Diversity of chemosensory behaviour in the Drosophila genus
This thesis work explores the diversity of olfactory behaviour of Drosophila species in a comparative approach. We identify differences in the levels of attraction of the larva of eight species, towards natural odours derived from their ecologies. We relate these differences to distinct chemotaxis s...
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| Tipo de documento: | tese |
| Estado: | Versão publicada |
| Data de publicação: | 2017 |
| País: | España |
| Recursos: | CBUC, CESCA |
| Repositório: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/664282 |
| Acesso em linha: | http://hdl.handle.net/10803/664282 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Olfaction Drosophila species Quimiotaxis Chemotaxis Foraging Green pesticides Olfato Especies Drosophila Forrajeo Pesticidas ecológicos 612 |
| Resumo: | This thesis work explores the diversity of olfactory behaviour of Drosophila species in a comparative approach. We identify differences in the levels of attraction of the larva of eight species, towards natural odours derived from their ecologies. We relate these differences to distinct chemotaxis strategies that arise from the unique modulation of various sensorimotor variables, as well as to genetic changes occurring at the level of the odorant receptors genes. Further, we detail the organisation of behavioural sequences of larval locomotion in different Drosophila species, and reveal unique foraging styles that result in differentiated strategies of escape and confinement responses in the presence of light gradients, known to mediate avoidance in Drosophila. We also describe the existence of striking dichotomies of odour preferences between species, resulting in a prominent shift from attraction to aversion in the Drosophila suzukii larva, and detail how this finding revealed odours with toxic modes of action, conferring paralysis on the adult fly of only some Drosophila species, and their potential application as green pesticides. |
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