dc.contributor.author |
McArthur, Clare
|
|
dc.contributor.author |
Finnerty, Patrick B.
|
|
dc.contributor.author |
Schmitt, Melissa H.
|
|
dc.contributor.author |
Shuttleworth, Adam
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|
dc.contributor.author |
Shrader, A.M. (Adrian)
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|
dc.date.accessioned |
2019-09-13T10:09:48Z |
|
dc.date.issued |
2019-09 |
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dc.description.abstract |
To forage nonrandomly, animals must discriminate among food items. Foods differ in look, smell and taste, providing cues for foragers with appropriate senses. Irrespective of the sensory modality, however, foragers can only use cues effectively if they can detect sensory signals above background noise. Recent evidence shows that foraging mammalian herbivores can detect plant odours, but their capacity to select preferred plants in a noisy olfactory background is unknown. Using choice trials, we tested whether the African elephant, Loxodonta africana, uses plant odour as a salient cue despite increasingly complex and challenging background odours. We first established their preference for familiar plant species. We then tested their capacity to discriminate and select preferred plants based on odour alone. We found that elephants successfully chose preferred species even when presented with complex background odours from nonpreferred plants mimicking multispecies vegetation patches. Elephants also succeeded despite our attempt to mask distinguishing odours with large amounts of a synthetic green leaf volatile. GC–MS analysis confirmed that volatile organic compound profiles differed between plant species. In demonstrating that elephants exploit plant odours even when the signal from preferred plants is embedded in sensory noise of background odours, we provide crucial behavioural evidence that olfaction provides an efficient mechanism for selective, nonrandom foraging. Whether mammalian herbivores recognize novel odours, for example from newly invading plant species, or when air pollution degrades odours of familiar plants, needs investigating. Accounting for the capacity of mammalian herbivores to use plant odour cues will improve models of both their foraging behaviour and the ecosystem impacts of their foraging. |
en_ZA |
dc.description.department |
Mammal Research Institute |
en_ZA |
dc.description.department |
Zoology and Entomology |
en_ZA |
dc.description.embargo |
2020-09-01 |
|
dc.description.librarian |
hj2019 |
en_ZA |
dc.description.sponsorship |
A.S. and M.H.S. were supported by the South African National Research Foundation (Grants #: 90691, 90448 & 97262). |
en_ZA |
dc.description.uri |
http://www.elsevier.com/locate/anbehav |
en_ZA |
dc.identifier.citation |
McArthur, C., Finnerty, P.B., Schmitt, M.H. et al. 2019, 'Plant volatiles are a salient cue for foraging mammals: elephants target preferred plants despite background plant odour', Animal Behaviour, vol. 155, pp. 199-216. |
en_ZA |
dc.identifier.issn |
0003-3472 (print) |
|
dc.identifier.issn |
1095-8282 (online) |
|
dc.identifier.other |
10.1016/j.anbehav.2019.07.002 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/71342 |
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dc.language.iso |
en |
en_ZA |
dc.publisher |
Elsevier |
en_ZA |
dc.rights |
© 2019 Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour. Notice : this is the author’s version of a work that was accepted for publication in Animal Behaviour. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Animal Behaviour, vol. 155, pp. 199-216, 2019, doi : 10.1016/j.anbehav.2019.07.002. |
en_ZA |
dc.subject |
Diet choice |
en_ZA |
dc.subject |
Foraging |
en_ZA |
dc.subject |
Green leaf volatile |
en_ZA |
dc.subject |
Herbivory |
en_ZA |
dc.subject |
Mammal |
en_ZA |
dc.subject |
Odour |
en_ZA |
dc.subject |
Olfaction |
en_ZA |
dc.subject |
Volatile organic compound |
en_ZA |
dc.subject |
Elephants |
en_ZA |
dc.title |
Plant volatiles are a salient cue for foraging mammals : elephants target preferred plants despite background plant odour |
en_ZA |
dc.type |
Postprint Article |
en_ZA |