reconstruct the diet and habitat preference of fossil horses, we measured the carbon and oxygen isotope composition of 35 bone and tooth samples of Equus (Amerhippus) neogeus Lund, Hippidion principale (Lund), and Hippidion devillei (Gervais) from 10 different Pleistocene localities in the Pampean region (Argentina). To compare the three species by stratigraphic age, we divided the samples into three groups: lower Pleistocene, middle-late Pleistocene and latest Pleistocene. Samples of Hippidion devillei from the lower Pleistocene were more homogeneous, with δ13C values ranging between -11.73 to -9.79‰. These data indicate a diet exclusively dominated by C3 plants. In contrast, Hippidion principale and Equus (Amerhippus) neogeus from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Equus (Amerhippus); Hippidion; Paleodiet; Ecology; Extinction; Pleistocene; Papean region; South America.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000200012
Imagem não selecionada

Imprime registro no formato completo
Avaliacao do desempenho de cruzamentos entre racas taurinas e zebuinas em diferentes regioes do Brasil central. Infoteca-e
NOBRE, P.R.C.; PORTO, J.C.A.; MATTOS, S. de; ROSA, A. do N.; SILVA, L.O.C. da; MARIANTE, A. da S.; FIGUEIREDO, G.R. de; ABREU, G.P. de..
1984
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Bovino; Raca; Taurino; Cruzamento; America do sul; Brasil; Regiao Centro-Oeste; Desempenho; Cattle; Breed; Zebu; Crossbreds; South America; West Central Region; Brazil.
Ano: 1984 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/319794
Imagem não selecionada

Imprime registro no formato completo
Balanced fertilization for sustainable development of agriculture in the savannas of South America: a geographical approach. Repositório Alice
NAUMOV, A.; OLIVEIRA, R. P. de; PRADO, R. B.; TURETTA, A. P..
South American countries still possess considerable land reserves for agricultural development. Huge areas of virgin lands and natural pastures have been converted to agricultural crops and suffer increasing pressure. Growing demand for food in the world and attractiveness for capital investment drive this colonization further deep into the regions that cannot be converted to commercial agriculture without serious negative environmental consequences. Agricultural development in these areas neither can be considered economically sustainable, as high production costs sometimes surpass revenues from the harvest. Most of the recently colonized regions in South America are those under savanna landscapes, where low nutrient availability in the soil restricts...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sustainable development of agriculture; Mineral fertilizers; Savannas; Cerrado; South America; Brazil.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/949679
Imagem não selecionada

Imprime registro no formato completo
Baryancistrus demantoides and Hemiancistrus subviridis, two new uniquely colored species of catfishes from Venezuela (Siluriformes: Loricariidae) Neotropical Ichthyology
Werneke,David C.; Sabaj,Mark H.; Lujan,Nathan K.; Armbruster,Jonathan W..
Baryancistrus demantoides and Hemiancistrus subviridis are two new species of loricariids from southern Venezuela with an olive ground coloration and white to cream-colored or golden-yellow spots. Baryancistrus demantoides is known only from the upper río Orinoco drainage while H. subviridis is also known from the río Casiquiare drainage. In addition to its coloration, B. demantoides can be distinguished from all other ancistrins by having the dorsal and adipose fins connected by an expanded posterior section of the dorsal-fin membrane, golden-yellow spots confined to the anterior portion of the body, and greater than 30 teeth per jaw ramus. Hemiancistrus subviridis can be separated from all other ancistrins by coloration, lacking a connection between the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ancistrini; Catfish; Hypostominae; Neotropics; South America.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400011
Imagem não selecionada

Imprime registro no formato completo
Benefits from ecological study methods to taxonomy of enchytraeids in southern Mata Atlântica. Repositório Alice
SCHMELZ, R. M.; LA PEÑA, R. M. de; ROMBKE, J..
Abstract ? The objective of this work was to determine how taxonomy benefited from the ecological quantitative and site-based sampling methods in enchytraeids studies. Enchytraeids (small relatives of earthworms) were sampled in different phases of rain forest regeneration in the southern Mata Atlântica in Paraná, Brazil. The research combined ecological and taxonomic work, because enchytraeids are poorly studied and difficult to identify, and many new species were expected. The provision of large numbers of specimens enabled the test of species diagnoses by investigating the ranges of character variations in a larger series of specimens. Simplified species diagnoses adapted to the local conditions that allowed the identification of all specimens,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Clitellata; South America; Enchytraridae; Oligochaeta.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/660583
Imagem não selecionada

Imprime registro no formato completo
Black soil, green rice International Rice Research Institute
Haefele, Stephan M..
p.26-27
Tipo: Article Palavras-chave: Rice soils; South America; Amazon; Biochar; Soil fertility; Asia; Rice hulls.
Ano: 2007 URL: http://hdl.handle.net/10269/9
Registros recuperados: 115
Primeira ... 123456 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional