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Previous issue date: 2013-06-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The process of host-plant selection is the main interface in the herbivore-plant
interactions, with deep consequences for the ecology and evolution of those groups. In
this work, we investigate some steps of the host-plant selection in two congeneric
species of seed beetles. In the first chapter, we assess the oviposition pattern and larval
survival in the seed-beetle G. cavillator to evaluate whether oviposition site choices
maximize offspring survival, accounting for the spatially hierarchic structure of the
system. In the second chapter, we analyze the fine-scale positioning of G. speculifer
eggs, and explore the role of geometric constraints in the egg distribution patterns.
Altogether our results exemplify how small differences in key traits of the host-plant
selection can lead to significant differences in the interaction between herbivore insects
and their host plants. / O processo de seleção de plantas hospedeiras é a principal interface nas
interações herbívoro-planta, com profundas consequências para a ecologia e evolução
destes grupos. Neste trabalho investigamos algumas etapas da seleção de hospedeiras
em duas espécies co-genéricas de besouros bruquíneos. No primeiro capítulo avaliamos
o padrão de oviposição e de sobrevivência das larvas de G. cavillatorpara testar se as
escolhas das fêmeas estão de acordo com as expectativas da teoria de oviposição ótima,
considerando a estrutura espacialmente hierárquica do sistema. No segundo capítulo
analisamos a seleção em fina-escala da posição dos ovos nas vagens pelas fêmeas de G.
speculifer, e exploramos o papel da restrição geométrica da vagem em definir o padrão
de distribuição dos ovos. Tomados em conjunto, os resultados dos dois capítulos
exemplificam como pequenas diferenças em atributos-chave do processo de seleção de
hospedeiras podem levar a importantes diferenças na interação entre insetos herbívoros
e suas plantas hospedeiras.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.bc.ufg.br:tede/3154 |
| Date | 02 June 2013 |
| Creators | Bergamini, Leonardo Lima |
| Contributors | Almeida-Neto, Mário |
| Publisher | Universidade Federal de Goiás, Programa de Pós-graduação em Ecologia e Evolução (ICB), UFG, Brasil, Instituto de Ciências Biológicas - ICB (RG) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFG, instname:Universidade Federal de Goiás, instacron:UFG |
| Rights | http://creativecommons.org/licenses/by-nc-nd/4.0/, info:eu-repo/semantics/openAccess |
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