Density-independent resource limitation and the transmission of an insect pathogen |
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Authors: | M Boots |
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Institution: | (1) Entomology Laboratory, College of Agriculture, Kyoto University, Sakyoku, Kyoto 606, Japan, JP |
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Abstract: | The effects of resource limitation on the transmission of a pathogen were explored. Resource limitation was achieved by replacing
part of the host’s diet with an indigestible bulking agent. Populations of the pyrallid moth, Plodia interpunctella, raised on high- and low-quality food regimes were exposed to a granulosis virus. Moths subjected to a lower food quality
were more likely to become infected, despite the fact that in previous studies, individuals showed no increased susceptibility
when exposed individually to the virus. This effect is suggested to be due to a higher exposure to the pathogen due to a faster
feeding rate and longer developmental period. The implications of resource levels to the population dynamics of host-pathogen
interactions are discussed.
Received: 8 July 1999 / Accepted: 14 February 2000 |
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Keywords: | Food quality Granulosis virus Plodia interpunctella Population dynamics |
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