Borrero-Echeverry, Felipe
(2016).
Social and environmental olfactory signals mediate insect behavioral ecology and evolution.
Diss. (sammanfattning/summary)
Alnarp :
Sveriges lantbruksuniv.,
Acta Universitatis Agriculturae Sueciae, 1652-6880
; 2016:65
ISBN 978-91-576-8632-9
eISBN 978-91-576-8633-6
[Doctoral thesis]
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6MB |
Abstract
Odors are essential in mediating insect reproductive behavior. Environmental odors help insects locate suitable feeding or egg-laying sites and avoid suboptimal hosts or dangerous habitats. Sex pheromones, on the other hand, are responsible for mate finding and elicit courtship and mating. Although pheromones elicit stereotypical behaviors on their own, they are embedded in a background of environmental odors in nature. Using the cotton leafworm, Spodoptera littoralis, and the common fruit fly, Drosophila melanogaster, I studied the effect of blending environmentally relevant odors with pheromones on insect behavior.
For the cotton leafworm, we first developed an attractive cotton volatile blend. We next used this blend to determine the physiological effect of DMNT, a strong behavioral antagonist, on the cotton leafworm olfactory system. I then blended the individual volatiles and volatile blends with an incomplete and complete pheromone. The combination of cotton volatiles and the complete pheromone elicits attraction. Deviations from this optimum, either by changing the pheromone composition or the cotton volatile blend strongly reduces male S. littoralis attraction.
I then used the fruit fly to study the effect of food (vinegar) and habitat (yeast) volatiles on fly attraction towards pheromones. Starvation affects attraction towards a blend of vinegar and a male produced pheromone in a sexually dimorphic way. We next describe a novel female fruit fly pheromone and the odorant receptor involved in its perception. Finally, we show that vinegar and yeast volatiles interact in a different manner with male and female produced pheromones, suggesting that although vinegar is a good feeding cue, even in the presence of pheromones, it is not an appropriate mate finding cue.
My findings suggest that pheromones and host volatiles function as a single unit that mediates insect behavior, rather than as individual components. As such the olfactory cues that mediate mate finding in insects are under both natural and sexual selection simultaneously, which has strong implications for insect speciation and evolution.
Authors/Creators: | Borrero-Echeverry, Felipe | ||||||||||||||
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Title: | Social and environmental olfactory signals mediate insect behavioral ecology and evolution | ||||||||||||||
Series Name/Journal: | Acta Universitatis Agriculturae Sueciae | ||||||||||||||
Year of publishing : | 18 May 2016 | ||||||||||||||
Depositing date: | 18 May 2016 | ||||||||||||||
Number: | 2016:65 | ||||||||||||||
Number of Pages: | 62 | ||||||||||||||
Papers/manuscripts: |
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Place of Publication: | Alnarp | ||||||||||||||
Publisher: | Department of Plant Protection Biology, Swedish University of Agricultural Sciences | ||||||||||||||
ISBN for printed version: | 978-91-576-8632-9 | ||||||||||||||
ISBN for electronic version: | 978-91-576-8633-6 | ||||||||||||||
ISSN: | 1652-6880 | ||||||||||||||
Language: | English | ||||||||||||||
Publication Type: | Doctoral thesis | ||||||||||||||
Full Text Status: | Public | ||||||||||||||
Agris subject categories.: | H Protection of plants and stored products > H10 Pests of plants | ||||||||||||||
Subjects: | (A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Behavioural Sciences Biology (A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Evolutionary Biology (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science | ||||||||||||||
Agrovoc terms: | spodoptera littoralis, drosophila melanogaster, pest insects, reproductive behaviour, sex pheromones, olfaction, host plants, volatile compounds, chemical ecology, defence mechanisms, natural selection | ||||||||||||||
Keywords: | Spodoptera littoralis, Drosophila melanogaster, pheromones, host volatiles, chemical ecology, olfaction, host plant volatiles, herbivore-induced plant volatiles, sexual selection, natural selection | ||||||||||||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-3445 | ||||||||||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3445 | ||||||||||||||
ID Code: | 13387 | ||||||||||||||
Faculty: | LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap | ||||||||||||||
Department: | (LTJ, LTV) > Department of Plant Protection Biology | ||||||||||||||
External funders: | FORMAS | ||||||||||||||
Deposited By: | Mr Felipe Borrero | ||||||||||||||
Deposited On: | 19 May 2016 08:50 | ||||||||||||||
Metadata Last Modified: | 10 Sep 2020 13:41 | ||||||||||||||
Project info: | |||||||||||||||
Name: | Insect Chemical Ecology, Ethology and Ecolution | ||||||||||||||
Acronym: | ICE3 |
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