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| Registros recuperados: 1.445 | |
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| Souto,KCFL; Pereira,CD; Lomônaco,C. |
| The aim of this study was to comparatively characterize the monthly variation and the sex ratio of Euxesta stigmatias (Loew) and Euxesta sororcula (Wiedermann) populations from a natural reserve and from a guava orchard. It was also investigated whether density and the climate factors affected the individuals' size and fluctuating asymmetry (FA). In both environments, E. sororcula predominated over E. stigmatias. The number of individuals of E. sororcula collected in the ecological station was significantly lower than the number of individuals caught in the orchard. However, the number of captured individuals of E. stigmatias did not differ between environments. Significant sex ratio differences were detected between the collection sites. Female's... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fluctuating asymmetry; Morphometry; Population dynamics. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000600005 |
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| Fidalgo,Adriana de O; Kleinert,Astrid de M P. |
| We describe the environment effects on the amount and quality of resources collected by Melipona rufiventris Lepeletier in the Atlantic Forest at Ubatuba city, São Paulo state, Brazil (44º48'W, 23º22'S). Bees carrying pollen and/or nectar were captured at nest entrances during 5 min every hour, from sunrise to sunset, once a month. Pollen loads were counted and saved for acetolysis. Nectar was collected, the volume was determined and the total dissolved solids were determined by refractometer. Air temperature, relative humidity and light intensity were also registered. The number of pollen loads reached its maximum value between 70% and 90% of relative humidity and 18ºC and 23ºC; for nectar loads this range was broader, 50-90% and 20-30ºC. The number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apidae; Atlantic Forest; Environment influence; Food resource; Floral origin. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600005 |
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| Ferreira,MG; Pinho,OC de; Balestieri,JBP; Faccenda,O. |
| This is a study of the population fluctuation of euglossine species, as well as their preferences for scent baits (cineole, eugenol, vanillin and methyl salicylate) in two forest strata (canopy and understory) at the Reserva Florestal do Azulão, a forest fragment located in the municipality of Dourados, MS, Brazil (22°12'S, 54°55'W). We collected a total of 529 males from four genera and eight species. Diversity and equitability for both strata (understory: H' = 1.195 and J' = 0.6139; canopy: H' = 1.193 and J' = 0.6131) did not show a significant difference and a high similarity index was found (P = 87.5%). On the other hand, abundance was substantially higher in the canopy (n = 358) than in the understory (n = 171). From the scents used, eugenol attracted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Equitability; Floral reward; Richness; Seasonality. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000600002 |
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| Sousa,JRP de; Esposito,MC; Carvalho Filho,FS. |
| This study was carried out in the Base Operacional Geólogo Pedro de Moura (BOGPM) in the Urucu River Basin, Coari, state of Amazonas, Brazil, during April, June, and October 2007, in 16 areas, 4 in primary forests (environment MT) and 12 in gaps (environments C1, C2, and C3) at different stages of vegetation recovery, with different plant cover height. We collected 3,547 specimens of flesh flies. The 3,525 individuals identified to species level included 10 genera, 6 subgenera, and 23 species. Sarcodexia lambens (Wiedemann) (47.1%) and Peckia (Peckia) chrysostoma (Wiedemann) (19.1%) were the most abundant species. The abundance patterns and estimated richness differed between the environments, and were separated in two groups, one of the gaps (C1, C2, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community; Ecology; Flesh fly; Anthropic impact. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100003 |
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| Landeiro,Victor L; Pepinelli,Mateus; Hamada,Neusa. |
| Taxonomically, blackflies (Simuliidae) are among the best-known aquatic insects in Brazil. However, information on their distribution is lacking for many regions. We sampled simuliids in 50 streams in the Chapada Diamantina region, State of Bahia, located in three distinct geographical areas, 20 at Lençóis, 18 at Mucugê, and 12 at Rio de Contas. We analyzed simuliid species richness and distribution in the Chapada Diamantina area as a whole, as well as in each of the three distinct geographical areas. We collected 20 species, three of which were not yet described and two were described after our sampling. The three areas are distinct in relation to environmental variables, mainly owing to differences in altitude and water pH. Four species were restricted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical stream; Brazilian savanna; Altitude; PH. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000300006 |
