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| Registros recuperados: 1,641 | |
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| Brito,Joás; Louback-Franco,Nayara; Mendoza,Cristian; Nonato,Flávia; Juen,Leandro; Michelan,Thaisa. |
| Abstract The struggle to control insect-borne diseases can lead to make rash decisions. For instance, the controversial method of planting of Crotalaria spp. to attract predatory dragonflies can be used to control insect vectors of dengue fever and several other medically significant insect-borne diseases. Nevertheless, there is no scientific support for this assumption. Despite the lack of evidence, in Brazil, there remains a multitude of online articles and grey literature sources still promote Crotalaria planting as a means to prevent dengue fever. Here we discuss the reasons why Odonata would not be attracted by Crotalaria and, therefore, it cannot not be considered as an efficient method for vector control. Finally, the best practice to avoid the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mosquitoes; Tropical diseases; Zika; Invasive species. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000200401 |
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| Costa,Deiler Sampaio; Paula,Tarcízio Antônio Rego de. |
| Objetivou-se com esta pesquisa testar dois protocolos de eletroejaculação e estudar a motilidade espermática progressiva, vigor, concentração e alterações morfológicas dos espermatozóides de catetos adultos criados em cativeiro. Utilizaram-se seis machos com idade entre 10 e 18 anos. Os animais foram anestesiados com cloridrato de zolazepan e cloridrato de tiletamina e em seguida coletou-se o sêmen com auxílio de um eletroejaculador. O volume médio do ejaculado foi 3,11 + 0,9mL, a motilidade espermática progressiva foi 48,7 ± 31,5%, o vigor, 2,1 + 1,4 e a concentração espermática média, 87,0 + 53,1 x 10(6) sptz/mL. Concluiu-se com esta pesquisa que a utilização de três sessões de 15 estímulos de 12 volts foi suficiente para coleta de sêmen de catetos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tayassu tajacu; Sêmen; Eletroejaculação. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300009 |
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| Penz,Carla Maria; Mohammadi,Neda. |
| This study describes and compares the diverse dorsal and ventral wing color patterns of Brassolini butterflies. Thirty-three species are illustrated, where pattern elements of the nymphalid ground plan are labeled in color. In general, a larger number of pattern elements can be identified on the ventral than on the dorsal surface of both wings, and the forewing has a larger number of discernible pattern elements than the hind wing. The dorsal elements are broad, diffuse, and more difficult to identify against the typically brown brassoline wing background color. Species with a light colored dorsal background served as a guide for our proposal that fewer pattern elements are present dorsally, particularly on the hind wing. Colorful bands or markings... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Butterfly; Wing color; Nymphalid ground plan; Eyespots; Ocelus; Caligo. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300154 |
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| Medeiros,Herison; Castro,Wendeson; Salimon,Cleber Ibraim; Silva,Izaias Brasil da; Silveira,Marcos. |
| Forest fragmentation affects the structure and dynamics of plant communities, leading to biodiversity loss in forest remnants. In this paper we show that in a bamboo (Guadua weberbaueri Pilger) dominated forest fragment in southwestern Amazonia edge effect may be confounded by bamboo effect, which also occur inside the forest. We measured growth, mortality and, recruitment rate of trees with DBH ≥ 10 cm, in a fragment of bamboo dominated open forest in southwestern Amazonia, state of Acre, Brazil, in 15 plots at the forest edge and 15 plots inside the forest fragment, 500 m away from the border. Time interval between censuses was 1.8 years. The average diameter growth rate differed significantly between edge (3.82 ± 0.10 mm a-1) and interior (2.39 ± 0.18... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest fragmentation; Edge effect; Open forest with bamboo; Plant communities; Forest succession; Tropical forest dynamic. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200029 |
