Made available in DSpace on 2015-03-26T13:30:47Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1787058 bytes, checksum: 9eecdb20460409c66b549cfa0f842314 (MD5) Previous issue date: 2013-07-24 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / O manejo de habitat, uma abordagem do controle biológico conservativo, o tem como objetivo alterar habitats através da manipula ção de recursos de origem vegetal na paisagem para melhorar a disponibilidade de recursos para os inimigos naturais. As plantas daninhas têm sido amplamente usadas para esse fim em agroecossistemas devido ao seu potencial de fornecer recursos al- ternativos para os inimigos naturais, mesmo quando as densidades de pragas são baixas. No entanto, há uma escassez de informações relativas aos recursos fornecidos por plantas daninhas e suas interações com os inimigos naturais. Para que o manejo de habitat seja uma prática funcional, ́é necessário o conhecimento detalhado do comportamento de forrageamento e da capacidade sensorial de inimigos naturais. A fim de contribuir para esse entendimento, estudei a atratividade e os efeitos de recursos fornecidos pela planta daninha Bidens pilosa, conhecida como picão-preto, utilizando plantas de tomate como a cultura principal, para o predador generalista Cycloneda sanguinea. As fêmeas de C. sanguinea são capazes de reconhecer os sinais químicos do picão-preto, mas elas não discriminam entre os estímulos do picão-preto ou das plantas de tomate. No campo, a ocorrência de C. sanguinea no picão-preto não depende da presença de pulgoẽs e isso só é evolutivamente estável a se a joaninha obtém vantagens da visita na planta. Os recursos alternativos fornecidos pelo picão-preto e pelas plantas de tomate, em conjunto ou não, não afetou a taxa de oviposição de C. sanguinea, tanto na presença quanto na ausência de pulgões. Entretanto, uma dieta com apenas os recursos fornecidos pelas plantas testadas aqui não é suficiente para promover a a sua oviposição. Porém, estes recursos podem aumentar a sobrevivência de casais de joaninhas adultas de forma significativa. A sobrevivência de C. e sanguinea foi significativamente maior na combinação picão-preto e plantas de tomate do que no tomate sozinho, mas não foi diferente do picão-preto somente. Concluindo, C. sanguinea pode usar pistas químicas do picão-preto durante o forrageamento e os recursos oferecidos pela planta podem permitir que este predador persista no campo quando os recursos-presa são escassos, o que pode levar a uma melhora na sua eficiência como agente de controle e biológico. / Habitat management is a conservation biological control approach that aims to alter habitats through manipulating plant-based resources in the landscape to increase the availability of resources for natural enemies. Weed commu- nities have been adopted for habitat management in agroecosystems due to their potential to supply food resources to natural enemies, even when pest densities are low. However, there is a paucity of information pertaining to the resources provided by non-crop weeds and their interactions with natural enemies. To make the management of non-crop weeds a functional practice, detailed knowledge of the behavior and sensory ability of natural enemies is necessary. In order to contribute to such understanding, I studied the attrac- tiveness and the effects of resources provided by the weed hairy beggarticks (non-crop), using tomato plant as the main crop, on the generalist predator Cycloneda sanguinea. I found that C. sanguinea females are able to recognize cues from hairy beggarticks but they do not discriminate between cues from hairy beggarticks or tomato plants. In the field, the occurrence of C. san- guinea on hairy beggarticks plants does not depend on the presence of aphids and it is only evolutionary stable if the ladybird gains advantage from visiting the plant. The alternative resources provided by the hairy beggarticks and tomato plants, either together or separate, did not affect the oviposition rate of C. sanguinea, both in the presence and absence of aphid prey. Hence, a diet with only the resources provided by the plants is not enough to promote their oviposition. Nevertheless, these resources were found to increase adult survivorship significantly. Survival of C. sanguinea was significantly higher on the combination of tomato plants plus hairy beggarticks than on tomato plants alone but was not different from hairy beggarticks alone. Concluding, C. sanguinea can use cues from hairy beggarticks when foraging and the re- sources offered by plants may allow them to persist in the field when prey resources are scarce which might improve its efficiency as biological control agent.

Martin Lindstrom (2005a) 指出除了視覺，嗅覺其實才是人類五官中最重要的，然而目前國內嗅覺相關之研究仍相當稀少。本研究由消費者之觀點出發，主要探討嗅覺線索與標的產品之一致性與否對消費者態度與購買意願的影響，並分析在「涉入程度」及「品牌概念」的調節作用下，對上述關係有何影響。 本研究經由前測，選擇手錶與運動鞋兩產品類別進入正式實驗，手錶產品類別中，以Swatch為象徵型品牌，CASIO為功能型品牌；運動鞋產品類別則以Puma為象徵型品牌，New Balance為功能型品牌。並以模擬的8張彩色平面廣告，施測於530位政大大學部之學生，進行2 (產品類別：手錶/運動鞋) x 2 (嗅覺線索：一致/不一致) x 2 (涉入程度：高/低) x 2 (品牌概念：象徵型品牌/功能型品牌) 的正式實驗。 研究結果顯示：一、就嗅覺線索主效果而言，與標的產品不一致的嗅覺線索比一致性之嗅覺線索更能提高消費者對產品的評價。二、在品牌概念的調節作用下，與標的產品不一致的嗅覺線索比一致性的嗅覺線索更能提升消費者對產品的評價，此情況在消費者面對功能型品牌時比象徵型品牌還要明顯。 整體而言，嗅覺線索的確會影響消費者對產品之評價。本研究提供行銷人員未來在採用嗅覺線索時，可考量的更多因素，以選擇合適的嗅覺線索加以應用。 / Martin Lindstrom (2005a) pointed out that other than sight, smell is the most important sense in the human anatomy. However, research on smell is still rare. This research sets out from the consumer perspective to discuss the effects that consistency between olfactory cues and target products have on purchase intention. Moderating effects of involvement and brand concept are also studied for their effects on the study. Watches and sport shoes were selected as the target products for this study. The symbolic brand in the watch category is Swatch, whereas the functional brand is CASIO; in terms of sport shoes, the symbolic brand is Puma, while the functional brand is New Balance. A2 (product category: watch / sport shoes) x 2 (olfactory cues: congruity / incongruity)x 2 (involvement: high / low) x 2 (brand concept: symbolic brand /functional brand) experimental design collected data from 530 Chengchi university students through 8 color printed advertisements. Research findings indicate the following. (1) In terms of the main olfactory cue effect, olfactory cues that are incongruent with the target product can better increase consumers’ evaluation of the product than congruent olfactory cues. (2) In terms of the brand concept moderating effect, olfactory cues that are incongruent with the target product can better increase consumers’ evaluation of the product than congruent olfactory cues. This is more evident when consumers deal with functional brands than when dealing with symbolic brands. To sum up, olfactory cues do in fact influence consumers’ evaluations of products. This study provides marketers with numerous factors that should be considered when selecting the adequate olfactory cues.