Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 488150
Title Altered volatile profile associated with precopulatory mate guarding attracts spider mite males
Author(s) Oku, K.; Weldegergis, B.T.; Poelman, E.H.; Jong, P.W. de; Dicke, M.
Source Journal of Chemical Ecology 41 (2015). - ISSN 0098-0331 - p. 187 - 193.
Department(s) Laboratory of Entomology
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) female sex-pheromone - crab pagurus-filholi - urticae koch acari - tetranychus-urticae - aggregation pheromone - male competition - mating strategy - cydia-pomonella - predation risk - host-plant
Abstract Proximate factors affecting animal behavior include stimuli generated by conspecifics. In spider mites of the genus Tetranychus (Acari: Tetranychidae), males guard pre-reproductive quiescent females, because only the first mating results in fertilization. In a dual-choice experiment, more adult males of T. urticae were attracted to females guarded by a male than to solitary females. Because spider mites are known to perceive volatiles, we hypothesized that guarded and solitary females differ in the volatile blends emitted. To test this hypothesis, headspace volatiles of guarded females, solitary females, and solitary males were collected, respectively. GC/MS analysis detected octanal, methyl salicylate, ethyl 4-ethoxybenzoate, and methyl cis-dihydrojasmonate in all of the groups. Orthogonal Projection to Latent Structures Discriminant Analysis (OPLS-DA) of the blends clearly discriminated guarded females from solitary females, supporting our hypothesis. Individual compounds did not show significant difference in emission rates for guarded females vs. solitary females, suggesting that differences lay in the total blend composition. OPLS-DA did not discriminate between the blends emitted by guarded females and solitary males. In conclusion, the differences in the volatile blends are likely to mediate male discrimination between guarded and solitary females.
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