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Larval RNA Interference in the Red Flour Beetle, Tribolium castaneum
Published on: October 13, 2014
Dynamics of extinction in coupled populations of the flour beetle Tribolium castaneum
1Departamento de Parasitologia, IB, Universidade Estadual Paulista, CEP 18618-000, Botucatu, SP, Brazil. wgodoy@ibb.unesp.br
Abstract:
In this study we analyzed the effect of migration on the persistence time of coupled local populations of Tribolium in different environments. Four treatments were set up to compare different levels of environmental heterogeneity. We established high, low, moderate, and no heterogeneity. These levels were estimated by the different amounts of food offered to each population. To investigate how risk spreading works, a stochastic model for two subpopulations was employed. The high heterogeneity treatment resulted in the longest persistence, even though survival analysis revealed no significant difference among treatments. The magnitude of differences in growth rates among subpopulations is probably associated with persistence.
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