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| Assis,Marco Antonio; Prata,Eduardo Magalhães Borges; Pedroni,Fernando; Sanchez,Maryland; Eisenlohr,Pedro Vasconcellos; Martins,Fernando Roberto; Santos,Flavio Antonio Maës dos; Tamashiro,Jorge Yoshio; Alves,Luciana Ferreira; Vieira,Simone Aparecida; Piccolo,Marisa de Cássia; Martins,Susian Christian; Camargo,Plínio Barbosa de; Carmo,Janaina Braga do; Simões,Eliane; Martinelli,Luiz Antonio; Joly,Carlos Alfredo. |
| Foram avaliadas semelhanças florísticas entre duas fisionomias de Floresta Atlântica na região costeira do Brasil, denominadas Floresta de Restinga e Floresta das Terras Baixas. A hipótese era que, devido à diferença nos processos geomorfológicos, essas duas florestas difeririam em variáveis físico-químicas dos solos, composição florística, biomassa aérea e produção de serapilheira. O trabalho foi conduzido em uma área de 1 ha (100 × 100 m) em cada tipo de floresta, no município de Ubatuba, São Paulo. Foram registrados e medidos todos os indivíduos arbóreos com DAP > 4,8 cm e coletadas amostras de solo e serapilheira. As análises de agrupamento e de ordenação indicaram que os solos e principalmente a flora distribuem-se como grupos bem definidos,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floresta atlântica; Biomassa; Serapilheira; Análise multivariada. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200012 |
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| Gomiero,Leandro Muller; Briani,Denis Cristiano; Giasson,Luís Olímpio Menta. |
| A análise da alimentação da pirapitinga do sul (Brycon opalinus), peixe ameaçado de extinção de rios da Mata Atlântica da Serra do Mar na região Sudeste, revelou a ocorrência de itens alimentares incomuns. As espécies deste gênero são onívoras oportunistas e alimentam-se de itens vegetais e animais, tais como: flores, folhas, frutos e sementes e grande variedade de insetos. Em três rios do Parque Estadual da Serra do Mar - Núcleo Santa Virgínia foram encontrados exemplares de B. opalinus que consumiram três itens animais incomuns, os anfíbios Hypsiboas aff. pardalis (Anura, Hylidae) e Eleutherodactylus guentheri (Anura, Leptodactylidae) e o mamífero Oligoryzomys cf. nigripes (Rodentia, Sigmodontinae). O registro do consumo destas espécies de vertebrados... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Anura; Rodentia; Pirapitinga do sul; Mata Atlântica; Predação; Preservação. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000300015 |
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| Manso,Cynthia Lara de Castro. |
| The ophiuroids collected during the Oceanographic Expedition PUCK (SONNE-156) in 2001, in the framework of the project "Interactions between productivity and environment along the Chilean continental shelf" were analyzed. Eight samples had ophiuroids; Fifteen species were distributed in the following families: Gorgonocephalidae (2), Asteronychidae (2), Ophiomyxidae (1), Ophiacanthidae (2), Ophiuridae (5), Amphiuridae (1), and Ophiolepididae (2). Four species were recorded for the first time from Chilean waters, i.e., Asteronyx loveni Müller & Troschel, Astrodia tenuispina Verrill, Ophiolimna bairdi (Lyman), and Ophiocten amitinum Lyman, and three are new, i.e., Ophiura (Ophiuroglypha) arntzi sp. nov., Amphiophiura gallardoi sp. nov., and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ophiuroid; Deep-water; Chilean continental margin; Chilean abyssal zone; Taxonomic diversity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000200023 |
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| Rosado,Bruno Henrique Pimentel; Martins,Amanda Cristina; Colomeu,Talita Cristina; Oliveira,Rafael Silva; Joly,Carlos Alfredo; Aidar,Marcos Pereira Marinho. |
| Fine roots, <2 mm in diameter, are responsible for water and nutrient uptake and therefore have a central role in carbon, nutrient and water cycling at the plant and ecosystem level. The root length density (RLD), fine root biomass (FRB) and vertical fine root distribution (VRD) in the soil profile have been used as good descriptors of resource-use efficiency and carbon storage in the soil. Along altitudinal gradients, decreases in temperature and radiation inputs (depending on the frequency of fog events) may reduce decomposition rates and nutrient availability what might stimulate plants to invest in fine roots, increasing acquisition of resources. We evaluated the seasonal variation of fine root parameters in a Lowland and Montane forest at the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altitudinal variation; Fine root parameters; Vertical distribution of fine roots; Seasonality; Atlantic rain forest. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300018 |