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| FRAGOSO,DANIEL B.; JUSSELINO FILHO,PEDRO; PALLINI FILHO,ANGELO; BADJI,CÉSAR A.. |
| O controle químico apresenta vantagens como economicidade e rapidez de ação, e tem sido preferencialmente usado no controle de pragas pelos agricultores. Em contrapartida, entre as desvantagens destaca-se o largo espectro de ação dos compostos, que atingem espécies não-alvos, como inimigos naturais, além de contaminarem o meio ambiente. O presente trabalho avaliou a ação dos inseticidas clorpirifós, dissulfotom, etiom e paratiom-metílico, normalmente usados para controlar o bicho-mineiro-do-cafeeiro Leucoptera coffeella (Guérin-Mèneville), sobre o ácaro predador Iphiseiodes zuluagai Denmark & Muma, agente de controle dos ácaros fitófagos Oligonychus ilicis (McGregor) e Brevipalpus phoenicis (Geijskes) em agroecossistema cafeeiro. Para verificar o... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Toxicidade; Cafeeiro; Controle químico; Controle biológico; Seletividade. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000300018 |
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| Zalazar,Laura; Salvo,Adriana. |
| Las prácticas de laboreo y las sustancias químicas sintéticas agregadas en los agroecosistemas convencionales perjudican principalmente a los enemigos naturales de los insectos fitófagos, disminuyendo la regulación de los insectos plaga. En la agricultura orgánica, en cambio, se favorecen los procesos biológicos y el cuidado del ambiente, por lo que se predice en este tipo de sistema un aumento de la biodiversidad. En este trabajo se compararon los niveles de abundancia y riqueza de insectos y la proporción de grupos funcionales realizando un único muestreo cuantitativo en tres campos de cultivo con prácticas de manejo orgánicas y tres convencionales. Mediante conteo visual de insectos en los cultivos se observó que la riqueza de especies, total y por... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroecosistema; Agricultura orgánica; Insecto; Enemigo natural; Manejo. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000500019 |
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| Specht,Alexandre; Guedes,Jerson V.C.; Sulzbach,Felipe; Vogt,Tatiane G.. |
| É registrada pela primeira vez a ocorrência de Rachiplusia nu (Guenée) em Nicotiana tabacum L. (Solanaceae). Os espécimes foram coletados em uma lavoura de fumo tipo Virgínia, em Venâncio Aires, RS. As lagartas ocorreram em grande número, causando expressivo desfolhamento das plantas e demandando controle químico para minimizar os danos. Essa ocorrência indica que R. nu pode se alimentar de fumo, do tipo Virgínia, que ocupa 80% da área cultivada com fumo no Rio Grande do Sul, apresentando, portanto, o risco de se tornar uma praga importante dessa cultura. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Insecta; Plusiinae; Falsa-medideira; Lagarta. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000500020 |
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| HOLMANN,FEDERICO; PECK,DANIEL C.. |
| Using a simulation model as an analysis tool, the economic impact of spittlebugs in pastures of Colombia was quantified in terms of animal production. Three levels of abundance (10, 25, 50 adults/m²) and farm area affected (25, 50, 100%) were evaluated using data obtained in Brazil for Notozulia entreriana (Berg) on Brachiaria decumbens Stapf. The model considered dual-purpose production systems in two contrasting ecosystems: (1) the dry tropics, characterized by a well defined, 6-month rainy season and (2) the humid tropics, characterized by uniform rainfall distribution throughout the year. Compared to healthy pastures, stocking rate, milk and meat productivity decreased 1-8, 8-34 and 38-54%, respectively, at low, intermediate and high abundance levels,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Economic impact; Forage grass; Pasture pests. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000200016 |
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| Evangelista-Martínez,Zahaed; Imbert-Palafox,José L; Becerril-Flores,Marco A; Gómez-Gómez,Juan V. |
