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Multivariate statistics coupled to generalised linear models reveal complex use of chemical cues by a parasitoid

Pareja, Martin and Mohib, Abdul and Birkett, Michael and Dufour, Samuel and Glinwood, Robert (2009). Multivariate statistics coupled to generalised linear models reveal complex use of chemical cues by a parasitoid. Animal behaviour. 77:4, 901-909
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Official URL: http://dx.doi.org/10.1016/j.anbehav.2008.12.016

Abstract

Understanding how animals integrate multiple cues, in particular complex mixtures of volatile chemicals, is a subject of current interest. Insect behavioural responses to volatile blends have traditionally been analysed separately to the changes in blends themselves, making it difficult to directly link behaviour to volatile cues. We coupled principal component analysis (PCA) and generalised linear models (GLMs) to directly link volatiles released by plants in response to pea aphid (Acyrthosiphon pisum) feeding to the behaviour of the aphid parasitoid Aphidius ervi. We used choice bioassays to compare parasitoid response to odours from aphid-damaged and undamaged plants then collected volatiles from the same plants used in bioassays and analysed volatile profiles with PCA. The principal components explaining 99% of the variation in the dataset were used as explanatory variables in a GLM to analyse the behavioural response. This was done for two plant species: alfalfa, Medicago sativa, and broad bean, Vicia faba. For each species, a single principal component was important in explaining insect attraction. In both cases it explained a small amount of variability in the volatile dataset (7.0% and 0.5% in M. sativa and V. faba respectively). For both plants, the analysis revealed the presence of volatiles that supported or inhibited parasitoid attraction. Compositional analysis of the blend revealed no major changes in either plant, highlighting that A. ervi can detect minor changes, ignoring the major variability in the blend. The approach could be valuable for behavioural studies on multi-sensory orientation by foraging animals.

Authors/Creators:Pareja, Martin and Mohib, Abdul and Birkett, Michael and Dufour, Samuel and Glinwood, Robert
Title:Multivariate statistics coupled to generalised linear models reveal complex use of chemical cues by a parasitoid
Series/Journal:Animal behaviour (1095-8282)
Year of publishing :2009
Volume:77
Number:4
Page range:901-909
Publisher:Elsevier
ISSN:1095-8282
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
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) > Zoology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:parasitoid, volatile
URN:NBN:urn:nbn:se:slu:epsilon-e-816
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-816
ID Code:9343
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
External funders:Carl Tryggers stiftelse för vetenskaplig forskning
Deposited By: Dr Robert Glinwood
Deposited On:19 Dec 2012 15:08
Metadata Last Modified:02 Dec 2014 10:54

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