Chemical Ecology
Mostrando 37-48 de 95 artigos, teses e dissertações.
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37. DOSSIÊ DE AMBIÊNCIA E TRANSIÇÃO AGROECOLÓGICA NO MANEJO DA MICROBACIA HIDROGRÁFICA DO LAJEADO BIGUÁ, ALECRIM-RS / AMBIENCE DOSSIER AND AGRO ECOLOGY TRANSITION IN THE MANAGEMENT IN THE WATERSHED OF LAJEADO BIGUÁ, ALECRIM - RS
The atrophic disordinated action over an area leads to degradation of the natural resources, mainly the soil, water and native vegetation, changing the landscape, altering the ambience and bringing negative consequences to the social and economical conditions of the population. In such context, the current study had as its aims assess, through an ambience do
Publicado em: 2007
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38. Ecologia do bicudo-do-algodoeiro Anthonomus grandis Boheman, 1843 (Coleoptera:Curculionidae) no Cerrado do Brasil Central
The boll weevil Anthonomus grandis Boheman, 1843 (Coleoptera: Curculionidae), one of the main pests of cotton, was introduced in Brazil in 1983. It causes the most serious damage to the crop, such as the falling of the flower buds, destruction of bolls and reduced linter production. The serious pest status of the boll weevil is mainly due to its high reprodu
Publicado em: 2007
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39. Fauna do solo e outros atributos edáficos como indicadores da qualidade ambiental em áreas com Araucaria angustifolia no Estado de São Paulo / Soil fauna and others edaphics attributes as environmental quality indicators in areas with Araucaria angustifolia in São Paulo State, Brazil
The study of biological soil quality indicators in areas with Araucaria is very important to understand ecological processes in these systems, since groups of the soil fauna are major factors in the decomposition and mineralization of organic matter, as well as modifiers of soil physical, chemical and biological properties and processes. The objective of thi
Publicado em: 2007
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40. Chemical ecology of Brazilian bees: Melipona rufiventris, Melipona scutellaris, Plebeia droryana, Nannotrigona testaceicornis, Tetragonisca angustula and Centris trigonoides / Ecologia quimica de abelhas brasileiras : Melipona rufiventris, Melipona scutellaris, Plebeia droryana, Nannotrigona testaceicornis, Tetragonisca angustula e Centris trigonoides
A vida social das abelhas é marcada pela presença de várias substâncias produzidas por suas glândulas exócrinas e endócrinas ou coletadas na natureza. Estes compostos são empregados principalmente por operárias, machos e rainha no reconhecimento de seus companheiros de colônia, acasalamento, defesa do ninho e marcadores de percurso. Entre as abelha
Publicado em: 2007
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41. Reproductive behavior and sex pheromone identification of Pseudaletia sequax (Lepidoptera: Noctuidae) / Comportamento reprodutivo e identificação de feromônio sexual de Pseudaletia sequax (Lepidoptera: Noctuidae)
The effects of pupal period and age on calling behavior of virgin females of Pseudaletia sequax were determined. Larvae were reared on artificial diet. Calling behavior of groups of females of similar age of pupation was observed every 10 minutes for six days at reversed photoperiod. Females were considered calling when they had assumed a characteristic posi
Publicado em: 2007
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42. Hormônios sexuais estrógenos: contaminantes bioativos
Natural and synthetic estrogens have been detected in rivers, lakes and estuaries in several parts of the world. The primary sources of these compounds are the industrial and household effluents, which are not eliminated by the received treatment. This paper presents a brief description of the problem as well as the physical and chemical characteristics of t
Química Nova. Publicado em: 2006-07
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43. Chemical ecology of insect and Piperaceae species / Ecologia química de insetos e espécies de Piperaceae
The study was presented in six chapters that included several aspects of chemical ecology of insects and Piperaceae species as following: The Chapter 1 describes taxonomical aspects, natural history of the insects and field observation and the organization of hosts Piperaceae according to the observed feeding preferences of the associated insects. It was obs
Publicado em: 2006
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44. Respostas ecofisiológicas da comunidade perifítica in situ a diferentes condições ambientais no Rio Santa Maria da Vitória, ES
The physiological ecology responses of periphyton in the high course of the Santa Maria da Vitória (ES) river had been evaluated during one year, in two stations. The determined environmental variables had been: temperature, transparency, euphotic zone, depth, pH, OD, electric conductivity, STD, NO2 -, NO3 -, total-N, PO4 - and total-P. The Periphyton in na
Publicado em: 2006
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45. Indicadores de sustentabilidade em sistemas agroecolÃgicos por agricultores familiares do semi-Ãrido cearense / AgroecolÃgicos pointers of sustentabilidade in system lead by family agriculturists at the Cearà state semiarid
To evaluate the farmerâs perception about the changes in their systems and in some production pointers, the present work was developed with farmers that adopt cotton production systems in agroecolÃgicas bases at the Cearà state semiarid. The cotton plant production proposal in the commented bases has the effective participation of farmers in the whole pro
Publicado em: 2006
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46. Relações socioambientais entre ribeirinhos da Vila Primavera e o Arroio Passo Fundo (Guaíba/RS): Um estudo da fase IV do Projeto Para o Arroio Viver.
This work presents the study of the relations between the ribeirinhos (people who live on the side of the brooks) and Passo Fundo Brook, considering the social environmental interests and conflicts. In presence of these aspects, the complex thought of Edgar Morin and the environmental ethics allow us to enlarge and recapture the view of systemic interconnect
Publicado em: 2006
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47. Estudo das interaÃÃes planta-herbÃvoro em Laguncularia racemosa (L.) GAERTEN (COMBRETACEAE) no manguezal de MaracaÃpe, Ipojuca, PE
Interspecific competition is an important force in the ecology of the populations and communities of herbivores. An example that has been neglected is the competition between inductors of gall. These if characterize for being an atypical fabric transformation and/or vegetal agency, being able to be caused by mites, insects, etc. Better to understand the inte
Publicado em: 2006
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48. Estudo Comparativo entre os Constituintes Voláteis Liberados por Machos Ceratitis Capitata e Anastrepha obliqua (Diptera: Tephritidae) e seus Frutos Hospedeiros Preferencial Averrhoa carambola L. e Secundário, Carica papaya L.
Males of fruit flies (Diptera: Tephritidae) release a complex blend of chemical constituents to attract co-especific males and females (aggregation pheromone). Males fruit fly from the genus Bactrocera use chemicals acquired from their host by feeding as part of their aggregation pheromone. Considering this information, studies were carried out aiming to fin
Publicado em: 2005