| Triatoma barberi Usinger is a widely recognized vector of the protozoa Trypanosoma cruzi. The determination of its presence in the rural houses is made by direct observation of adults, nymphs, exuviae or eggs. For this reason, egg structural characteristics could facilitate the differentiation and identification of species that inhabit such environments. In here, the morphologic characteristics of eggs of T. barberi are described and analyzed with special attention to the anterior pole of the egg. The structural analysis of eggs by scanning electron microscopy (SEM) showed the presence of a wide and rough chorion edge, which contain aeropyles and micropyles. A deep spermatic canal between the endochorion and exochorion, and a trabecular network in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SEM; Operculum; Chagas vector. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000200010 |
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| Torres,Adalci L.; Barros,Reginaldo; Oliveira,José V. de. |
| Avaliou-se o efeito de extratos aquosos de diferentes espécies de plantas no desenvolvimento de Plutella xylostella (L.). Discos de couve, Brassica oleracea var. acephala, 'Portuguesa' foram imersos em cada extrato e, após secos ao ar livre, foram inoculados com 12 larvas recém-eclodidas (<12h) de P. xylostella e então mantidos em placas de Petri. As avaliações foram realizadas, a cada dois dias, e os discos foliares foram substituídos por outros, submetidos aos mesmos tratamentos e procedimentos descritos acima. A duração da fase larval de P. xylostella foi alongada pelos extratos aquosos de Melia azedarach L. Cissampelos aff. glaberrima St. Hil. em 3,5 e 1,7 dias, respectivamente. Os extratos de Aspidosperma pyrifolium Mart., Azadirachta indica A.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Traça-das-crucíferas; Planta inseticida; Repolho. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000100022 |
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| Jacobs,Jennifer; Nole,Inés; Palminteri,Susanne; Ratcliffe,Brett. |
| Dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) compete intensively for dung resources, and most species forage in the understory. Here, we describe the unique behavior of one dung beetle species, Canthon aff. quadriguttatus (Olivier), associated with two species of monkeys from Peru. We observed this beetle species on the genital and anal regions of the brown titi monkey, Callicebus brunneus (Wagner), and subsequently falling with dung as the monkeys defecated. The same association was also observed with the bald-faced saki monkey, Pithecia irrorata irrorata (Gray). Using the " sit and wait" at the source behavior, C. quadriguttus may arrive first at the dung resource, possibly out-competing other dung beetle species. This paper is the first report... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Resource partitioning; Phoresy; Niche specialization. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000600003 |
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| Giangarelli,Douglas C; Freiria,Gabriele A; Colatreli,Olavo P; Suzuki,Karen M; Sofia,Silvia H. |
| Eufriesea violacea (Blanchard) is a very seasonal euglossine species, more frequently found in the southern and southeastern regions of Brazil. A number of studies have revealed large variations in the abundance of males of this species present in Atlantic Forest remnants throughout both regions. In this paper, we report variations in the abundance of E. violacea males sampled in several forest patches of different sizes (ranging from 10 to 580 ha), and we propose that this species is possibly sensitive to the reduction in size of forest remnants. Surveys were carried out in nine forest remnants of Atlantic rainforest located in northern Paraná State, southern Brazil. Male euglossine bees were collected with an entomological net when visiting scent-baits,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Atlantic rainforest; Euglossine bee; Euglossini; Bee abundance; Neotropics. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000500008 |
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| Rosa,Juan R; Salomon,Oscar D; Andrade Filho,José D; Carvalho,Gustavo M L; Szelag,Enrique A; Stein,Marina; Tapia,Eliana S; Brazil,Reginaldo P. |
| The phlebotomine sandflies of the province of Chaco, Argentina, are poorly known, with reports from more than 40 years or captures related with outbreaks of leishmaniasis. In here, Mycropygomyia peresi (Mangabeira) is reported for the first time in Argentina, extending the known dstribution of Migonemyia migonei (França), Evandromyia sallesi (Galvão & Coutinho), Mycropygomyia quinquefer (Dyar), Brumptomyia brumpti (Larousse) y Nemapalpus spp to the province of Chaco. Mg. migonei, together with Nyssomyia neivai (Pinto), Evandromyia cortelezzii (Brèthes), and Psathyromyia shannoni (Dyar) also captured in Chaco, were incriminated as vectors of Leishmania in Argentina. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Leishmaniasis; Migonemyia migonei; Evandromyia sallesi; Mycropygomyia quinquefer; Mycropygomyia peresi. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000200024 |
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| Registros recuperados: 1.445 | |
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