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| Anjos,Marcelo Rodrigues dos; Machado,Nadja Gomes; Pedersoli,Mizael Andrade; Pedersoli,Nátia Regina Braga; Barros,Bruno Stefany; Lourenço,Igor Hister; Barreiros,João Pedro. |
| Abstract: This study presents an inventory of the ichthyofauna of the lower Roosevelt River sub-basin and its associated tributaries. Fish sampling with fishing nets and measurements of environmental parameters of water occurred in November/2012 (rising water), February/2013 (flooding), May/2013 (falling water) and August/2013 (drought). Depth mean was 8.86 m, water transparency was 0.6 m, conductivity was 22.7 µS.cm-1, pH was 6.59, dissolved oxygen was 7.63 mg.l-1 and temperature was 28°C. The total estimated capture area was 68,829.6 m2 during 2,880 hours. The catch per unit Effort (CPUE) was 0.37 individuals m-2.day-1. Species were spatially aggregated in all sampling points and river water levels. A total of 5,183 individuals distributed in 7 orders,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Icthyofauna; Inventory; Biodiversity; Madeira River Basin. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400308 |
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| Santos,Mirane de Oliveira; Cordeiro,Wesley Patrício Freire de Sá; Sales,Margareth Ferreira de; Silva,Juliana Santos. |
| Abstract: Bernardia and Tragia are genera of the subfamily Acalyphoideae, with species occurring in tropical and subtropical regions. Studies concerning those genera are scarce in Brazil, including Northeastern Brazil. The present study was designed to study the taxonomy of species occurring there, and provides illustrations, keys, descriptions, and comments concerning taxonomic affinities, as well as information concerning their geographic distributions and environmental preferences. A total of 13 species were encountered, eight of Bernardia and five of Tragia. Of those, B. hamadryadica and T. cearensis are endemic to Northeastern Brazil and B. celastrinea, B. pulchella, and T. chlorocaulon are new records for the region. The two genera occur in moist... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bernardieae; Floristic; New occurrences; Plukenetieae; Tragiinae. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000300301 |
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| Flores-Lopes,Fábio; Cetra,Mauricio; Malabarba,Luiz Roberto. |
| Este trabalho utiliza índices ecológicos em taxocenoses de peixes (constância de ocorrência, diversidade de espécies, riqueza, equitabilidade, índice de qualidade integrado (IQ)) como instrumento de avaliação da degradação ambiental. As amostragens foram padronizadas e realizadas sazonalmente durante dois anos, com rede de arrasto do tipo picaré, em onze pontos da bacia hidrográfica do lago Guaíba. Os pontos que apresentaram maior regularidade sazonal nos índices coincidem com locais de melhor qualidade ambiental indicados por outros fatores (frequência de anomalias, DBO5, temperatura, coliformes totais, oxigênio dissolvido). O cálculo do índice de qualidade integrado (IQ), entretanto, foi extremamente influenciado pela abundância e riqueza de espécies,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Impacto ambiental; Índice de qualidade; Lago Guaíba. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000400024 |
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| Cabral,Sofia de O.; Freitas,Itainara da S.; Morlanes,Viviane; Katzenberger,Marco; Calabuig,Cecilia. |
| Abstract: The boa (Boa constrictor) is considered a top predator and its diet includes a wide variety of birds, mammals, and other reptiles, all related directly to their availability in the environment inhabited by the snake. Seven boas were found roadkilled on highways adjacent to conservation units in the semi-arid region of Rio Grande do Norte state, in northeastern Brazil. Their digestive tract was analyzed to identify food items and classify them according to their orientation in the tract. Among the food items found, the white-eared opossum (Didelphis albiventris) and the black-and-white tegu (Salvator merianae) were ingested head-first, while teeth of a punaré (Thrichomys laurentius) and a Spix's yellow-toothed cavy (Galea spixii) and hairs of an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Feeding behavior; Snake; Seed dispersal; Zoochory. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400203 |
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| Registros recuperados: 1,641 | |
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